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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2013	May 07, 2013
Document - Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Trading Symbol	lpsn
Entity Registrant Name	LIVEPERSON INC
Entity Central Index Key	0001102993
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		55,078,403

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 94,833	$ 103,339
Accounts receivable, net of allowance for doubtful accounts of $708 as of March 31, 2013 and December 31, 2012	24,601	23,830
Prepaid expenses and other current assets	8,918	6,369
Deferred tax assets, net	2,527	2,616
Total current assets	130,879	136,154
Property and equipment, net	18,159	17,495
Intangibles, net	15,313	15,681
Goodwill	32,724	32,645
Deferred tax assets, net	4,005	4,183
Deferred implementation costs, net of current	224	240
Security deposits	669	669
Other assets	1,498	1,509
Total assets	203,471	208,576
Current liabilities:
Accounts payable	10,737	11,125
Accrued expenses	16,214	17,911
Deferred revenue	6,746	6,525
Total current liabilities	33,697	35,561
Deferred revenue, net of current	1,262	1,263
Other liabilities	1,498	1,509
Total liabilities	36,457	38,333
Commitments and contingencies
Stockholders' equity:
Preferred stock, $.001 par value per share; 5,000,000 shares authorized, 0 shares issued and outstanding at March 31, 2013 and December 31, 2012
Common stock, $.001 par value per share; 100,000,000 shares authorized, 55,567,318 shares issued and outstanding at March 31, 2013 and 55,948,924 shares issued and outstanding at December 31, 2012	56	56
Additional paid-in capital	249,283	252,320
Accumulated deficit	(82,012)	(81,780)
Accumulated other comprehensive loss	(313)	(353)
Total stockholders' equity	167,014	170,243
Total liabilities and stockholders' equity	$ 203,471	$ 208,576

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 708	$ 708
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	55,567,318	55,948,924
Common stock, shares outstanding	55,567,318	55,948,924

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Revenue	$ 42,496	$ 36,759
Operating expenses:
Cost of revenue	10,134	7,923
Product development	8,021	6,657
Sales and marketing	14,478	11,089
General and administrative	10,238	6,125
Amortization of intangibles	224	77
Total operating expenses	43,095	31,871
(Loss) income from operations	(599)	4,888
Other income:
Financial income	26	331
Interest income	8	16
Total other income, net	34	347
(Loss) income before (benefit from) provision for income taxes	(565)	5,235
(Benefit from) provision for income taxes	(333)	2,112
Net (loss) income	$ (232)	$ 3,123
Basic net (loss) income per common share	$ 0.00	$ 0.06
Diluted net (loss) income per common share	$ 0.00	$ 0.06
Weighted average shares outstanding used in basic net (loss) income per common share calculation	55,864,045	54,419,498
Weighted average shares outstanding used in diluted net (loss) income per common share calculation	55,864,045	56,389,729

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (232)	$ 3,123
Foreign currency translation adjustment	40	(13)
Comprehensive (loss) income	$ (192)	$ 3,110

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=6519514

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-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Reference 14: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Research Bulletin (ARB)
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
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+ Details

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (232)	$ 3,123
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Stock-based compensation expense	3,051	2,155
Depreciation	2,050	1,628
Amortization of intangibles	418	77
Deferred income taxes	358	(632)
Provision for doubtful accounts, net		20
CHANGES IN OPERATING ASSETS AND LIABILITIES:
Accounts receivable	(798)	3,199
Prepaid expenses and other current assets	(2,600)	(831)
Deferred implementation costs	16	20
Security deposits	(3)	(184)
Other assets
Accounts payable	(1,550)	1,991
Accrued expenses	(1,580)	140
Deferred revenue	220	923
Net cash (used in) provided by operating activities	(650)	11,629
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment, including capitalized software	(1,664)	(1,730)
Acquisition of domains	(50)
Net cash used in investing activities	(1,714)	(1,730)
CASH FLOWS FROM FINANCING ACTIVITIES:
Excess tax benefit from the exercise of employee stock options	(6)	608
Proceeds from issuance of common stock in connection with the exercise of options	1,347	4,109
Repurchase of common stock	(7,428)
Net cash (used in) provided by financing activities	(6,087)	4,717
Effect of foreign exchange rate changes on cash and cash equivalents	(55)	(5)
Net (decrease) increase in cash and cash equivalents	(8,506)	14,611
Cash and cash equivalents at the beginning of the period	103,339	93,278
Cash and cash equivalents at the end of the period	$ 94,833	$ 107,889

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Supplemental disclosure of non-cash investing activities:
Capitalized equipment related to the Company's co-location facility	$ 1,648	$ 889
Net cash paid for income taxes	$ 34	$ 21

Summary Of Operations And Significant Accounting Policies

3 Months Ended

Mar. 31, 2013

Summary Of Operations And Significant Accounting Policies [Abstract]

Summary Of Operations And Significant Accounting Policies

(1) SUMMARY OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES

(A) SUMMARY OF OPERATIONS

LivePerson, Inc. (the “Company” or “LivePerson”) provides online engagement solutions offering a cloud-based platform which enables businesses to proactively connect with consumers through chat, voice and content delivery, across multiple channels and screens, including websites, social media, and mobile devices. The Company’s engagements are driven by insights derived from a broad set of consumer and business data, including historical, behavioral, operational, and third party data. Each engagement is based on proprietary analytics and a real-time understanding of consumer needs and business objectives. The Company’s products, coupled with its domain knowledge and industry expertise, have been proven to maximize the effectiveness of the online channel — by increasing sales, as well as consumer satisfaction and loyalty ratings for their customers, while also enabling their customers to reduce consumer service costs.

LivePerson monitors and analyzes valuable online consumer behavioral data on behalf of its customers. Spanning the breadth of an online visitor session starting from an initial keyword search, through actions on their customer’s website, and even into a shopping cart and an executed sale, this data enables the Company to develop unique insights into consumer behavior during specific transactions within a customer’s user base.

The Company’s primary revenue source is from the sale of LivePerson services to businesses of all sizes. The Company also offers an online marketplace that connects independent service providers (“Experts”) who provide information and knowledge for a fee via real-time chat with individual consumers (“Users”).

LivePerson was incorporated in the State of Delaware in November 1995 and the LivePerson service was introduced in November 1998. In April 2000, the Company completed an initial public offering and is currently traded on the Nasdaq Global Select Market and the Tel Aviv Stock Exchange. LivePerson is headquartered in New York City with offices in Amsterdam, Atlanta, London, Melbourne, San Francisco, Santa Monica and Tel Aviv.

(B) UNAUDITED CONDENSED CONSOLIDATED FINANCIAL INFORMATION

The accompanying condensed consolidated financial statements as of March 31, 2013 and for the three months ended March 31, 2013 and 2012 are unaudited. In the opinion of management, the unaudited condensed consolidated financial statements have been prepared on the same basis as the annual financial statements and reflect all adjustments, which include only normal recurring adjustments, necessary to present fairly the consolidated financial position of LivePerson as of March 31, 2013, and the consolidated results of operations, comprehensive (loss) income and cash flows for the interim periods ended March 31, 2013 and 2012. The financial data and other information disclosed in these notes to the condensed consolidated financial statements related to these periods are unaudited. The results of operations for any interim period are not necessarily indicative of the results of operations for any other future interim period or for a full fiscal year. The condensed consolidated balance sheet at December 31, 2012 has been derived from audited consolidated financial statements at that date.

Certain information and note disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). These unaudited interim condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto for the year ended December 31, 2012, included in the Company’s Annual Report on Form 10-K filed with the SEC on March 1, 2013.

The majority of the Company’s revenue is generated from monthly service revenues and related professional services from the sale of the LivePerson services. Because the Company provides its application as a service, the Company follows the provisions of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 605-10-S99, “Revenue Recognition” and ASC 605-25, “Revenue Recognition with Multiple-Element Arrangements.” The Company charges a monthly fee, which varies by type of service, the level of customer usage and website traffic, and in some cases, the number of orders placed via the Company’s online engagement solutions.

