Vocus 10-K 7 Mar 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Feb. 28, 2014	Jun. 30, 2013
Document And Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Entity Registrant Name	'Vocus, Inc.	'	'
Entity Central Index Key	'0001329919	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Filer Category	'Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	21,621,817	'
Entity Public Float	'	'	$207,237,635

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$34,740	$32,107
Short-term investments	'	662
Accounts receivable, net of allowance for doubtful accounts of $236 and $234 at December 31, 2012 and December 31, 2013, respectively	28,862	29,841
Current portion of deferred income taxes	271	1,478
Prepaid expenses and other current assets	4,728	2,933
Total current assets	68,601	67,021
Long-term investments	'	1,322
Property, equipment and software, net	20,134	20,068
Intangible assets, net	14,805	26,751
Goodwill	177,264	177,011
Deferred income taxes, net of current portion	105	'
Other assets	471	641
Total assets	281,380	292,814
Current liabilities:	'	'
Accounts payable	1,004	4,125
Accrued compensation	5,895	5,443
Accrued expenses	8,900	12,133
Current portion of notes payable and capital lease obligations	137	854
Current portion of deferred revenue	81,675	77,098
Total current liabilities	97,611	99,653
Notes payable and capital lease obligations, net of current portion	1,218	751
Other liabilities	6,371	6,786
Deferred income taxes	4,546	5,120
Deferred revenue, net of current portion	2,842	2,235
Total liabilities	112,588	114,545
Commitments and contingencies	'	'
Stockholders' equity:	'	'
Preferred stock, $0.01 par value, 10,000,000 shares authorized; 1,000,000 shares designated as Series A redeemable convertible preferred stock and issued and outstanding at December 31, 2012 and December 31, 2013; no other shares issued and outstanding at December 31, 2013	'	'
Common stock, $0.01 par value, 90,000,000 shares authorized; 21,910,301 and 21,949,509 issued at December 31, 2012 and December 31, 2013, respectively; 19,670,168 and 20,207,652 shares outstanding at December 31, 2012 and December 31, 2013, respectively	219	219
Additional paid-in capital	227,699	215,226
Treasury stock, 2,240,133 and 1,741,858 shares at December 31, 2012 and December 31, 2013, respectively, at cost	-42,320	-41,909
Accumulated other comprehensive loss	-159	-426
Accumulated deficit	-94,137	-72,331
Total stockholders' equity	91,302	100,779
Total liabilities, redeemable convertible preferred stock and stockholders' equity	281,380	292,814
Series A Redeemable Convertible Preferred Stock [Member]	'	'
Redeemable convertible preferred stock:	'	'
Series A redeemable convertible preferred stock, $0.01 par value, 1,000,000 shares designated from authorized preferred stock; issued and outstanding at December 31, 2012 and December 31, 2013	$77,490	$77,490

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Allowance for doubtful accounts	$234	$236
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	'	'
Preferred stock, shares outstanding	'	'
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	21,949,509	21,910,301
Common stock, shares outstanding	20,207,652	19,670,168
Treasury stock, shares	1,741,858	2,240,133
Series A Redeemable Convertible Preferred Stock [Member]	'	'
Series A redeemable convertible preferred stock, par value	$0.01	$0.01
Series A redeemable convertible preferred stock, shares designated	1,000,000	1,000,000
Series A redeemable convertible preferred stock, shares issued	1,000,000	1,000,000
Series A redeemable convertible preferred stock, shares outstanding	1,000,000	1,000,000

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]	'	'	'
Revenues	$186,931	$170,804	$114,874
Cost of revenues	38,220	33,749	21,857
Gross profit	148,711	137,055	93,017
Operating expenses:	'	'	'
Sales and marketing	109,768	97,873	57,543
Research and development	10,649	13,272	7,561
General and administrative	40,753	40,651	30,129
Amortization of intangible assets	7,841	7,157	2,021
Total operating expenses	169,011	158,953	97,254
Loss from operations	-20,300	-21,898	-4,237
Other income (expense):	'	'	'
Interest and other income (expense)	-156	-41	317
Interest expense	-145	-225	-38
Total other income (expense)	-301	-266	279
Loss before provision for income taxes	-20,601	-22,164	-3,958
Provision for income taxes	1,205	1,427	10,619
Net loss	($21,806)	($23,591)	($14,577)
Net loss per share:	'	'	'
Basic	($1.09)	($1.21)	($0.78)
Diluted	($1.09)	($1.21)	($0.78)
Weighted average shares outstanding used in computing per share amounts:	'	'	'
Basic	20,058,231	19,437,076	18,743,305
Diluted	20,058,231	19,437,076	18,743,305

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Loss) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement Of Income And Comprehensive Income [Abstract]	'	'	'
Net loss	($21,806)	($23,591)	($14,577)
Other comprehensive income (loss), net of taxes:	'	'	'
Foreign currency translation adjustment	269	189	-442
Unrealized net gain (loss) on available-for-sale investments, net of taxes	-2	-8	10
Other comprehensive income (loss), net of taxes	267	181	-432
Comprehensive loss	($21,539)	($23,410)	($15,009)

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]
In Thousands, except Share data
Beginning Balance at Dec. 31, 2010	$104,434	$204	$166,985	($28,417)	($175)	($34,163)
Beginning Balance, shares at Dec. 31, 2010	'	20,374,267	'	'	'	'
Exercise of stock options	18,952	12	18,940	'	'	'
Exercise of stock options, shares	'	1,219,643	'	'	'	'
Vesting of restricted stock awards	'	2	-2	'	'	'
Vesting of restricted stock awards, shares	'	156,615	'	'	'	'
Tax deficiency from equity awards	-586	'	-586	'	'	'
Repurchase of 978,709, 143,789 and 35,695 shares of common stock for years 2011, 2012 and 2013 respectively	-20,006	'	'	-20,006	'	'
Stock-based compensation	14,936	'	14,936	'	'	'
Net loss	-14,577	'	'	'	'	-14,577
Other comprehensive income (loss)	-432	'	'	'	-432	'
Ending Balance at Dec. 31, 2011	102,721	218	200,273	-48,423	-607	-48,740
Ending Balance, shares at Dec. 31, 2011	'	21,750,525	'	'	'	'
Exercise of stock options	72	'	72	'	'	'
Exercise of stock options, shares	'	10,391	'	'	'	'
Vesting of restricted stock awards	'	1	-1	'	'	'
Vesting of restricted stock awards, shares	'	149,385	'	'	'	'
Issuance of 401,672 and 4,882 shares of common stock from treasury shares for business acquisition for years 2012 and 2013	9,600	'	'	9,600	'	'
Tax deficiency from equity awards	-3	'	-3	'	'	'
Repurchase of 978,709, 143,789 and 35,695 shares of common stock for years 2011, 2012 and 2013 respectively	-3,086	'	'	-3,086	'	'
Stock-based compensation	14,885	'	14,885	'	'	'
Net loss	-23,591	'	'	'	'	-23,591
Other comprehensive income (loss)	181	'	'	'	181	'
Ending Balance at Dec. 31, 2012	100,779	219	215,226	-41,909	-426	-72,331
Ending Balance, shares at Dec. 31, 2012	21,910,301	21,910,301	'	'	'	'
Exercise of stock options	85	'	85	'	'	'
Exercise of stock options, shares	11,583	11,583	'	'	'	'
Vesting of restricted stock awards	'	'	'	'	'	'
Vesting of restricted stock awards, shares	'	27,625	'	'	'	'
Issuance of 401,672 and 4,882 shares of common stock from treasury shares for business acquisition for years 2012 and 2013	66	'	'	66	'	'
Repurchase of 978,709, 143,789 and 35,695 shares of common stock for years 2011, 2012 and 2013 respectively	-477	'	'	-477	'	'
Stock-based compensation	12,388	'	12,388	'	'	'
Net loss	-21,806	'	'	'	'	-21,806
Other comprehensive income (loss)	267	'	'	'	267	'
Ending Balance at Dec. 31, 2013	$91,302	$219	$227,699	($42,320)	($159)	($94,137)
Ending Balance, shares at Dec. 31, 2013	21,949,509	21,949,509	'	'	'	'