For certain of the Company’s larger customers, the Company may provide call center labor through an arrangement with one or more of several qualified vendors. For most of these customers, the Company passes the fee it incurs with the labor provider and its fee for the hosted services through to its customers in the form of a fixed fee for each order placed via the Company’s online engagement solutions. For these Pay for Performance (“PFP”) arrangements, the Company recognizes revenue net of the labor provider’s fee in accordance with ASC 605-45, “Principal Agent Considerations,” due primarily to the fact that the call center labor vendor is the primary obligor with respect to the labor services provided. Additionally, the Company performs as an agent without risk of loss for collection and does not bear inventory risk with respect to the outsourced labor services. Finally, the Company does not provide any part of the labor services, has no latitude in establishing prices for the labor services and generally does not have discretion in selecting the vendor.

The majority of the Company’s larger customers also pay a professional services fee related to implementation. The Company defers these implementation fees and associated direct costs and recognizes them ratably over the expected term of the customer relationship upon commencement of the hosting services. The Company may also charge professional service fees related to additional training, business consulting and analysis in support of the LivePerson services.

The Company also sells certain of the LivePerson services directly via Internet download. These services are marketed as LivePerson Pro and LivePerson Contact Center for small and mid-sized businesses (“SMBs”), and are paid for almost exclusively by credit card. Credit card payments accelerate cash flow and reduce the Company’s collection risk, subject to the merchant bank’s right to hold back cash pending settlement of the transactions. Sales of LivePerson Pro and LivePerson Contact Center may occur with or without the assistance of an online sales representative, rather than through face-to-face or telephone contact that is typically required for traditional direct sales.

The Company recognizes monthly service revenue based upon the fee charged for the LivePerson services, provided that there is persuasive evidence of an arrangement, no significant Company obligations remain, collection of the resulting receivable is probable and the amount of fees to be paid is fixed or determinable. The Company’s service agreements typically have twelve month terms and, in some cases, are terminable or may terminate upon 30 to 90 days’ notice without penalty. When professional service fees add value to the customer on a standalone basis, the Company recognizes professional service fees upon completion and customer acceptance in accordance with FASB Accounting Standards Update 2009-13. This guidance establishes a selling price hierarchy for determining the selling price of a deliverable, which is based on: (a) vendor-specific objective evidence; (b) third-party evidence; or (c) estimates. If a professional services arrangement does not qualify for separate accounting, the Company recognizes the fees, and the related labor costs, ratably over a period of 48 months, representing the Company’s current estimate of the term of the customer relationship.

For revenue generated from online transactions between Experts and Users, the Company recognizes revenue net of the Expert fees in accordance with ASC 605-45, “Principal Agent Considerations,” due primarily to the fact that the Expert is the primary obligor. Additionally, the Company performs as an agent without any risk of loss for collection, and is not involved in selecting the Expert or establishing the Expert’s fee. The Company collects a fee from the User and retains a portion of the fee, and then remits the balance to the Expert. Revenue from these transactions is recognized when there is persuasive evidence of an arrangement, no significant Company obligations remain, collection of the resulting receivable is probable and the amount of fees to be paid is fixed and determinable.

(D) STOCK-BASED COMPENSATION

The Company follows FASB ASC 718-10, “Stock Compensation,” which addresses the accounting for transactions in which an entity exchanges its equity instruments for goods or services, with a primary focus on transactions in which an entity obtains employee services in share-based payment transactions. ASC 718-10 requires measurement of the cost of employee services received in exchange for an award of equity instruments based on the grant-date fair value of the award (with limited exceptions). Incremental compensation costs arising from subsequent modifications of awards after the grant date must be recognized.

The following table summarizes stock-based compensation expense related to employee stock options under ASC 718-10 included in Company’s Statements of Operations for the three months ended March 31, 2013 and 2012:



	Three Months Ended
	March 31,
	2013		2012
Cost of revenue	$	420	$	314
Product development expense		870		609
Sales and marketing expense		746		552
General and administrative expense		1,015		680
Total stock based compensation included in operating expenses	$	3,051	$	2,155

The per share weighted average fair value of stock options granted during the three months ended March 31, 2013 and 2012 was $6.68 and $6.55, respectively. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:



	Three Months Ended
	March 31,
	2013		2012
Dividend yield		0.0%			0.0%
Risk-free interest rate		0.88%	0.81%	-	0.87%
Expected life (in years)		5.0			5.0

Historical volatility		58.65%	60.29%	-	60.81%

A description of the methods used in the significant assumptions used to estimate the fair value of stock-based compensation awards follows:

Dividend yield – The Company uses 0% as it has never issued dividends and does not anticipate issuing dividends in the near term.

Risk-free interest rate – The Company uses the market yield on U.S. Treasury securities at five years with constant maturity, representing the current expected life of stock options in years.

Expected life – The Company uses historical data to estimate the expected life of a stock option.

Historical volatility – The Company uses a trailing five year from grant date to determine volatility.

During 1998, the Company established the Stock Option and Restricted Stock Purchase Plan (the “1998 Plan”). Under the 1998 Plan, the Board of Directors could issue incentive stock options or nonqualified stock options to purchase up to 5,850,000 shares of common stock. The 2000 Stock Incentive Plan (the “2000 Plan”) succeeded the 1998 Plan. Under the 2000 Plan, the options which had been outstanding under the 1998 Plan were incorporated in the 2000 Plan increasing the number of shares available for issuance under the plan by approximately 4,150,000, thereby reserving for issuance 10,000,000 shares of common stock in the aggregate.

The Company established the 2009 Stock Incentive Plan (as amended and restated, the “2009 Plan”) as a successor to the 2000 Plan. Under the 2009 Plan, the options which had been outstanding under the 2000 Plan were incorporated into the 2009 Plan and the Company increased the number of shares available for issuance under the plan by 6,000,000. The Company amended the 2009 stock incentive plan (the “Amended 2009 Plan”) effective June 7, 2012. The Amended 2009 Plan increased the number of shares authorized for issuance under the plan by an additional 4,250,000, thereby reserving for issuance 23,817,744 shares of common stock in the aggregate. Options to acquire common stock granted thereunder have ten-year terms. As of March 31, 2013, approximately 15,300,000 shares of common stock were reserved for issuance under the 2009 Plan (taking into account all option exercises through March 31, 2013). As of March 31, 2013, there was approximately $37,282 of total unrecognized compensation cost related to nonvested share-based compensation arrangements. That cost is expected to be recognized over a weighted average period of approximately 2.0 years.

In March 2000, the Company adopted the 2000 Employee Stock Purchase Plan with 450,000 shares of common stock initially reserved for issuance (the “2000 ESPP”). The 2000 ESPP expired on its terms on the last day of April 2010.

In June 2010, our stockholders approved the 2010 Employee Stock Purchase Plan with 1,000,000 shares of common stock initially reserved for issuance. As of March 31, 2013, approximately 818,000 shares of common stock were reserved for issuance under the Employee Stock Purchase Plan (taking into account all share purchases through March 31, 2013).

A summary of the Company’s stock option activity and weighted average exercise prices follows:



		Weighted
		Average
	Options	Exercise Price
Options outstanding at December 31, 2012	9,841,479	$	11.06
Options granted	310,300		13.37
Options exercised	(124,943)		7.76
Options cancelled	(243,793)		13.92
Options outstanding at March 31, 2013	9,783,043		11.11
Options exercisable at March 31, 2013	3,494,350	$	6.62

The total value of stock options exercised during the three months ended March 31, 2013 was approximately $778. The total intrinsic value of options exercisable at March 31, 2013 was approximately $24,070. The total intrinsic value of nonvested options at March 31, 2013 is approximately $8,902. The total intrinsic value of all outstanding options at March 31, 2013 is $32,972.

A summary of the status of the Company’s nonvested shares as of December 31, 2012, and changes during the three months ended March 31, 2013 is as follows:



		Weighted
		Average Grant-
	Options	Date Fair Value
Nonvested Shares at December 31, 2012	6,621,251	$	6.84
Granted	310,300		6.68
Vested	(399,065)		3.81
Cancelled	(243,793)		7.16
Nonvested Shares at March 31, 2013	6,288,693	$	7.00

(E) BASIC AND DILUTED NET INCOME (LOSS) PER SHARE

The Company calculates earnings per share (“EPS”) in accordance with the provisions of ASC 260-10 and the guidance of SEC Staff Accounting Bulletin (“SAB”) No. 98. Under ASC 260-10, basic EPS excludes dilution for common stock equivalents and is computed by dividing net income or loss attributable to common shareholders by the weighted average number of common shares outstanding for the period. All options, warrants or other potentially dilutive instruments issued for nominal consideration are required to be included in the calculation of basic and diluted net income attributable to common stockholders. Diluted EPS is calculated using the treasury stock method and reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock and resulted in the issuance of common stock.