Consolidated_Statements_of_Sto1

Consolidated Statements of Stockholders' Equity (Parenthetical)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Treasury stock reissued, shares	4,882	401,672	'
Repurchase of common stock shares	35,695	143,789	978,709
Treasury Stock [Member]	'	'	'
Treasury stock reissued, shares	4,882	401,672	'
Repurchase of common stock shares	35,695	143,789	978,709

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:	'	'	'
Net loss	($21,806)	($23,591)	($14,577)
Adjustments to reconcile net loss to net cash provided by operating activities:	'	'	'
Depreciation and amortization of property, equipment and software	5,501	4,844	2,655
Amortization of intangible assets	12,034	10,999	2,501
(Gain) loss on disposal of assets	-4	59	68
Impairment of long-lived assets	301	709	100
Stock-based compensation	12,327	14,872	14,915
Common stock issued for consulting services	'	482	'
Adjustments to fair value of contingent consideration	3,453	1,176	1,941
Provision for doubtful accounts	638	408	408
Deferred income taxes	505	835	9,789
Excess tax benefit from equity awards	'	'	-34
Payments of contingent consideration for business acquisitions in excess of fair value on acquisition date	-4,560	-2,435	-147
Changes in operating assets and liabilities:	'	'	'
Accounts receivable	439	-6,558	-3,081
Prepaid expenses and other current assets	-1,723	-307	1,910
Other assets	-231	-120	-230
Accounts payable	-3,130	2,005	66
Accrued compensation	421	353	337
Accrued expenses	-1,827	1,215	2,173
Deferred revenue	4,869	14,383	6,523
Other liabilities	-362	-504	5,827
Net cash provided by operating activities	6,845	18,825	31,144
Cash flows from investing activities:	'	'	'
Business acquisitions, net of cash acquired	'	-79,801	-6,947
Purchases of property, equipment and software	-5,193	-4,695	-13,758
Software development costs	-742	-360	-305
Proceeds from disposal of assets	8	5	14
Purchases of available-for-sale securities	'	-4,301	-22,907
Sales of available-for-sale securities	1,328	5,835	'
Maturities of available-for-sale securities	651	6,402	18,390
Net cash used in investing activities	-3,948	-76,915	-25,513
Cash flows from financing activities:	'	'	'
Repurchases of common stock	-477	-3,086	-20,006
Proceeds from exercises of stock options	85	73	18,952
Excess tax benefit from equity awards	'	'	34
Payments of contingent consideration for business acquisitions	'	-5,171	-1,289
Proceeds from notes payable	600	'	440
Payments on notes payable and capital lease obligations	-850	-204	-177
Net cash used in financing activities	-642	-8,388	-2,046
Effect of exchange rate changes on cash and cash equivalents	378	301	-219
Net increase (decrease) in cash and cash equivalents	2,633	-66,177	3,366
Cash and cash equivalents at beginning of year	32,107	98,284	94,918
Cash and cash equivalents at end of year	34,740	32,107	98,284
Supplemental disclosure of cash flow information:	'	'	'
Cash paid for interest	101	214	22
Cash paid for income taxes, net of refunds	-733	-399	-251
Supplemental disclosure of non-cash investing and financing activities:	'	'	'
Issuance of Series A redeemable convertible preferred stock in connection with acquisition	'	77,490	'
Issuance of common stock in connection with acquisition	'	9,118	'
Issuance of promissory note in connection with acquisition	'	669	'
Assets acquired under capital leases and other financing arrangements	'	$106	$440

Business_Description

Business Description	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Business Description	'
	1	Business Description
	Organization and Description of Business
	Vocus, Inc. (Vocus or the Company) is a provider of cloud marketing and public relations software that enables businesses to acquire and retain customers. The Company offers products and services to help customers attract and engage prospects, capture and keep customers and measure and improve marketing effectiveness. The Company’s integrated suites address the key areas of digital marketing and public relations, including social marketing, search marketing, email marketing and publicity. The Company is headquartered in Beltsville, Maryland with sales and other offices in the United States, Europe and Asia.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	2	Summary of Significant Accounting Policies
	Basis of Presentation
	The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) and include the accounts of Vocus, Inc. and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions. On an on-going basis, the Company evaluates its estimates, including, but not limited to, those related to the allowance for doubtful accounts, software development costs, useful lives of property, equipment and software, intangible assets and goodwill, contingent liabilities, self-insurance, revenue recognition, fair value of stock-based awards and income taxes, among others. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities as well as the reported amounts of revenues and expenses during the period. Actual results could differ from these estimates.
	Cash and Cash Equivalents
	The Company considers all highly liquid investments with original maturity dates of three months or less at the time of purchase to be cash equivalents.
	Investments
	Management determines the appropriate classification of investments at the time of purchase and evaluates such a determination as of each balance sheet date. The Company’s investments were classified as available-for-sale securities and were stated at fair value at December 31, 2012. There were no available-for-sale securities at December 31, 2013. Realized gains and losses are included in other income (expense) based on the specific identification method. Realized gains or losses for the years ended December 31, 2011, 2012, and 2013 were not material. Net unrealized gains and losses on available-for-sale securities are reported as a component of other comprehensive income (loss), net of tax. As of December 31, 2012, the net unrealized gains or losses on available-for-sale securities were not material. The Company regularly monitors and evaluates the fair value of its investments to identify other-than-temporary declines in value.
	Fair Value Measurements
	The Company measures certain financial assets at fair value pursuant to a fair value hierarchy based on inputs to valuation techniques that are used to measure fair value that are either observable or unobservable. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon its own market assumptions. The fair value hierarchy consists of the following three levels:
	Level 1		–	Inputs are quoted prices in active markets for identical assets or liabilities.
	Level 2		–	Inputs are quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable and market-corroborated inputs which are derived principally from or corroborated by observable market data.
	Level 3		–	Inputs are derived from valuation techniques in which one or more significant inputs or value drivers are unobservable.
	Allowance for Doubtful Accounts
	Estimates are used to determine the amount of the allowance for doubtful accounts necessary to reduce accounts receivable to the estimated net realizable value. These estimates are made by analyzing the status of significant past-due receivables and by establishing provisions for estimated losses by analyzing current and historical bad debt trends. Actual collection experience has not varied significantly from prior estimates.
	Software Development and Information Database Costs
	The Company incurs software development costs related to its cloud-based software. Qualifying costs incurred during the application development stage are capitalized. These costs primarily consist of internal labor and are amortized using the straight-line method over the estimated useful life of the software, which is generally two years. All other development costs are expensed as incurred. The Company capitalized the initial costs to acquire and develop its proprietary information database, which consists of media contacts and outlets and other relevant data integrated as part of the Company’s cloud-based solutions. These costs are amortized using the straight-line method over the estimated useful lives of nine to thirteen years. Costs to maintain and update the information database are expensed as cost of revenues as incurred. For the years ended December 31, 2011, 2012 and 2013, the Company recorded amortization expense of $581,000, $499,000 and $490,000, respectively.
	Property, Equipment and Software
	Property, equipment and software are stated at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the assets as follows: three to five years for purchased software and computer and office equipment and five to seven years for furniture and fixtures. Assets acquired under capital leases and leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful lives of the assets or the terms of the leases. Amortization of assets acquired under capital leases is included in depreciation expense. Repairs and maintenance costs are charged to expense as incurred. When assets are retired or otherwise disposed of, the asset and related accumulated depreciation are eliminated from the accounts and any resulting gain or loss is recorded in the results of operations.
	Long-Lived Assets
	Long-lived assets include property, equipment and software and intangible assets with finite lives. Intangible assets consist of customer relationships, trade names and purchased technology acquired in business combinations. Intangible assets are amortized using the straight-line method over their estimated useful lives ranging from two to seven years. Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be fully recoverable. If an impairment indicator is present, the Company evaluates recoverability by a comparison of the carrying amount of the assets to future undiscounted net cash flows expected to be generated by the assets. If the assets are impaired, the impairment recognized is measured by the amount by which the carrying amount exceeds the estimated fair value of the assets. Impairment charges for long-lived assets for the years ended December 31, 2011 and 2013 were $100,000 and $301,000, respectively. Impairment charges for long-lived assets for the year ended December 31, 2012 were $709,000, which primarily related to leasehold improvements no longer used.
	Business Combinations
	The Company has completed acquisitions of businesses that have resulted in the recording of goodwill and identifiable definite-lived intangible assets. The Company recognizes all of the assets acquired, liabilities assumed and contingent consideration at their fair values on the acquisition date. The Company uses significant estimates and assumptions, including fair value estimates, as of the acquisition date and refines those estimates that are provisional, as necessary, during the measurement period. The measurement period is the period after the acquisition date, not to exceed one year, in which new information may be gathered about facts and circumstances that existed as of the acquisition date to adjust the provisional amounts recognized. Measurement period adjustments are applied retrospectively. All other adjustments are recorded to the consolidated statements of operations. Acquisition-related costs are expensed as incurred separately from the acquisition and generally are included in general and administrative expenses in the consolidated statements of operations.
	Goodwill
	Goodwill represents the excess of the cost of an acquired entity over the net fair value of the identifiable assets acquired and liabilities assumed. Goodwill is not amortized, but rather is assessed for impairment at least annually. The Company performs its annual impairment assessment on November 1, or whenever events or circumstances indicate impairment may have occurred. The Company operates under one reporting unit, and as a result, evaluates goodwill impairment based on the fair value of the Company as a whole. When assessing goodwill for impairment, the Company uses an income approach based on discounted cash flows to determine the fair value of its reporting unit. The Company’s cash flow assumptions consider historical and forecasted revenue, operating costs and other relevant factors which are consistent with the plans used to manage the Company’s operations. Based on the results of the Company’s most recent annual assessment performed on November 1, 2013, the Company concluded that the fair value of its reporting unit exceeded its carrying amount. The Company also reviews the carrying amount of the reporting unit to its fair value based on quoted market prices of the Company’s common stock, or market capitalization. The market capitalization of the Company exceeded its carrying amount on November 1, 2013. No events or circumstances occurred from the date of the assessments through December 31, 2013 that would impact these conclusions.
	Foreign Currency and Operations
	The reporting currency for all periods presented is the U.S. dollar. The functional currency for the Company’s foreign subsidiaries is the local currency. The financial statements of these subsidiaries are translated into U.S. dollars using exchange rates in effect at the balance sheet date for assets and liabilities and average exchange rates during the period for revenues and expenses. The resulting translation adjustments are included in accumulated other comprehensive income (loss), a separate component of stockholders’ equity. Transaction gains and losses in currencies other than the functional currency are included in other income (expense) in the consolidated statements of operations. Amounts resulting from foreign currency transactions were not material for the years ended December 31, 2011, 2012 and 2013.
	Comprehensive Income (Loss)