Diluted net loss per common share for the three months ended March 31, 2013 does not include the effect of options to purchase 3,626,240 of common stock as the effect of their inclusion is anti-dilutive. Diluted net income per common share for the three months ended March 31, 2012 includes the effect of options to purchase 4,509,618 shares of common stock with a weighted average exercise price of $5.37.

A reconciliation of shares used in calculating basic and diluted earnings per share follows:



	Three Months Ended
	March 31,
	2013	2012
Basic	55,864,045	54,419,498
Effect of assumed exercised options	—	1,970,231
Diluted	55,864,045	56,389,729

(F) SEGMENT REPORTING

The Company accounts for its segment information in accordance with the provisions of ASC 280-10, “Segment Reporting.” ASC 280-10 establishes annual and interim reporting standards for operating segments of a company. ASC 280-10 requires disclosures of selected segment-related financial information about products, major customers, and geographic areas based on the Company’s internal accounting methods. The Company is organized into two operating segments for purposes of making operating decisions and assessing performance. The Business segment facilitates real-time online interactions – chat, voice and content delivery across multiple channels and screens for global corporations of all sizes. The Consumer segment facilitates online transactions between Experts and Users and sells its services to consumers. Both segments currently generate their revenue primarily in the U.S. The chief operating decision makers evaluate performance, make operating decisions, and allocate resources based on the operating income of each segment. The reporting segments follow the same accounting polices used in the preparation of the Company’s consolidated financial statements which are described in the summary of significant accounting policies. The Company allocates cost of revenue, sales and marketing and amortization of purchased intangibles to the segments, but it does not allocate product development expenses, general and administrative expenses and income tax expense because management does not use this information to measure performance of the operating segments. There are currently no inter-segment sales.

Summarized financial information by segment for the three months ended March 31, 2013, based on the Company’s internal financial reporting system utilized by the Company’s chief operating decision makers, follows:



	Consolidated		Corporate		Business		Consumer
Revenue:
Hosted services – Business	$	36,144	$	—	$	36,144	$	—
Hosted services – Consumer		3,620		—				3,620
Professional services		2,732		—		2,732		—
Total revenue		42,496		—		38,876		3,620
Cost of revenue		10,134		—		9,536		598
Sales and marketing		14,478		—		13,206		1,272
Amortization of intangibles		224		—		224		—
Unallocated corporate expenses		18,259		18,259		—		—
Operating income (loss)	$	(599)	$	(18,259)	$	15,910	$	1,750

Summarized financial information by segment for the three months ended March 31, 2012, based on the Company’s internal financial reporting system utilized by the Company’s chief operating decision makers, follows:



	Consolidated		Corporate		Business		Consumer
Revenue:
Hosted services – Business	$	31,240	$	—	$	31,240	$	—
Hosted services – Consumer		3,848		—		—		3,848
Professional services		1,671		—		1,671		—
Total revenue		36,759		—		32,911		3,848
Cost of revenue		7,923		—		7,368		555
Sales and marketing		11,089		—		9,489		1,600
Amortization of intangibles		77		—		77		—
Unallocated corporate expenses		12,782		12,782		—		—
Operating income (loss)	$	4,888	$	(12,782)	$	15,977	$	1,693

Revenues attributable to domestic and foreign operations for the three months ended March 31, 2013 and 2012, follows:



	March 31,
	2013		2012
United States	$	30,085	$	28,156
United Kingdom		6,984		4,876
Other countries		5,427		3,727
Total revenue	$	42,496	$	36,759

Long-lived assets by geographic region follows:



	March 31, 2013		December 31, 2012
United States	$	35,445	$	35,711
Israel		24,213		23,750
Australia		10,437		10,361
United Kingdom		2,497		2,600
Total long-lived assets	$	72,592	$	72,422

(G) GOODWILL AND INTANGIBLE ASSETS

The changes in the carrying amount of goodwill for the three months ended March 31, 2013 are as follows:



	Total		Business		Consumer
Balance as of December 31, 2012	$	32,645	$	24,621	$	8,024
Adjustments to goodwill:
Engage acquisition (see Note 3)		79		79		—
Balance as of March 31, 2013	$	32,724	$	24,700	$	8,024

The changes in the carrying amount of goodwill for the year ended December 31, 2012 are as follows:



	Total		Business		Consumer
Balance as of December 31, 2011	$	24,090	$	16,066	$	8,024
Adjustments to goodwill:
Engage acquisition		6,073		6,073		—
LookIO acquisition		2,405		2,405		—
Contingent earnout payments (see Note 3)		77		77		—
Balance as of December 31, 2012	$	32,645	$	24,621	$	8,024

Intangible assets are summarized as follows (see Note 3):

Acquired Intangible Assets



	As of March 31, 2013
			Weighted
	Gross		Average
	Carrying		Amortization		Accumulated
	Amount		Period		Amortization
Amortizing intangible assets:
Technology	$	18,533	3.8	years	$	6,099
Customer relationships		5,061	3.5	years		2,650
Trade names		725	2.7	years		668
Non-compete agreements		486	1.2	years		440
Patents		475	11.0	years		156
Other		285	3.0	years		239
Total	$	25,565			$	10,252



	As of December 31, 2012
			Weighted
	Gross		Average
	Carrying		Amortization		Accumulated
	Amount		Period		Amortization
Amortizing intangible assets:
Technology	$	18,533	3.8	years	$	5,904
Customer relationships		5,061	3.5	years		2,485
Trade names		725	2.7	years		644
Non-compete agreements		486	1.2	years		421
Patents		475	11.0	years		145
Other		235	3.0	years		235
Total	$	25,515			$	9,834

Amortization expense is calculated on a straight-line basis over the estimated useful life of the asset. Aggregate amortization expense for intangible assets was $418 and $77 for the three months ended March 31, 2013 and 2012, respectively. Estimated amortization expense for the next five years is: $3,263 in 2013, $4,134 in 2014, $3,772 in 2015, $3,313 in 2016, $718 in 2017 and $113 thereafter.

(H) RECENTLY ISSUED ACCOUNTING STANDARDS

In February 2013, the FASB issued ASU No. 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. This ASU requires disclosures regarding reclassifications out of accumulated other comprehensive income in a single location in the financial statements by component. This ASU is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2012. The adoption of this ASU, effective January 1, 2013, did not have an impact on the Company’s consolidated financial statements.

Balance Sheet Components

3 Months Ended

Mar. 31, 2013

Balance Sheet Components [Abstract]

Balance Sheet Components

(2) BALANCE SHEET COMPONENTS

Property and Equipment

Property and equipment is summarized as follows:



	March 31, 2013		December 31, 2012
Computer equipment and software	$	40,952	$	38,649
Furniture, equipment and building improvements		7,245		6,834
		48,197		45,483
Less accumulated depreciation		30,038		27,988
Total	$	18,159	$	17,495

Accrued Expenses

Accrued expenses consist of the following:



	March 31, 2013		December 31, 2012
Payroll and other employee related costs	$	6,236	$	9,199
Professional services and consulting and other vendor fees		6,146		5,698
Sales commissions		1,394		490
Contingent earnout (Note 3)		1,660		1,660
Other		778		864
Total	$	16,214	$	17,911

Acquisitions

3 Months Ended

Mar. 31, 2013

Acquisitions [Abstract]

Acquisitions

(3) ACQUISITIONS

Amadesa Ltd.

On May 31, 2012, the Company acquired technology assets from Amadesa, Ltd., an Israeli-based start-up, for aggregate cash consideration of approximately $10,301. The acquisition provides the Company with sophisticated, machine-learning predictive modeling that it expects to leverage across multiple engagement channels, enhancing its real-time intelligent engagement platform. The asset is allocated to “Intangibles, net” on the Company’s balance sheet and will be amortized over its expected period of benefit. The acquisition did not have a material impact on the Company’s reported operating results. Total acquisition costs incurred were approximately $497 and are included in “Intangibles, net” on the Company’s March 31, 2013 balance sheet.