	Comprehensive income (loss) includes the Company’s net income (loss) as well as other changes in stockholders’ equity that result from transactions and economic events other than those with stockholders. Other comprehensive income (loss) includes foreign currency translation adjustments and net unrealized gains and losses on investments classified as available-for-sale securities.
	Revenue Recognition
	The Company derives its revenues from subscription arrangements and related services permitting customers to access and utilize the Company’s cloud-based software. The Company also derives revenues from news distribution services sold separately from its subscription arrangements. The Company recognizes revenue when there is persuasive evidence of an arrangement, the service has been provided to the customer, the collection of the fee is probable and the amount of the fee to be paid by the customer is fixed or determinable. The Company allocates consideration to each deliverable in multiple element arrangements based on the relative selling prices and recognizes revenue as the respective services are delivered or performed.
	The Company’s separate units of accounting consist of its subscription services, news distribution services and professional services. These elements generally include access to the Company’s cloud-based software, hosting services, content and content updates and customer support. The Company’s subscription agreements typically are non-cancelable, though customers have the right to terminate their agreements for cause if the Company materially breaches its obligations under the agreement. Subscription agreements do not provide customers the right to take possession of the software at any time.
	The Company also distributes individual news releases to the Internet which are indexed by major search engines and distributed directly to various news sites, journalists and other key constituents. The Company recognizes revenue on a per-transaction basis when the press releases are made available to the public.
	The Company’s professional services primarily consist of data migration, custom development and training. The Company’s cloud-based software does not require significant modification and customization services.
	The Company established vendor-specific objective evidence (VSOE) of the fair value for the selling price for certain of its news distribution services as the selling price for a substantial majority of stand-alone sales fall within a narrow range around the median selling price. The Company determined third-party evidence (TPE) of selling price is not available for any of its services due to differences in the features and functionality compared to competitors’ products. Therefore, the Company uses its estimated selling prices (ESP) for the remaining deliverables by analyzing multiple factors such as historical pricing trends, discounting practices, gross margin objectives and other market conditions.
	Sales and other taxes collected from customers to be remitted to government authorities are excluded from revenues.
	Deferred Revenue
	Deferred revenue consists of payments received from or billings to customers in advance of revenue recognition. Deferred revenue to be recognized in the succeeding twelve month period is included in current deferred revenue with the remaining amounts included in non-current deferred revenue.
	Sales Commissions
	Sales commissions are expensed when a subscription agreement is executed by the customer.
	Advertising Costs
	The Company expenses advertising costs as incurred. Advertising costs for the years ended December 31, 2011, 2012 and 2013 were $8.9 million, $23.4 million and $22.7 million, respectively.
	Stock-Based Compensation
	The Company’s share-based arrangements include stock option awards and restricted stock awards. The Company recognizes compensation expense for its equity awards on a straight-line basis over the requisite service period of the award based on the estimated portion of the award that is expected to vest and applies estimated forfeiture rates based on analyses of historical data, including termination patterns and other factors. The Company uses the quoted closing market price of its common stock on the grant date to measure the fair value of restricted stock awards and the Black-Scholes option pricing model to measure the fair value of stock option awards. The Company uses the daily historical volatility of its stock price over the expected life of the options to calculate the expected volatility. The Company uses a combination of its historical exercise data with expected future exercise patterns using the average midpoint between vesting and the contractual term to determine the expected term of option awards. The risk-free interest rate is based on the rate on U.S. Treasury securities with maturities consistent with the estimated expected term of the awards. The Company has not paid dividends and does not anticipate paying a cash dividend in the foreseeable future and, accordingly, uses an expected dividend yield of zero.
	Concentrations of Credit Risk
	Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash and cash equivalents, investments and accounts receivable. The Company generally maintains its cash and cash equivalents with various nationally recognized financial institutions. Investments consisted of investment grade, interest bearing securities. Customers are granted credit on an unsecured basis. Management monitors the creditworthiness of its customers and believes that it has adequately provided for any exposure to potential credit losses.
	The Company provides cloud-based software and related services to various customers across several industries. As of December 31, 2012 and 2013, no individual customer accounted for 10% or more of net accounts receivable. For the years ended December 31, 2011, 2012 and 2013, no individual customer accounted for 10% or more of revenue. As of December 31, 2012 and 2013, assets located outside the United States were approximately 9% and 10% of total assets, respectively. Revenues from sales to customers outside the United States were approximately 16%, 11%, and 10% of total revenues for the years ended December 31, 2011, 2012 and 2013, respectively.
	Income Taxes
	Income taxes are determined utilizing the asset and liability method whereby deferred tax assets and liabilities are recognized for deductible temporary differences between the respective reported amounts and tax bases of assets and liabilities, as well as for operating loss and tax-credit carryforwards. Net deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized.
	Beginning in 2011, based on the operating results and the Company’s projections of future losses, the Company established a full valuation allowance on its U.S. federal and state net deferred tax assets because it was able to conclude that it is more likely than not that it will not realize the benefits of its deferred tax assets. The Company historically maintained a full valuation allowance on net deferred tax assets of certain of its foreign subsidiaries because it determined that it is more likely than not that it will not realize the benefits of its foreign deferred tax assets
	The Company’s estimates related to liabilities for uncertain tax positions require it to make judgments regarding the sustainability of each uncertain tax position based on its technical merits. If it determines it is more likely than not that a tax position will be sustained based on its technical merits, the Company records the impact of the position in its consolidated financial statements at the largest amount that is greater than fifty percent likely of being realized upon ultimate settlement. The estimates are updated at each reporting date based on the facts, circumstances and information available. The Company is also required to assess at each reporting date whether it is reasonably possible that any significant increases or decreases to its unrecognized tax benefits will occur during the next twelve months. The Company files income tax returns in the U.S. federal jurisdictions and various state and foreign jurisdictions and is subject to U.S. federal, state, and foreign tax examinations for years ranging from 2003 to 2013.
	Earnings Per Share
	Basic net income or loss per share attributable to common stockholders is computed by dividing net income or loss attributable to common stockholders by the weighted average number of common shares outstanding for the period. Nonvested shares of restricted stock are not included in the computation of basic net income per share until vested. The Company’s outstanding grants of restricted stock do not contain non-forfeitable dividend rights. Diluted net income per share attributable to common stockholders is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period. For purposes of this calculation, options to purchase common stock, nonvested shares of restricted stock and shares of redeemable convertible preferred stock are considered to be common stock equivalents.
	As the Company has issued shares of Series A redeemable convertible preferred stock that participate in dividends with the common stock, the Company is required to apply the two-class method to compute the net income per share attributable to common stockholders. In periods of sufficient earnings, the two-class method assumes an allocation of undistributed earnings to both participating stock classes.
	For the years ended December 2011, 2012 and 2013, the Company incurred net losses and, therefore, the effect of the Company’s outstanding stock options, nonvested shares of restricted stock and redeemable convertible preferred stock was not included in the calculation of diluted loss per share as the effect would be anti-dilutive. For the years ended December 31, 2011, 2012 and 2013, diluted earnings per share excluded the impact of 1,757,240, 2,555,943 and 3,205,153 outstanding stock options, respectively, and 1,282,323, 979,790 and 937,536 nonvested shares of restricted stock, respectively and for the years ended December 31, 2012 and 2013, 1,000,000 shares of Series A redeemable convertible preferred stock as the result would be anti-dilutive.
	Segment Data
	The Company’s chief operating decision maker manages the Company’s operations on a consolidated basis for purposes of assessing performance and making operating decisions. Accordingly, the Company reports on its business as one segment.

Business_Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2013
Business Combinations [Abstract]	'
Business Combinations	'
	3. Business Combinations
	Acquisition of iContact
	On February 24, 2012, the Company acquired all of the outstanding shares of capital stock of iContact Corporation (iContact), a privately-held provider of cloud-based email and social marketing software that enables organizations to create and publish professional-quality emails designed to engage, educate and retain customers. The acquisition of iContact added an email capability component to the Company’s cloud marketing suite. During the year ended December 31, 2012, the Company incurred acquisition-related transaction costs of $2.9 million, which are included in general and administrative expense in the consolidated statements of operations. During the year ended December 31, 2012, the Company incurred severance costs of $2.1 million, of which $52,000, $691,000, $637,000 and $691,000, were included in cost of revenues, sales and marketing, research and development and general and administrative expenses, respectively, in the consolidated statement of operations. All amounts were paid as of December 31, 2012. The acquisition was accounted for under the purchase method of accounting. The operating results of iContact are included in the accompanying consolidated financial statements from the date of acquisition.
	The purchase consideration consisted of the following (in thousands):
	Cash	$	89,801
	Note payable		669
	Common stock		9,118
	Series A redeemable convertible preferred stock		77,490
	Total purchase consideration	$	177,078
	The purchase price consisted of $90.5 million in cash, of which $669,000 was held back in the form of a promissory note, 406,554 shares of the Company’s common stock with a deemed value at issuance of $9.1 million and 1,000,000 shares of the Company’s newly-created Series A convertible preferred stock with a deemed value at issuance of $77.5 million, aggregating approximately $167.1 million of total consideration, net of $10.0 million cash acquired. For more information about the promissory note, please refer to Note 8, Debt, and for more information about the Series A redeemable convertible preferred stock, please refer to Note 9, Stockholders’ Equity. At the closing of the acquisition, a portion of the consideration, consisting of 72,656 shares of common stock, 85,090 shares of the Series A redeemable convertible preferred stock, $6.1 million in cash and the $669,000 promissory note, were deposited in escrow for a period of one year to satisfy potential indemnification claims by the Company against iContact with respect to breaches by iContact of its representations, warranties and covenants, or any post-closing purchase price adjustments or outstanding appraisal claims by iContact stockholders. All amounts were released from escrow in the first quarter of 2013.
	The purchase price was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The identifiable intangible assets include a trade name, customer relationships and purchased technology and are being amortized over three years on a straight-line basis. The Company, with the assistance of a third-party appraiser, assessed the fair value of these assets. The trade name and purchased technology were valued using the relief from royalty method and the customer relationships were valued using a discounted cash flow method. The relief from royalty method assesses the royalty savings an entity realizes since it owns the asset and does not have to pay a license fee to a third-party for its use. These methods require several judgments and assumptions to determine the fair value of the intangible assets including royalty rates, discount rates, customer attrition rates, useful lives of assets and expected levels of cash flows, earnings and revenues. The royalty rates used in the relief from royalty method ranged from 0.7% to 12% based on an analysis of market comparable rates. The discount rate used to estimate future cash flows was approximately 13%. The excess of the purchase price over the net tangible and identifiable intangible assets acquired was recorded as goodwill which is not deductible for tax purposes.
	The Company recognized a deferred tax asset in the amount of $20.3 million relating to acquired net operating losses, established a deferred tax liability of $14.0 million relating to the step up in basis of identifiable intangibles and property plant and equipment, and recorded a valuation allowance of $6.3 million. The Company determined that while the acquired net operating loss is subject to the limitation provided in Section 382 of the Internal Revenue Code, this limitation will not preclude the company from fully realizing the acquired net operating losses.
	Goodwill was primarily attributable to the assembled work force of iContact and the expected synergies resulting from the transaction.
	The purchase price as of the acquisition date was as follows (in thousands):
		Estimated			Estimated
		Useful Life			Fair Value
	Cash and cash equivalents				$	10,000
	Accounts receivable, net					96
	Prepaid and other current assets					478
	Property, equipment and software, net					2,625
	Trade name		3 years			1,400
	Customer relationships		3 years			19,166
	Purchased technology		3 years			12,041
	Goodwill					138,860
	Accounts payable and accrued liabilities					(5,911	)
	Deferred revenue					(1,645	)
	Other liabilities					(32	)
	Total purchase price				$	177,078
	The following unaudited pro forma consolidated results of operations for years ended December 31, 2011 and 2012 assumes that the iContact acquisition occurred at the beginning of 2011. The unaudited pro forma information combines the historical results for the Company with the historical results for iContact for the same period. The unaudited pro forma financial information for the years ended December 31, 2011 and 2012 includes adjustments for amortization of acquired intangible assets of $10.4 million and $1.5 million, respectively. The unaudited pro forma financial information for the year ended December 31, 2012 excludes acquisition-related transaction and severance costs of $5.0 million and the fair value adjustment for deferred revenue of $2.2 million. The following unaudited pro forma information is not intended to be indicative of future operating results (dollars in thousands, except per share data):
		Year Ended December 31,
		2011			2012
	Pro forma revenues	$	162,743		$	180,403
	Pro forma net loss	$	(30,883	)	$	(19,279	)
	Pro forma net loss per share:
	Basic and diluted	$	(1.61	)	$	(0.99	)
	The Company recognized revenue and incurred a net loss from iContact of $41.4 million and $4.5 million, respectively, since the date of acquisition through December 31, 2012.
	Acquisition of North Social
	On February 24, 2011, the Company acquired substantially all of the assets and assumed certain liabilities of North Venture Partners, LLC (North Social), a provider of Facebook applications that enable users to create, manage and promote their business on Facebook. The acquisition of North Social broadened the Company’s social media solution. The acquisition was accounted for under the purchase method of accounting. The operating results of North Social are included in the accompanying consolidated financial statements from the date of acquisition.
	The purchase consideration at the acquisition date consisted of approximately $7.0 million in cash and $5.1 million of contingent cash consideration for the achievement of certain financial milestones within the following 24 months. In 2012 and 2013, the Company paid $7.0 million and $4.6 million, respectively of contingent consideration for the achievement of certain financial milestones. The Company recorded approximately $101,000 of identifiable intangible assets, $11.9 million of goodwill that is deductible for tax purposes, and $78,000 of other net tangible assets. Goodwill was primarily attributable to North Social’s knowledge of applications for Facebook and the opportunity to expand into the rapidly growing social media market. Acquisition-related costs associated with the acquisition were not material. For more information about the contingent consideration for the acquisition of North Social, please refer to Note 5, Fair Value Measurements.