LookIO

On June 13, 2012, the Company acquired LookIO, Inc., a start-up that provides mobile engagement solutions. The transaction was accounted for under the purchase method of accounting and, accordingly, the operating results of LookIO, Inc. were included in the Company’s consolidated results of operations from the date of acquisition. The acquisition did not have a material impact on the Company’s reported operating results.

The purchase price was approximately $2,884, which included the issuance of 109,517 shares of the Company’s common stock valued at approximately $1,984, based on the quoted market price of the Company’s common stock on the day of closing, and a cash payment of $900. Total acquisition costs incurred were approximately $157 and were included in general and administrative expenses in the Company’s Consolidated Statements of Operations for the same period. The acquisition adds plug-and-play mobile engagement capabilities to LivePerson’s platform allowing its customers to connect with consumers on mobile devices. All 109,517 shares are included in the weighted average shares outstanding used in basic and diluted net income (loss) per share as of the acquisition date. The purchase price was allocated based on management’s estimate of fair values, taking into account all relevant information available. A substantial amount of the purchase price was allocated to intangibles (technology) and the excess was allocated to goodwill. The goodwill is not deductible for income tax purposes. The intangible asset is being amortized over its expected period of benefit. In addition to the purchase price, certain founders can earn an additional 30,422 shares of LivePerson common stock by achieving an employment milestone by providing continued services through a specified date. The Company valued these shares at approximately $551, based on the quoted market price of the Company’s common stock on the day of closing. In accordance with ASC 805-10, the Company is accruing this contingent compensation ratably over the requisite employment period.

Management’s allocation of the purchase price in connection with the Look.io acquisition is as follows:



Intangible assets (technology)	$	767
Goodwill		2,405
		3,172
Deferred tax liability		(288)
Total purchase price consideration	$	2,884

Engage Pty Ltd.

On November 9, 2012, the Company acquired all outstanding shares of Engage Pty Ltd. (“Engage”), an Australian provider of cloud-based customer contact solutions. The transaction was accounted for under the purchase method of accounting and, accordingly, the operating results of Engage were included in the Company’s consolidated results of operations from the date of acquisition. The acquisition did not have a material impact on the Company’s reported operating results.

The purchase price was approximately $10,591. The total acquisition costs incurred in the year ended December 31, 2012 were approximately $494 and are included in general and administrative expenses in the Company’s Consolidated Statements of Operations for the same period. The acquisition enhances the Company’s ability to offer intelligent engagement solutions to businesses in the Asia Pacific region. Of the total purchase price, $839 was allocated to the net book values of the acquired assets and assumed liabilities. The historical carrying amounts of such assets and liabilities approximated their fair values. All receivables acquired are expected to be collectible. The purchase price in excess of the fair value of the net book values of the assets acquired and liabilities assumed was allocated to intangible assets based on management’s best estimate of fair values, taking into account all relevant information available at the time of acquisition, and the excess was allocated to goodwill. The goodwill is not deductible for tax purposes. The intangible assets are being amortized over their expected period of benefit. The purchase price includes approximately $1,660 of potential earn-out consideration for the shareholders if certain revenue targets are achieved. The earn-out is payable in shares of LivePerson common stock. The Company recorded the contingent earn-out as part of the purchase price. In accordance with ASC 480, the Company has classified this amount as a liability and the amount is included in the March 31, 2013 balance sheet, due to the variable number of shares that will be issued if and when the targets are achieved. The Company will assess the earn-out calculation in future periods and any future adjustments will affect operating income. During the first quarter ended March 31, 2013, the Company incurred an additional net working capital adjustment of $79. This amount has been included as part of the purchase price consideration and is classified as a liability on the March 31, 2013 balance sheet.

Management’s preliminary allocation of the purchase price in connection with the Engage acquisition is as follows:



Cash	$	386
Accounts Receivable		3,454
Other Current Assets		57
Property and equipment		432
Other Assets		104
Intangible assets		3,600
Goodwill		6,152
		14,185
Liabilities Assumed		(2,632)
Deferred tax liability		(962)
Total purchase price consideration	$	10,591

The components of the intangible assets listed in the above table are as follows:



	Weighted Average Useful Life (Months)		Amount
Technology	36	$	768
Trade-name	12		95
Customer relationships	48		2,661
Non-compete agreements	12		76
		$	3,600

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

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Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph F4
-Subparagraph e
-Appendix F

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Reference 19: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Fair Value Measurements

3 Months Ended

Mar. 31, 2013

Fair Value Measurements Abstract]

Fair Value Measurements

(4) FAIR VALUE MEASUREMENTS

The Company follows the provisions of ASC 820-10, Fair Value Measurements, for financial assets and liabilities. This ASC defines fair value, establishes a framework for measuring fair value, and expands the related disclosure requirements. This ASC indicates, among other things, that a fair value measurement assumes a transaction to sell an asset or transfer a liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. In order to increase consistency and comparability in fair value measurements, ASC 820-10 establishes a hierarchy for observable and unobservable inputs used to measure fair value into three broad levels, which are described below:



Level 1: Quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 inputs.



Level 2: Observable prices that are based on inputs not quoted on active markets, but corroborated by market data.


		Level 3: Unobservable inputs are used when little or no market data is available. The fair value hierarchy gives the lowest priority to Level 3 inputs.

In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as considers counterparty credit risk in its assessment of fair value.

The carrying value of cash and cash equivalents, accounts receivable, accounts payable and certain accrued expenses approximate fair value because of their short-term maturity. On a nonrecurring basis, the Company uses fair value measures when analyzing asset impairment. Long-lived tangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If it is determined such indicators are present and the review indicates that the assets will not be fully recoverable, based on undiscounted estimated cash flows over the remaining amortization periods, their carrying values are reduced to estimated fair value. The Company uses an income approach and inputs that constitute level 3. During the third quarter of each year, the Company evaluates goodwill for impairment at the reporting unit level. The Company uses a combination of discounted cash flows and other qualitative factors in accordance with ASU No. 2011-08 to determine whether it is "more likely than not" that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step goodwill impairment test. This measurement is classified based on level 3 input.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 11: http://www.xbrl.org/2003/role/presentationRef
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Reference 12: http://www.xbrl.org/2003/role/presentationRef
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Commitments And Contingencies	3 Months Ended
Commitments And Contingencies	Mar. 31, 2013
Commitments And Contingencies [Abstract]
Commitments And Contingencies	(5) COMMITMENTS AND CONTINGENCIES The Company leases facilities and certain equipment under agreements accounted for as operating leases. These leases generally require the Company to pay all executory costs such as maintenance and insurance. Rental expense for operating leases for the three months ended March 31, 2013 and 2012 was approximately $2,501 and $1,599, respectively. Employee Benefit Plans The Company has a 401(k) defined contribution plan covering all eligible employees. The Company provides for employer matching contributions equal to 50% of employee contributions, up to the lesser of 5% of eligible compensation or $6. Matching contributions are deposited in to the employees 401(k) account and are subject to 5 year graded vesting. Salaries and related expenses include $226 and $167 of employer matching contributions for the three months ended March 31, 2013 and 2012, respectively.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Legal Matters	3 Months Ended
Legal Matters	Mar. 31, 2013
Legal Matters [Abstract]
Legal Matters	(6) LEGAL MATTERS On February 7, 2012, the Company filed suit against Pragmatus Telecom LLC in the District of Delaware, seeking a declaratory judgment that the Company’s products do not infringe three patents owned by Pragmatus which Pragmatus had previously asserted were infringed by certain of the Company’s customers. On March 13, 2012, the Company amended the complaint to add a request for a declaratory judgment that those three patents are invalid. On April 6, 2012, Pragmatus answered the Amended Complaint, and asserted counterclaims against the Company asserting infringement of the same three patents and seeking unspecified monetary damages and injunctive relief. Pursuant to a June 1, 2012 Scheduling Order entered by the Court, trial in this matter will begin on or after September 8, 2014. The Company currently does not expect that the outcome of this matter will have a material adverse effect on the Company’s financial condition, results of operations or cash flows. However, litigation is inherently unpredictable; therefore, judgments could be rendered or settlements entered, that could adversely affect the Company’s operating results or cash flows in a particular period. Though it is reasonably possible that the Company will incur a liability associated with this litigation, the amount of any such liability is not reasonably estimable at this time. On September 14, 2012, Community United IP, LLC filed a patent infringement case in the District of Delaware against the Company and co-defendants 1-800-Flowers.com, Discover Card Services, Inc., EarthLink, Inc., QVC, Inc., and Cellco Partnership d/b/a Verizon Wireless based on the co-defendants’ alleged use of technology supplied by the Company and seeking unspecified monetary damages. On November 16, 2012, Community United filed an amended complaint, which Defendants answered on December 28, 2012. The Company currently does not expect that the outcome of this matter will have a material adverse effect on the Company’s financial condition, results of operations or cash flows. However, litigation is inherently unpredictable; therefore, judgments could be rendered or settlements entered that could adversely affect the Company’s operating results or cash flows in a particular period. Though it is reasonably possible that the Company will incur a liability associated with this litigation, the amount of any such liability is not reasonably estimable at this time. The Company routinely assess all of its litigation and threatened litigation as to the probability of ultimately incurring a liability, and records its best estimate of the ultimate loss in situations where it assesses the likelihood of loss as probable. From time to time, the Company is involved in or subject to legal, administrative and regulatory proceedings, claims, demands and investigations arising in the ordinary course of business, including direct claims brought by or against the Company with respect to intellectual property, contracts, employment and other matters, as well as claims brought against its customers for whom it has a contractual indemnification obligation. The Company accrues for a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Significant judgment is required in both the determination of probability and the determination as to whether a loss is reasonably estimable. In addition, in the event the Company determines that a loss is not probable, but is reasonably possible, and it becomes possible to develop what the Company believes to be a reasonable range of possible loss, then the Company will include disclosures related to such matter as appropriate and in compliance with ASC 450. The accruals or estimates, if any, resulting from the foregoing analysis, are reviewed at least quarterly and adjusted to reflect the impact of negotiations, settlements, rulings, advice of legal counsel and other information and events pertaining to a particular matter. To the extent there is a reasonable possibility that the losses could exceed the amounts already accrued, the Company will, as applicable, adjust the accrual in the period the determination is made, disclose an estimate of the additional loss or range of loss, indicate that the estimate is immaterial with respect to its financial statements as a whole or, if the amount of such adjustment cannot be reasonably estimated, disclose that an estimate cannot be made.