Cash_Equivalents_and_Investmen

Cash Equivalents and Investments	12 Months Ended
	Dec. 31, 2013
Cash And Cash Equivalents [Abstract]	'
Cash Equivalents and Investments	'
	4	Cash Equivalents and Investments
	The components of cash equivalents and investments at December 31, 2012 were as follows (in thousands):
					Unrealized				Fair
									Market
			Cost		Gains		Losses		Value
	Cash equivalents:
	Money market funds		$	11,290	$	—	$	—	$	11,290
	Certificates of deposit			1,322		—		—		1,322
	Short-term investments:
	Certificates of deposit			660		2		—		662
	Long-term investments:
	Certificates of deposit			1,322		—		—		1,322
	Total		$	14,594	$	2	$	—	$	14,596
	The components of cash equivalents and investments at December 31, 2013 were as follows (in thousands):
					Unrealized				Fair
									Market
			Cost		Gains		Losses		Value
	Cash equivalents:
	Money market funds		$	5,302	$	—	$	—	$	5,302
	Certificates of deposit			6,907		—		—		6,907
	Total		$	12,209	$	—	$	—	$	12,209
	Cash equivalents have original maturity dates of three months or less. Short-term investments have original maturity dates greater than three months but less than one year. Long-term investments have original maturity dates between one and five years.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	5. Fair Value Measurements
	The fair value measurements of the Company’s financial assets and liabilities measured on a recurring basis at December 31, 2012 were as follows (in thousands):
		Total			Level 1			Level 2		Level 3
	Assets:
	Cash equivalents	$	12,612		$	12,612		$	—	$	—
	Short-term investments		662			662			—		—
	Long-term investments		1,322			1,322			—		—
	Total assets measured at fair value	$	14,596		$	14,596		$	—	$	—
	Liabilities:
	Accrued expenses:
	Accrued contingent consideration, current portion	$	1,107		$	—		$	—	$	1,107
	Total liabilities measured at fair value	$	1,107		$	—		$	—	$	1,107
	The fair value measurements of the Company’s financial assets and liabilities measured on a recurring basis at December 31, 2013 were as follows (in thousands):
		Total			Level 1			Level 2		Level 3
	Assets:
	Cash equivalents	$	12,209		$	12,209		$	—	$	—
	Total assets measured at fair value	$	12,209		$	12,209		$	—	$	—
	Cash equivalents and short-term investments are classified within Level 1 of the fair value hierarchy since they are valued using quoted market prices or alternative pricing sources that utilize market observable inputs.
	The Company had incurred contingent consideration liabilities in connection with its business acquisitions in 2010 and 2011. Contingent consideration liabilities were classified as Level 3 of the fair value hierarchy since they were valued using unobservable inputs. The contingent consideration liability represented the estimated fair value of the additional cash consideration payable that was contingent upon the achievement of certain financial and performance milestones through respective target dates in 2011 through 2013. The fair value of this Level 3 liability was estimated based on a discounted probability-weighted income approach derived from revenue and earnings estimates and a probability assessment with respect to the likelihood of achieving the milestone criteria. Increases or decreases in the probability of achievement of these certain financial and performance milestones resulted in changes to the estimated fair value. The additional expense of $1.9 million, $1.2 million and $3.5 million was included in general and administrative expenses in the consolidated statements of operations for the years ended December 31, 2011, 2012, and 2013, respectively. During 2013, the fair value of the contingent consideration was adjusted based on the final earn-out calculations which were impacted by higher revenues in the first quarter of 2013 resulting from the increase in the number of North Social subscription customers due to additional marketing efforts near the conclusion of the earn-out period. The remaining liability for contingent consideration was paid in the second quarter of 2013.
	The changes in the fair value of the Company’s acquisition related contingent consideration for the years ended December 31, 2012 and 2013, were as follows (in thousands):
		December 31,
		2012			2013
	Balance as of beginning of period	$	7,537		$	1,107
	Adjustments to fair value measurements		1,176			3,453
	Payment of contingent consideration		(7,606	)		(4,560	)
	Balance as of end of period	$	1,107		$	—

Property_Equipment_and_Softwar

Property, Equipment and Software	12 Months Ended
	Dec. 31, 2013
Property Plant And Equipment [Abstract]	'
Property, Equipment and Software	'
	6. Property, Equipment and Software
	Property, equipment and software consisted of the following (in thousands):
		December 31,
		2012			2013
	Purchased software, computer and office equipment	$	12,539		$	14,397
	Furniture and fixtures		2,030			2,397
	Leasehold improvements		11,499			13,471
	Equipment under capital lease obligations		569			560
	Capitalized software development costs		1,960			2,762
	Information database costs		2,839			2,839
			31,436			36,426
	Less accumulated depreciation and amortization		(11,368	)		(16,292	)
	Property, equipment and software, net	$	20,068		$	20,134
	Depreciation and amortization expense, including depreciation on equipment under capital leases, was $2.7 million, $4.8 million and $5.5 million for the years ended December 31, 2011, 2012 and 2013, respectively.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	7	Goodwill and Intangible Assets
	The changes in the carrying amount of goodwill for the years ended December 31, 2012 and 2013 were as follows (in thousands):
			December 31,
			2012		2013
	Balance as of beginning of period		$	38,029	$	177,011
	Goodwill acquired			138,860		—
	Effects of foreign currency translation			122		253
	Balance as of end of period		$	177,011	$	177,264
	Intangible assets at December 31, 2012 consisted of the following (in thousands):
			Weighted-Average		Gross		Amortization			Net Carrying
			Amortization		Carrying					Amount
			Period		Amount
	Customer relationships			3.7	$	23,221	$	(7,014	)	$	16,207
	Trade names			5.9		5,686		(4,192	)		1,494
	Purchased technology			3.1		13,460		(4,410	)		9,050
	Total				$	42,367	$	(15,616	)	$	26,751
	Intangible assets at December 31, 2013 consisted of the following (in thousands):
			Weighted-Average		Gross		Amortization			Net Carrying
			Amortization		Carrying					Amount
			Period		Amount
	Customer relationships			3.7	$	23,376	$	(14,074	)	$	9,302
	Trade names			5.9		5,695		(5,058	)		637
	Purchased technology			3.1		13,496		(8,630	)		4,866
	Total				$	42,567	$	(27,762	)	$	14,805
	The Company’s goodwill and intangible assets for certain of its foreign subsidiaries are recorded in their functional currency, which is their local currency, and therefore are subject to foreign currency translation adjustments.
	Amortization expense of intangible assets for the years ended December 31, 2011, 2012 and 2013 was $2.5 million, $11.0 million and $12.0 million, respectively. Future expected amortization of intangible assets at December 31, 2013 was as follows (in thousands):
	2014		$	11,720
	2015			2,352
	2016			575
	2017			158
	Total		$	14,805