Summary Of Operations And Significant Accounting Policies (Policy)

3 Months Ended

Mar. 31, 2013

Summary Of Operations And Significant Accounting Policies [Abstract]

SUMMARY OF OPERATIONS

(A) SUMMARY OF OPERATIONS

UNAUDITED CONDENSED CONSOLIDATED FINANCIAL INFORMATION

(B) UNAUDITED CONDENSED CONSOLIDATED FINANCIAL INFORMATION

REVENUE RECOGNITION

STOCK-BASED COMPENSATION

(D) STOCK-BASED COMPENSATION



	Three Months Ended
	March 31,
	2013		2012
Cost of revenue	$	420	$	314
Product development expense		870		609
Sales and marketing expense		746		552
General and administrative expense		1,015		680
Total stock based compensation included in operating expenses	$	3,051	$	2,155



	Three Months Ended
	March 31,
	2013		2012
Dividend yield		0.0%			0.0%
Risk-free interest rate		0.88%	0.81%	-	0.87%
Expected life (in years)		5.0			5.0

Historical volatility		58.65%	60.29%	-	60.81%

A description of the methods used in the significant assumptions used to estimate the fair value of stock-based compensation awards follows:

Dividend yield – The Company uses 0% as it has never issued dividends and does not anticipate issuing dividends in the near term.

Risk-free interest rate – The Company uses the market yield on U.S. Treasury securities at five years with constant maturity, representing the current expected life of stock options in years.

Expected life – The Company uses historical data to estimate the expected life of a stock option.

Historical volatility – The Company uses a trailing five year from grant date to determine volatility.

A summary of the Company’s stock option activity and weighted average exercise prices follows:



		Weighted
		Average
	Options	Exercise Price
Options outstanding at December 31, 2012	9,841,479	$	11.06
Options granted	310,300		13.37
Options exercised	(124,943)		7.76
Options cancelled	(243,793)		13.92
Options outstanding at March 31, 2013	9,783,043		11.11
Options exercisable at March 31, 2013	3,494,350	$	6.62

A summary of the status of the Company’s nonvested shares as of December 31, 2012, and changes during the three months ended March 31, 2013 is as follows:



		Weighted
		Average Grant-
	Options	Date Fair Value
Nonvested Shares at December 31, 2012	6,621,251	$	6.84
Granted	310,300		6.68
Vested	(399,065)		3.81
Cancelled	(243,793)		7.16
Nonvested Shares at March 31, 2013	6,288,693	$	7.00

BASIC AND DILUTED NET INCOME (LOSS) PER SHARE

(E) BASIC AND DILUTED NET INCOME (LOSS) PER SHARE

A reconciliation of shares used in calculating basic and diluted earnings per share follows:



	Three Months Ended
	March 31,
	2013	2012
Basic	55,864,045	54,419,498
Effect of assumed exercised options	—	1,970,231
Diluted	55,864,045	56,389,729

SEGMENT REPORTING

(F) SEGMENT REPORTING



	Consolidated		Corporate		Business		Consumer
Revenue:
Hosted services – Business	$	36,144	$	—	$	36,144	$	—
Hosted services – Consumer		3,620		—				3,620
Professional services		2,732		—		2,732		—
Total revenue		42,496		—		38,876		3,620
Cost of revenue		10,134		—		9,536		598
Sales and marketing		14,478		—		13,206		1,272
Amortization of intangibles		224		—		224		—
Unallocated corporate expenses		18,259		18,259		—		—
Operating income (loss)	$	(599)	$	(18,259)	$	15,910	$	1,750



	Consolidated		Corporate		Business		Consumer
Revenue:
Hosted services – Business	$	31,240	$	—	$	31,240	$	—
Hosted services – Consumer		3,848		—		—		3,848
Professional services		1,671		—		1,671		—
Total revenue		36,759		—		32,911		3,848
Cost of revenue		7,923		—		7,368		555
Sales and marketing		11,089		—		9,489		1,600
Amortization of intangibles		77		—		77		—
Unallocated corporate expenses		12,782		12,782		—		—
Operating income (loss)	$	4,888	$	(12,782)	$	15,977	$	1,693

Revenues attributable to domestic and foreign operations for the three months ended March 31, 2013 and 2012, follows:



	March 31,
	2013		2012
United States	$	30,085	$	28,156
United Kingdom		6,984		4,876
Other countries		5,427		3,727
Total revenue	$	42,496	$	36,759

Long-lived assets by geographic region follows:



	March 31, 2013		December 31, 2012
United States	$	35,445	$	35,711
Israel		24,213		23,750
Australia		10,437		10,361
United Kingdom		2,497		2,600
Total long-lived assets	$	72,592	$	72,422

GOODWILL AND INTANGIBLE ASSETS

(G) GOODWILL AND INTANGIBLE ASSETS

The changes in the carrying amount of goodwill for the three months ended March 31, 2013 are as follows:



	Total		Business		Consumer
Balance as of December 31, 2012	$	32,645	$	24,621	$	8,024
Adjustments to goodwill:
Engage acquisition (see Note 3)		79		79		—
Balance as of March 31, 2013	$	32,724	$	24,700	$	8,024

The changes in the carrying amount of goodwill for the year ended December 31, 2012 are as follows:



	Total		Business		Consumer
Balance as of December 31, 2011	$	24,090	$	16,066	$	8,024
Adjustments to goodwill:
Engage acquisition		6,073		6,073		—
LookIO acquisition		2,405		2,405		—
Contingent earnout payments (see Note 3)		77		77		—
Balance as of December 31, 2012	$	32,645	$	24,621	$	8,024

Intangible assets are summarized as follows (see Note 3):

Acquired Intangible Assets



	As of March 31, 2013
			Weighted
	Gross		Average
	Carrying		Amortization		Accumulated
	Amount		Period		Amortization
Amortizing intangible assets:
Technology	$	18,533	3.8	years	$	6,099
Customer relationships		5,061	3.5	years		2,650
Trade names		725	2.7	years		668
Non-compete agreements		486	1.2	years		440
Patents		475	11.0	years		156
Other		285	3.0	years		239
Total	$	25,565			$	10,252



	As of December 31, 2012
			Weighted
	Gross		Average
	Carrying		Amortization		Accumulated
	Amount		Period		Amortization
Amortizing intangible assets:
Technology	$	18,533	3.8	years	$	5,904
Customer relationships		5,061	3.5	years		2,485
Trade names		725	2.7	years		644
Non-compete agreements		486	1.2	years		421
Patents		475	11.0	years		145
Other		235	3.0	years		235
Total	$	25,515			$	9,834

RECENTLY ISSUED ACCOUNTING STANDARDS

(H) RECENTLY ISSUED ACCOUNTING STANDARDS

- Definition

Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.

+ References + Details

- Definition

Disclosure of accounting policy for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction is generally disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to recognition of revenue. The disclosure also may indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction.

+ References + Details

- Definition

Disclosure of accounting policy for stock option and stock incentive plans. This disclosure may include (1) the types of stock option or incentive plans sponsored by the entity (2) the groups that participate in (or are covered by) each plan (3) significant plan provisions and (4) how stock compensation is measured, and the methodologies and significant assumptions used to determine that measurement.

+ References + Details

Summary Of Operations And Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2013

Summary Of Operations And Significant Accounting Policies [Abstract]

Summary Of Stock-Based Compensation Expense Related To Employee Stock Options



	Three Months Ended
	March 31,
	2013		2012
Cost of revenue	$	420	$	314
Product development expense		870		609
Sales and marketing expense		746		552
General and administrative expense		1,015		680
Total stock based compensation included in operating expenses	$	3,051	$	2,155

Weighted Average Assumptions Of Fair Value Options Using Black-Scholes Option-Pricing Model

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:



	Three Months Ended
	March 31,
	2013		2012
Dividend yield		0.0%			0.0%
Risk-free interest rate		0.88%	0.81%	-	0.87%
Expected life (in years)		5.0			5.0

Historical volatility		58.65%	60.29%	-	60.81%

Summary Of Stock Option Activity And Weighted Average Exercise Prices

A summary of the Company’s stock option activity and weighted average exercise prices follows:



		Weighted
		Average
	Options	Exercise Price
Options outstanding at December 31, 2012	9,841,479	$	11.06
Options granted	310,300		13.37
Options exercised	(124,943)		7.76
Options cancelled	(243,793)		13.92
Options outstanding at March 31, 2013	9,783,043		11.11
Options exercisable at March 31, 2013	3,494,350	$	6.62

Summary Of Status Of Nonvested Shares

A summary of the status of the Company’s nonvested shares as of December 31, 2012, and changes during the three months ended March 31, 2013 is as follows:



		Weighted
		Average Grant-
	Options	Date Fair Value
Nonvested Shares at December 31, 2012	6,621,251	$	6.84
Granted	310,300		6.68
Vested	(399,065)		3.81
Cancelled	(243,793)		7.16
Nonvested Shares at March 31, 2013	6,288,693	$	7.00

Reconciliation Of Shares Used In Calculating Basic And Diluted Earnings Per Share

A reconciliation of shares used in calculating basic and diluted earnings per share follows:



	Three Months Ended
	March 31,
	2013	2012
Basic	55,864,045	54,419,498
Effect of assumed exercised options	—	1,970,231
Diluted	55,864,045	56,389,729

Summary Of Financial Information By Segment



	Consolidated		Corporate		Business		Consumer
Revenue:
Hosted services – Business	$	36,144	$	—	$	36,144	$	—
Hosted services – Consumer		3,620		—				3,620
Professional services		2,732		—		2,732		—
Total revenue		42,496		—		38,876		3,620
Cost of revenue		10,134		—		9,536		598
Sales and marketing		14,478		—		13,206		1,272
Amortization of intangibles		224		—		224		—
Unallocated corporate expenses		18,259		18,259		—		—
Operating income (loss)	$	(599)	$	(18,259)	$	15,910	$	1,750



	Consolidated		Corporate		Business		Consumer
Revenue:
Hosted services – Business	$	31,240	$	—	$	31,240	$	—
Hosted services – Consumer		3,848		—		—		3,848
Professional services		1,671		—		1,671		—
Total revenue		36,759		—		32,911		3,848
Cost of revenue		7,923		—		7,368		555
Sales and marketing		11,089		—		9,489		1,600
Amortization of intangibles		77		—		77		—
Unallocated corporate expenses		12,782		12,782		—		—
Operating income (loss)	$	4,888	$	(12,872)	$	15,977	$	1,693

Revenues Attributable To Domestic And Foreign Operations

Revenues attributable to domestic and foreign operations for the three months ended March 31, 2013 and 2012, follows:



	March 31,
	2013		2012
United States	$	30,085	$	28,156
United Kingdom		6,984		4,876
Other countries		5,427		3,727
Total revenue	$	42,496	$	36,759

Long-Lived Assets By Geographic Region

Long-lived assets by geographic region follows:



	March 31, 2013		December 31, 2012
United States	$	35,445	$	35,711
Israel		24,213		23,750
Australia		10,437		10,361
United Kingdom		2,497		2,600
Total long-lived assets	$	72,592	$	72,422

Changes In Carrying Amount Of Goodwill

The changes in the carrying amount of goodwill for the three months ended March 31, 2013 are as follows:



	Total		Business		Consumer
Balance as of December 31, 2012	$	32,645	$	24,621	$	8,024
Adjustments to goodwill:
Engage acquisition (see Note 3)		79		79		—
Balance as of March 31, 2013	$	32,724	$	24,700	$	8,024

The changes in the carrying amount of goodwill for the year ended December 31, 2012 are as follows:



	Total		Business		Consumer
Balance as of December 31, 2011	$	24,090	$	16,066	$	8,024
Adjustments to goodwill:
Engage acquisition		6,073		6,073		—
LookIO acquisition		2,405		2,405		—
Contingent earnout payments (see Note 3)		77		77		—
Balance as of December 31, 2012	$	32,645	$	24,621	$	8,024

Summary Of Intangible Assets

Intangible assets are summarized as follows (see Note 3):

Acquired Intangible Assets



	As of March 31, 2013
			Weighted
	Gross		Average
	Carrying		Amortization		Accumulated
	Amount		Period		Amortization
Amortizing intangible assets:
Technology	$	18,533	3.8	years	$	6,099
Customer relationships		5,061	3.5	years		2,650
Trade names		725	2.7	years		668
Non-compete agreements		486	1.2	years		440
Patents		475	11.0	years		156
Other		285	3.0	years		239
Total	$	25,565			$	10,252



	As of December 31, 2012
			Weighted
	Gross		Average
	Carrying		Amortization		Accumulated
	Amount		Period		Amortization
Amortizing intangible assets:
Technology	$	18,533	3.8	years	$	5,904
Customer relationships		5,061	3.5	years		2,485
Trade names		725	2.7	years		644
Non-compete agreements		486	1.2	years		421
Patents		475	11.0	years		145
Other		235	3.0	years		235
Total	$	25,515			$	9,834

Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2013

Balance Sheet Components [Abstract]

Summary Of Property And Equipment

Property and equipment is summarized as follows:



	March 31, 2013		December 31, 2012
Computer equipment and software	$	40,952	$	38,649
Furniture, equipment and building improvements		7,245		6,834
		48,197		45,483
Less accumulated depreciation		30,038		27,988
Total	$	18,159	$	17,495

Accrued Expenses

Accrued expenses consist of the following:



	March 31, 2013		December 31, 2012
Payroll and other employee related costs	$	6,236	$	9,199
Professional services and consulting and other vendor fees		6,146		5,698
Sales commissions		1,394		490
Contingent earnout (Note 3)		1,660		1,660
Other		778		864
Total	$	16,214	$	17,911

Acquisitions (Tables)

3 Months Ended

Mar. 31, 2013

Look.IO [Member]

Business Acquisition [Line Items]

Purchase Price Preliminary Allocation

Management’s allocation of the purchase price in connection with the Look.io acquisition is as follows:



Intangible assets (technology)	$	767
Goodwill		2,405
		3,172
Deferred tax liability		(288)
Total purchase price consideration	$	2,884