Debt

Debt	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Debt	'
	8.Debt
	Term Loans
	The Company entered into loan agreements with the State of Maryland in the amounts of $400,000 in 2011 and $500,000 in 2013 with terms ending on December 31, 2020 and with Prince George’s County in the amounts of $40,000 in 2011 with a term ending on December 31, 2020 and $100,000 in 2013 with a term ending on December 31, 2016. The proceeds of the loans were used in the initial renovation and further expansion of its corporate headquarters in Beltsville, Maryland. The borrowings bear interest at 3.0%. The conditions of the loans stipulate that principal and related accrued interest be forgiven if specified employment levels are achieved and maintained and the Company maintains the Beltsville, Maryland location as the corporate headquarters through the end of the loans. As of December 31, 2013, the Company has met the conditions of the loans, however, the conditions are required to be met throughout the term of the loan and, as such, the loans are recorded as long-term liabilities. The outstanding balance of these loans was $1.0 million and is included in notes payable and capital lease obligations, net of current portion. The related accrued interest is included in other liabilities, but was not material as of December 31, 2012 and 2013.
	Notes Payable
	A portion of the purchase consideration for the acquisition of iContact was held back in the form of a promissory note (Escrow Note) in the amount of $669,000. The Escrow Note accrued interest at a rate of 1% per annum and was held in escrow until payment in 2013. As of December 31, 2012 outstanding borrowings were $669,000. The Escrow note and related accrued interest were paid in full in February 2013.
	Revolving Credit Facility
	On February 27, 2012, the Company established a $15.0 million revolving credit facility (Revolver) with a major lending institution which was originally available for use until February 27, 2013. In February 2013, the Revolver was amended to extend the availability for use until April 15, 2014. The Revolver is intended to be used for general working capital purposes and to provide increased liquidity and financial flexibility and bears interest equal to the BBA LIBOR Daily Floating Rate plus 2.25%. In addition, the Company pays a monthly fee equal to 0.4% on any unused funds under the revolving facility. As collateral for extension of credit under the facility, the Company and certain of its subsidiaries granted security interests in favor of the institution of substantially all of their assets, and the Company pledged the stock of its directly owned domestic subsidiaries and 65% of the shares of its foreign subsidiaries. As of December 31, 2013, there were no outstanding borrowings, however, the, facility was reduced by the Company’s outstanding letters of credit of $1.3 million. As such, the Company had $13.7 million available to borrow under the Revolver.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2013
Equity [Abstract]	'
Stockholders' Equity	'
	9. Stockholders’ Equity
	Preferred Stock
	The Company’s Certificate of Incorporation authorizes 10,000,000 undesignated shares of preferred stock. The Company’s Board of Directors (Board) is authorized to establish one or more classes or series from the undesignated shares, to designate each share or class or series, and to fix the relative rights and preferences of each class or series, which rights and preferences may be superior to those of any of the common shares. In February 2012, the Board designated 1,000,000 shares of the Company’s authorized preferred stock as Series A convertible preferred stock in connection with the acquisition of iContact. On February 24, 2012, the Company issued 1,000,000 shares of Series A Redeemable Convertible Preferred Stock (Series A Preferred Stock). In May 2013, the Board designated 100,000 shares of the Company’s authorized preferred stock as Series B Junior Participating Preferred Stock (Series B Preferred Stock), however, no shares of Series B Preferred Stock are issued and outstanding.
	Series A Redeemable Convertible Preferred Stock
	In connection with the acquisition of iContact in February 2012, the Company issued 1,000,000 shares of Series A Preferred Stock with a deemed fair value at issuance of $77.5 million. The Company does not adjust the carrying value to the redemption amount of the convertible preferred stock as the carrying amount exceeds the redemption amount. There have been no changes to the recorded amount of the Series A Preferred Stock since the issuance of the shares.
	Each share of the Series A Preferred Stock has a liquidation preference equal to the greater of $77.30 (subject to appropriate adjustment in the event of any stock dividend, stock split, combination, or other similar recapitalization affecting the Series A Preferred Stock) or the value of the shares of common stock that would be issued in respect thereof upon conversion of such share of Series A Preferred Stock. The Series A Preferred Stock does not provide for interest and is entitled to participate in any dividends declared on the Company’s common stock on an as-converted basis. On February 24, 2017, the Company will be required to redeem each issued and outstanding share of the Series A Preferred Stock for $77.30 per share from its legally available funds, or such lesser amount of shares as it may then redeem under Delaware law. Each share of the Series A Preferred Stock is convertible into shares of the Company’s common stock at any time at the option of the holder. For conversions occurring on or before February 24, 2017, each share of Series A Preferred Stock will be convertible into 3.0256 shares of common stock (subject to customary adjustments). On and after February 25, 2017, each share of the Series A Preferred Stock which has not been redeemed will be convertible into 3.3282 shares of common stock (subject to customary adjustments).
	The holders of Series A Preferred Stock vote on an as-converted basis with the common stock, voting together as a single class, provided that the holders of the Series A Preferred Stock are entitled to vote separately as a class on certain matters affecting the Series A Preferred Stock. If any shares of Series A Preferred Stock are outstanding on or after February 24, 2017, the holders of the Series A Preferred Stock will have the right to vote separately as a class on additional actions by the Company related to acquisitions, redemptions, dividends, capital stock, and indebtedness. In addition, for so long as the outstanding shares of Series A Preferred Stock continue to represent at least 5% of the total outstanding shares of the Company’s common stock, calculated assuming the conversion of all outstanding shares of Series A Preferred Stock into shares of common stock, the holders of the Series A Preferred Stock, voting as a separate class, will have the exclusive right to elect one director to the Company’s Board of Directors (Series A Director).
	In connection with the acquisition of iContact, the Company also entered into, on February 24, 2012, an Investor Rights Agreement (Investor Rights Agreement) whereby the holders of the Series A Preferred Stock have the right to nominate a director to the Company’s Board for as long as they hold 5% or more of the Company’s issued and outstanding capital stock (which nominee shall be the Series A Director for so long as the holders of Series A Preferred Stock have the right to elect the Series A Director pursuant to the Certificate of Designation). In addition, subject to the terms and conditions of the Investor Rights Agreement, the holders of the Series A Preferred Stock shall have demand and piggyback registration rights and the right to participate in certain repurchases of common stock by the Company.
	Stockholder Rights Plan
	On May13, 2013, the Board authorized and declared a dividend distribution of one preferred stock purchase right (Right) for each outstanding share of the Company’s common stock and 3.0256 Rights for each outstanding share of the Company’s Series A Convertible Preferred Stock to stockholders of record at the close of business on May 13, 2013.
	Each Right entitles registered holders to purchase from the Company one one-thousandth of a share of the Company’s Series B Junior Participating Preferred Stock at a price of $46.00 per one one-thousandth of a share, subject to adjustment. The definitive terms of the Rights are set forth in a Rights Agreement, dated May 13, 2013. The Rights will be exercisable only if a person or group acquires 20% or more of the Company’s outstanding common stock (subject to certain exceptions), or if a person or group announces a tender or exchange offer, resulting in beneficial ownership of 20% or more of the outstanding common stock. The Rights also will be exercisable if a person or group that already beneficially owns or has the right to acquire on May 13, 2013, 20% or more of the Company’s outstanding common stock acquires additional shares equal to 1% or more of the Company’s then outstanding common stock (except in the case of a certain stockholder who, under limited circumstances, is permitted to beneficially own more than 20%, but less than 25%, of the Company’s outstanding common stock, subject to certain exceptions).
	The Board can redeem the Rights for $0.0001 per Right at any time prior to the earlier of the occurrence of a “trigger event” or the expiration date. Additionally, prior to an acquisition of 50% or more of the Company’s common stock, the Board may direct the mandatory exchange of the Rights (other than Rights owned by the acquiring person) at an exchange ratio of one newly issued share of common stock for each right.
	The Rights will expire on May 13, 2016 or 30 days after the Company’s 2014 annual meeting of stockholders if the continuation of the rights plan is not approved by the Company’s stockholders at its 2014 annual meeting, if not exercised or redeemed.
	Common Stock Repurchases
	In November 2008, the Company’s Board of Directors authorized a stock repurchase program for up to $30.0 million of the Company’s shares of common stock, and in August 2011 authorized up to an additional $30.0 million. The shares may be purchased from time to time in the open market. During the year ended December 31, 2011, the Company purchased an aggregate of 850,031 shares of its common stock for $16.8 million. The Company did not purchase any shares of its common stock under the stock repurchase program for the years ended December 31, 2012 and 2013. During the years ended December 31, 2011, 2012 and 2013, the Company also purchased 128,678, 143,789 and 35,695 shares of restricted stock for $3.2 million, $3.1 million and $477,000, respectively, which were withheld from employees to satisfy the minimum statutory tax withholding obligations upon the vesting of their restricted stock awards.