Engage Pty Ltd. [Member]

Business Acquisition [Line Items]

Purchase Price Preliminary Allocation

Management’s preliminary allocation of the purchase price in connection with the Engage acquisition is as follows:



Cash	$	386
Accounts Receivable		3,454
Other Current Assets		57
Property and equipment		432
Other Assets		104
Intangible assets		3,600
Goodwill		6,152
		14,185
Liabilities Assumed		(2,632)
Deferred tax liability		(962)
Total purchase price consideration	$	10,591

Components Of Intangible Assets

The components of the intangible assets listed in the above table are as follows:



	Weighted Average Useful Life (Months)		Amount
Technology	36	$	768
Trade-name	12		95
Customer relationships	48		2,661
Non-compete agreements	12		76
		$	3,600

Summary Of Operations And Significant Accounting Policies (Narrative) (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2013 USD ($) segment $ / shares shares	Mar. 31, 2012 USD ($) $ / shares shares	Jun. 30, 2010 shares	Mar. 31, 2000 shares
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Typical service agreements	12 months
Fees and related labor costs, recognition period (current estimate of term of customer relationship)	48 months
Weighted average fair value of stock options granted \| $ / shares	$ 6.68	$ 6.55
Stock option term	10 years
Total value of stock options exercised	$ 778
Total intrinsic value of options exercisable	24,070
Total intrinsic value of nonvested options	8,902
Total intrinsic value of all outstanding options	$ 32,972
Effect of option to purchase share of common stock on diluted net income per share \| shares	3,626,240	4,509,618
Weighted average exercise price of options \| $ / shares		$ 5.37
Number of operating segments \| segment	2
Aggregate amortization expense for intangible assets	$ 418	$ 77
Estimated amortization expense in 2013	3,263
Estimated amortization expense in 2014	4,134
Estimated amortization expense in 2015	3,772
Estimated amortization expense in 2016	3,313
Estimated amortization expense in 2017	718
Estimated amortization expenses thereafter 2017	$ 113
Minimum
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Typical service agreements termination notice period	30 days
Maximum
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Typical service agreements termination notice period	90 days
Two Thousand Employee Stock Purchase Plan
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Shares of common stock available for issuance \| shares				450,000
Shares of common stock available for issuance, expiration date	Apr. 01, 2010
Employee Stock Purchase Plan, 2010
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Shares of common stock available for issuance \| shares	818,000		1,000,000
Incentive Stock Option
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Shares of common stock available for issuance \| shares	23,817,744
Unrecognized compensation cost related to nonvested share-based compensation arrangements	$ 37,282
Weighted average recognition period of unrecognized compensation cost	2 years
Incentive Stock Option \| Nineteen Ninety Eight Plan \| Maximum
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Shares of common stock available for issuance \| shares	5,850,000
Incentive Stock Option \| Two Thousand Plan
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Increase in number of shares of common stock available for issuance \| shares	4,150,000
Incentive Stock Option \| Nineteen Ninety Eight and Two Thousand Plan
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Shares of common stock available for issuance \| shares	10,000,000
Incentive Stock Option \| Two Thousand Nine Plan
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Shares of common stock available for issuance \| shares	15,300,000
Increase in number of shares of common stock available for issuance \| shares	6,000,000
Incentive Stock Option \| Two Thousand Nine Plan \| 2009 Plan
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Increase in number of shares of common stock available for issuance \| shares	4,250,000

Summary Of Operations And Significant Accounting Policies (Summary Of Stock-Based Compensation Expense Related To Employee Stock Options) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Sep. 30, 2012	Mar. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 3,051		$ 2,155
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	420		314
Product development expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	870		609
Sales and marketing expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	746		552
General and Administrative Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,015		$ 680

Summary Of Operations And Significant Accounting Policies (Weighted Average Assumptions Of Fair Value Options Using Black-Scholes Option-Pricing Mode)l (Details)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Summary Of Operations And Significant Accounting Policies [Abstract]
Dividend yield	0.00%	0.00%
Risk-free interest rate, minimum		0.81%
Risk-free interest rate, maximum		0.87%
Risk-free interest rate	0.88%
Expected life (in years)	5 years	5 years
Historical volatility, minimum		60.29%
Historical volatility, maximum		60.81%
Historical volatility	58.65%

Summary Of Operations And Significant Accounting Policies (Summary Of Stock Option Activity And Weighted Average Exercise Prices) (Details)	3 Months Ended
	Mar. 31, 2013 $ / shares shares
Options
Options outstanding at December 31, 2012 \| shares	9,841,479
Options granted \| shares	310,300
Options exercised \| shares	(124,943)
Options cancelled \| shares	(243,793)
Options outstanding at March 31, 2013 \| shares	9,783,043
Options exercisable at March 31,2013 \| shares	3,494,350
Weighted Average Exercise Price
Options outstanding at December 31, 2013 \| $ / shares	$ 11.06
Options granted \| $ / shares	13.37
Options exercised \| $ / shares	7.76
Options cancelled \| $ / shares	13.92
Options outstanding at March 31, 2013 \| $ / shares	11.11
Options exercisable at March 31,2013 \| $ / shares	$ 6.62

Summary Of Operations And Significant Accounting Policies (Summary Of Status Of Nonvested Shares) (Details)	3 Months Ended
	Mar. 31, 2013 $ / shares shares
Shares
Nonvested Shares at December 31, 2012 \| shares	6,621,251
Granted \| shares	310,300
Vested \| shares	(399,065)
Forfeited \| shares	(243,793)
Nonvested Shares at March 31, 2013 \| shares	6,288,693
Weighted Average Grant-Date Fair Value
Nonvested Shares at December 31, 2012 \| $ / shares	$ 6.84
Granted \| $ / shares	6.68
Vested \| $ / shares	3.81
Cancelled \| $ / shares	7.16
Nonvested Shares at March 31, 2013 \| $ / shares	$ 7.00

Summary Of Operations And Significant Accounting Policies (Reconciliation Of Shares Used In Calculating Basic And Diluted Earnings Per Share) (Details) - shares	3 Months Ended
	Mar. 31, 2013	Sep. 30, 2012	Mar. 31, 2012
Summary Of Operations And Significant Accounting Policies [Abstract]
Basic	55,864,045		54,419,498
Effect of assumed exercised options			1,970,231
Diluted	55,864,045		56,389,729

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References + Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Weighted-Average Number of Common Shares Outstanding
-URI http://asc.fasb.org/extlink&oid=6528421

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Summary Of Operations And Significant Accounting Policies (Summary Of Financial Information By Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Hosted services - Business	$ 36,144	$ 31,240
Hosted services - Consumer	3,620	3,848
Professional services	2,732	1,671
Total revenue	42,496	36,759
Cost of revenue	10,134	7,923
Sales and marketing	14,478	11,089
Amortization of intangibles	224	77
Unallocated corporate expenses	18,259	12,782
(Loss) income from operations	(599)	4,888
Corporate
Segment Reporting Information [Line Items]
Hosted services - Business
Hosted services - Consumer
Professional services
Total revenue
Cost of revenue
Sales and marketing
Amortization of intangibles
Unallocated corporate expenses	18,259	12,782
(Loss) income from operations	(18,259)	(12,782)
Business
Segment Reporting Information [Line Items]
Hosted services - Business	36,144	31,240
Hosted services - Consumer
Professional services	2,732	1,671
Total revenue	38,876	32,911
Cost of revenue	9,536	7,368
Sales and marketing	13,206	9,489
Amortization of intangibles	224	77
Unallocated corporate expenses
(Loss) income from operations	15,910	15,977
Consumer
Segment Reporting Information [Line Items]
Hosted services - Business
Hosted services - Consumer	3,620	3,848
Professional services
Total revenue	3,620	3,848
Cost of revenue	598	555
Sales and marketing	1,272	1,600
Amortization of intangibles
Unallocated corporate expenses
(Loss) income from operations	$ 1,750	$ 1,693

Summary Of Operations And Significant Accounting Policies (Revenues Attributable To Domestic And Foreign Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Revenue	$ 42,496	$ 36,759
United States
Segment Reporting Information [Line Items]
Revenue	30,085	28,156
United Kingdom
Segment Reporting Information [Line Items]
Revenue	6,984	4,876
Other Countries
Segment Reporting Information [Line Items]
Revenue	$ 5,427	$ 3,727

Summary Of Operations And Significant Accounting Policies (Long-Lived Assets By Geographic Region) (Details) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Total long-lived assets	$ 72,592	$ 72,422
United States
Segment Reporting Information [Line Items]
Total long-lived assets	35,445	35,711
Israel
Segment Reporting Information [Line Items]
Total long-lived assets	24,213	23,750
Australia
Segment Reporting Information [Line Items]
Total long-lived assets	10,437	10,361
United Kingdom
Segment Reporting Information [Line Items]
Total long-lived assets	$ 2,497	$ 2,600

Summary Of Operations And Significant Accounting Policies (Changes In Carrying Amount Of Goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Nov. 09, 2012	Jun. 13, 2012
Goodwill [Line Items]
Beginning Balance	$ 32,645	$ 24,090
Engage acquisition (see Note 3)	79
Contingent earnout payments (see Note 3)		77
Ending Balance	32,724	32,645
Engage Pty Ltd. [Member]
Goodwill [Line Items]
Goodwill		6,073	$ 6,152
Look.IO [Member]
Goodwill [Line Items]
Goodwill		2,405		$ 2,405
Business
Goodwill [Line Items]
Beginning Balance	24,621	16,066
Engage acquisition (see Note 3)	79
Contingent earnout payments (see Note 3)		77
Ending Balance	24,700	24,621
Business \| Engage Pty Ltd. [Member]
Goodwill [Line Items]
Goodwill		6,073
Business \| Look.IO [Member]
Goodwill [Line Items]
Goodwill		2,405
Consumer
Goodwill [Line Items]
Beginning Balance	8,024	8,024
Ending Balance	$ 8,024	$ 8,024

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 72
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-Clause 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph l
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Summary Of Operations And Significant Accounting Policies (Summary Of Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 25,565	$ 25,515
Accumulated Amortization	10,252	9,834
Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 18,533	$ 18,533
Weighted Average Amortization Period	3 years 9 months 18 days	3 years 9 months 18 days
Accumulated Amortization	$ 6,099	$ 5,904
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 5,061	$ 5,061
Weighted Average Amortization Period	3 years 6 months	3 years 6 months
Accumulated Amortization	$ 2,650	$ 2,485
Trade-Name [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 725	$ 725
Weighted Average Amortization Period	2 years 8 months 12 days	2 years 8 months 12 days
Accumulated Amortization	$ 668	$ 644
Non-compete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 486	$ 486
Weighted Average Amortization Period	1 year 2 months 12 days	1 year 2 months 12 days
Accumulated Amortization	$ 440	$ 421
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 475	$ 475
Weighted Average Amortization Period	11 years	11 years
Accumulated Amortization	$ 156	$ 145
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 285	$ 235
Weighted Average Amortization Period	3 years	3 years
Accumulated Amortization	$ 239	$ 235

Balance Sheet Components (Summary Of Property And Equipment) (Details) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 48,197	$ 45,483
Less accumulated depreciation	30,038	27,988
Total	18,159	17,495
Computer Equipment And Software
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	40,952	38,649
Furniture, Equipment and Building Improvements
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 7,245	$ 6,834

- Definition

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References + Details

Balance Sheet Components (Accrued Expenses) (Details) - USD ($) $ in Thousands	Mar. 31, 2013	Dec. 31, 2012
Balance Sheet Components [Abstract]
Payroll and other employee related costs	$ 6,236	$ 9,199
Professional services and consulting and other vendor fees	6,146	5,698
Sales commissions	1,394	490
Contingent earnout (Note 3)	1,660	1,660
Other	778	864
Total	$ 16,214	$ 17,911

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References + Details

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for sales commissions. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References + Details

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References + Details

Acquisitions (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
Acquisitions (Narrative) (Details) - USD ($) $ in Thousands	Jun. 13, 2012	Mar. 31, 2013	Dec. 31, 2012	Nov. 09, 2012	May 31, 2012
Business Acquisition [Line Items]
Net working capital adjustment		$ 79
Amadesa Ltd. [Member]
Business Acquisition [Line Items]
Acquisition costs included in intangible assets		$ 497
Acquired intangible asset, aggregate cash consideration					$ 10,301
Business acquisition, acquisition Date		May 31, 2012
Look.IO [Member]
Business Acquisition [Line Items]
Business acquisition, shares of common stock issued	109,517
Business acquisition, value of shares of common stock issued	$ 1,984
Acquisition costs included in intangible assets	767
Business acquisition, purchase price cash	2,884
Acquisition costs incurred to acquire entity			$ 157
Business acquisition, acquisition Date		Jun. 13, 2012
Business acquisition, cash paid	$ 900
Weighted average shares outstanding used in basic and diluted net income per share as of the acquisition date			109,517
Potential shares of common stock in addition to purchase price	30,422
Potential shares of common stock, value		$ 551
Engage Pty Ltd. [Member]
Business Acquisition [Line Items]
Acquisition costs included in intangible assets				$ 3,600
Business acquisition, purchase price cash				10,591
Acquisition costs incurred to acquire entity			$ 494
Business acquisition, acquisition Date		Nov. 09, 2012
Potential shares of common stock, value				1,660
Assets acquired liabilities assumed, net				$ 839

Acquisitions (Purchase Price Preliminary Allocation) (Details) - USD ($) $ in Thousands	Dec. 31, 2012	Nov. 09, 2012	Jun. 13, 2012
Look.IO [Member]
Business Acquisition [Line Items]
Intangible assets			$ 767
Goodwill	$ 2,405		2,405
Total assets acquired			3,172
Deferred tax liability			(288)
Total purchas price consideration			$ 2,884
Engage Pty Ltd. [Member]
Business Acquisition [Line Items]
Cash		$ 386
Accounts Receivable		3,454
Other Current Assets		57
Property and equipment		432
Other Assets		104
Intangible assets		3,600
Goodwill	$ 6,073	6,152
Total assets acquired		14,185
Liabilities assumed		(2,632)
Deferred tax liability		(962)
Total purchas price consideration		$ 10,591

Acquisitions (Components Of Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Nov. 09, 2012
Engage Pty Ltd. [Member]
Business Acquisition [Line Items]
Intangible assets			$ 3,600
Customer Relationships
Business Acquisition [Line Items]
Weighted Average Amortization Period	3 years 6 months	3 years 6 months
Customer Relationships [Member] \| Engage Pty Ltd. [Member]
Business Acquisition [Line Items]
Intangible assets	$ 2,661
Weighted Average Amortization Period	48 months
Non-compete Agreements [Member]
Business Acquisition [Line Items]
Weighted Average Amortization Period	1 year 2 months 12 days	1 year 2 months 12 days
Non-compete Agreements [Member] \| Engage Pty Ltd. [Member]
Business Acquisition [Line Items]
Intangible assets	$ 76
Weighted Average Amortization Period	12 months
Patents
Business Acquisition [Line Items]
Weighted Average Amortization Period	11 years	11 years
Trade-Name [Member]
Business Acquisition [Line Items]
Weighted Average Amortization Period	2 years 8 months 12 days	2 years 8 months 12 days
Trade-Name [Member] \| Engage Pty Ltd. [Member]
Business Acquisition [Line Items]
Intangible assets	$ 95
Weighted Average Amortization Period	12 months
Other
Business Acquisition [Line Items]
Weighted Average Amortization Period	3 years	3 years
Technology [Member]
Business Acquisition [Line Items]
Weighted Average Amortization Period	3 years 9 months 18 days	3 years 9 months 18 days
Technology [Member] \| Engage Pty Ltd. [Member]
Business Acquisition [Line Items]
Intangible assets	$ 768
Weighted Average Amortization Period	36 months

Commitments And Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Commitments and Contingencies [Line Items]
Rental expense for operating leases	$ 2,501	$ 1,599
Defined benefit plan employer matching contribution on first five percent of employee compensation	50.00%
Defined benefit plan employer contribution limit	$ 6
Defined benefit plan employer contribution vesting period	5 years
Maximum
Commitments and Contingencies [Line Items]
Percentage of employees' eligible compensation for employer matching contribution	5.00%
Salaries And Related Expenses
Commitments and Contingencies [Line Items]
Defined benefit plan employer contribution	$ 226	$ 167