StockBased_Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Stock-Based Compensation	'
	10. Stock-Based Compensation
	The Company’s 1999 Stock Option Plan and 2005 Stock Award Plan (the “Plans”) provide for the grant of stock options, restricted stock, stock appreciation rights and other equity awards to employees, consultants, officers and directors. The 2005 Stock Award Plan was adopted by the Board of Directors and stockholders in November 2005 in conjunction with the Company’s initial public offering. Under the 2005 Stock Award Plan, 9,409,919 shares have been reserved for issuance, subject to annual increases. The Plans are administered by the Compensation Committee of the Board of Directors, which has the authority, among other things, to determine which individuals receive awards pursuant to the Plans, and the terms of the awards. Stock options granted under the Plans have a 10-year term and generally vest annually over a four-year period. Restricted stock awards generally vest annually over a four-year period. The Company’s outstanding equity awards include stock option awards and restricted stock awards. At December 31, 2013, 714,301 shares were available for future grants. All shares available for future grant are restricted to the 2005 Stock Award Plan.
	The following table sets forth the stock-based compensation expense for equity awards recorded in the consolidated statements of operations for the years ended December 31, 2011, 2012 and 2013 (in thousands):
		Year Ended December 31,
		2011			2012			2013
	Cost of revenues	$	1,575		$	1,514		$	1,356
	Sales and marketing		4,126			4,299			3,162
	Research and development		2,079			2,646			1,933
	General and administration		7,135			6,413			5,876
	Total	$	14,915		$	14,872		$	12,327
	Stock Option Awards
	The following weighted-average assumptions were used in calculating stock-based compensation for stock option awards granted during the years ended December 31, 2011, 2012 and 2013:
		Year Ended December 31,
		2011			2012			2013
	Stock price volatility		57	%		60	%		59	%
	Expected term (years)		6.1			5.7			6.1
	Risk-free interest rate		2.2	%		1.1	%		1.2	%
	Dividend yield		0	%		0	%		0	%
	The summary of stock option activity for the year ended December 31, 2013 is as follows:
		Number of			Range of			Weighted-			Weighted-		Aggregate
		Options			Exercise Prices			Average			Average		Intrinsic
								Exercise Price			Contractual		Value as of
								per Share			Term		December 31,
													2013
													(in thousands)
	Balance outstanding at January 1, 2013		2,555,943		$	2.46 –$35.98		$	15.93
	Granted		946,355			8.22 – 17.54			13.33
	Exercised		(11,583	)		2.46 – 9.00			7.44
	Forfeited or cancelled		(285,562	)		2.46 – 31.03			14.37
	Balance outstanding at December 31, 2013		3,205,153		$	3.99 – 35.98		$	15.33			7	$	1,202
	Vested and expected to vest at December 31, 2013		3,124,090		$	3.99 – 35.98		$	15.37			7	$	1,189
	Balance exercisable at December 31, 2013		1,433,554		$	3.99 – 35.98		$	15.78			5.2	$	1,038
	The weighted-average grant date fair value of stock options granted during the years ended December 31, 2011, 2012 and 2013 was $13.03, $7.36 and $7.29, respectively. The aggregate fair value of stock options that vested during the years ended December 31, 2011, 2012 and 2013 was $4.8 million, $3.5 million and $4.4 million, respectively. As of December 31, 2013, $10.6 million of total unrecognized stock-based compensation cost is related to nonvested stock option awards and is expected to be recognized over a weighted-average period of 2.5 years.
	The aggregate intrinsic value in the table above represents the difference between the exercise price of the underlying equity awards and the quoted closing price of the Company’s common stock at the last day of the year multiplied by the number of shares that would have been received by the stock option holders had all holders exercised their stock options on the last day of each respective year. The aggregate intrinsic value of options exercised during the years ended December 31, 2011, 2012 and 2013 was $15.5 million, $105,000 and $36,000, respectively.
	The following details the outstanding stock options at December 31, 2013:
		Options Outstanding									Options Exercisable
	Range of Exercise Prices	Outstanding			Weighted-			Weighted-			Exercisable		Weighted-
		as of			Average			Average			as of		Average
		12/31/13			Remaining			Exercise			12/31/13		Exercise
					Contractual			Price per					Price per
					Term			Share					Share
	$3.99 – $ 10.00		479,193			3.1		$	8.88			402,729	$	8.81
	$10.01 – $13.00		215,888			8.3			12.47			51,621		12.55
	$13.01 – $13.25		555,962			8.1			13.25			169,311		13.24
	$13.26 – $14.00		675,391			9.2			13.94			12,190		13.94
	$14.01 – $17.00		475,177			6.4			14.79			322,033		14.75
	$17.01 – $23.00		253,996			6.4			19.03			129,996		19.58
	$23.01 – $35.98		549,546			6.9			24.68			345,674		25.21
			3,205,153			7		$	15.33			1,433,554	$	15.78
	Restricted Stock Awards
	The fair value of the restricted stock awards is determined based on the quoted closing market price of the Company’s common stock on the grant date.
	The summary of restricted stock award activity for the year ended December 31, 2013 is as follows:
		Number of Shares			Weighted-Average
		Underlying Stock			Grant Date Fair
		Awards			Value
	Balance nonvested at January 1, 2013		979,790		$	17.12
	Awarded		654,485			13.17
	Vested		(556,714	)		16.23
	Forfeited		(140,025	)		15.19
	Balance nonvested at December 31, 2013		937,536		$	15.18
	As of December 31, 2013, $10.4 million of total unrecognized stock-based compensation cost is related to nonvested shares of restricted stock and is expected to be recognized over a weighted-average period of 2.4 years.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2013
Compensation And Retirement Disclosure [Abstract]	'
Employee Benefit Plans	'
	11. Employee Benefit Plans
	The Company sponsors defined-contribution, profit-sharing and other benefit plans in the United States, the United Kingdom and France. Total expenses for the plans for the years ended December 31, 2011, 2012 and 2013 were approximately $747,000, $1.0 million and $1.1 million, respectively.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	12. Income Taxes
	For the years ended December 31, 2011, 2012 and 2013, the U.S. and foreign components of loss before income taxes were as follows (in thousands):
		2011			2012			2013
	Domestic	$	(4,906	)	$	(20,848	)	$	(17,700	)
	Foreign		948			(1,316	)		(2,901	)
	Total loss before income taxes	$	(3,958	)	$	(22,164	)	$	(20,601	)
	For the years ended December 31, 2011, 2012 and 2013, income tax provision consisted of the following (in thousands):
		2011			2012			2013
	Current expense
	Federal	$	26		$	—		$	—
	State		6			34			(25	)
	Foreign		665			696			727
	Total current expense		697			730			702
	Deferred expense
	Federal		9,282			751			723
	State		884			94			73
	Foreign		(244	)		(148	)		(293	)
	Total deferred expense		9,922			697			503
	Total provision for income taxes	$	10,619		$	1,427		$	1,205
	A reconciliation of the Company’s effective tax rate to the statutory federal income tax rate for the years ended December 31, 2011, 2012 and 2013 is as follows:
		2011			2012			2013
	Statutory federal tax rate		35	%		35	%		35	%
	State income taxes, net of benefit		6			2			4
	Effect of foreign losses		(5	)		(1	)		—
	Non-deductible transaction costs		—			(3	)		—
	Non-deductible compensation		(19	)		(3	)		(1	)
	Other non-deductible expenses		13			—			(2	)
	Effect of uncertain tax positions		(5	)		(1	)		(1	)
	Changes in valuation allowance		(293	)		(35	)		(41	)
			(268	)%		(6	)%		(6	)%
	The provision for income taxes for the year ended December 31, 2011 differed from the expected tax provision computed by applying the U.S. federal statutory rate to income or loss before income taxes primarily due to the establishment of the valuation allowance and, to a lesser extent, state income taxes and certain non-deductible expenses including stock-based compensation and operating losses in foreign jurisdictions for which no tax benefit is currently available.
	In 2011, the Company established a valuation allowance against its U.S. federal and state net deferred tax assets because management concluded that it is more likely than not that it will not realize the tax benefits of its deferred tax assets based on recent operating results and current projections of future losses and, therefore, recorded a valuation allowance to reduce the carrying value of these net deferred tax assets. As a result, the valuation allowance on the Company’s net U.S. deferred tax assets increased by $11.8 million during the year ended December 31, 2011. As of December 31, 2011, the Company maintained a net valuation allowance against certain of its foreign deferred tax assets. The Company has historically maintained a net valuation allowance on deferred tax assets of certain of its foreign subsidiaries because management determined that it is more likely than not that it will not realize the tax benefits of its foreign deferred tax assets and, therefore, recorded a valuation allowance to reduce the carrying value of these foreign deferred tax assets to zero.
	The provision for income taxes for the year ended December 31, 2012 and 2013 differed from the expected tax provision computed by applying the U.S. federal statutory rate to loss before income taxes primarily due to the recognition of the U.S. valuation allowance, operating losses in foreign jurisdictions for which no tax benefit is currently available, non-deductible stock-based compensation, non-deductible acquisition-related transaction costs and to a lesser extent, state income taxes and certain other non-deductible expenses.
	As of December 31, 2012 and 2013, the Company maintained a full valuation allowance on its U.S. and certain of its foreign deferred tax assets because management determined that it was more likely than not that it will not realize the tax benefits of these deferred tax assets.
	The Company’s deferred tax components consisted of the following (in thousands):
		December 31,
		2012			2013
	Deferred tax assets:
	NOL carryforwards	$	27,481		$	29,864
	Allowance for doubtful accounts		51			47
	Deferred revenue		258			452
	Accrued expenses		2,188			906
	Intangible asset amortization		—			—
	Stock-based compensation		6,334			7,377
	Capital loss carryforward		1,787			1,786
	Other		1,274			1,528
	Total deferred tax assets		39,373			41,960
	Valuation allowance		(31,005	)		(39,402	)
	Net deferred tax assets		8,368			2,558
	Deferred tax liabilities:
	Capitalized software development		(590	)		(754	)
	Depreciation		(3,048	)		(2,280	)
	Goodwill and intangible asset amortization		(8,227	)		(3,394	)
	Other		(143	)		(302	)
	Total deferred tax liabilities		(12,008	)		(6,730	)
	Net deferred tax liability	$	(3,640	)	$	(4,172	)
	The Company has not provided for U.S. income taxes on the undistributed earnings and the other outside basis temporary differences of foreign subsidiaries as they are considered indefinitely reinvested outside of the U.S.
	At December 31, 2013, the amount of temporary differences related to undistributed earnings of investments in foreign subsidiaries upon which United States income taxes have not been provided was zero.
	As of December 31, 2013, the Company had net operating loss (NOL) carryforwards for federal and state tax purposes of approximately $85.0 million and $41.7 million, respectively, which will expire between 2025 and 2033. The Company also has $1.0 million of federal and state R&D tax credit that will expire between 2017 and 2033, $390,000 of non-expiring Alternative Minimum Tax credit and $285,000 of state employment tax credits that will expire between 2014 and 2017. The Company’s foreign subsidiaries generated NOL carryforwards of $15.7 million including $14.4 million of non-expiring losses and $1.3 million that will expire between 2020 and 2023. Included in these amounts at December 31, 2013 are approximately $5.4 million in cumulative income tax deductions on the exercise of stock options and the vesting of restricted stock awards. This income tax benefit will be recorded to additional paid-in-capital when realized.
	Certain of the Company’s federal and state NOL carryforwards are subject to annual limitations under Section 382 of Internal Revenue Code. The limitations imposed under Section 382 will not preclude the Company from realizing these NOLs but may operate to limit their utilization of the NOLs in any given tax year in the event that the Company’s federal and state taxable income exceeds the limitation imposed by Section 382.
	The Company recorded a tax deficiency from equity awards to additional paid-in capital for the years ended December 31, 2011 and 2012, as certain equity awards that vested and were exercised resulted in a shortfall, however, as the Company generated sufficient excess tax benefits in the previous years, the shortfall only reduced the cumulative additional paid-in capital from excess tax benefits. The Company has elected to use the “with and without” method for recognition of excess tax benefits related to equity awards.
	The Company elected not to record the impact of the French 3% dividend withholding tax with respect to its wholly owned French subsidiary deferred tax assets and liabilities as the Company does not anticipate declaring and distributing any dividends out of the available accumulated earnings of its wholly owned French subsidiary. In the event that the Company would cause its wholly owned French subsidiary to declare and distribute a future dividend the Company would record the impact of the French withholding tax that will be due to the French government at the time that it declares and distribute such dividend. The available accumulated earnings that could be distributed by the Company’s wholly owned French subsidiary are $5.0 million. In the event that the Company declares and distributes a dividend that equals to the total available accumulated earnings of its wholly owned French subsidiary, the Company would record an additional income tax expense of $150,000. This tax expense will be recorded as a discrete item in the period that the distribution occurs.
	As of December 31, 2012 and 2013, the Company had unrecognized tax benefits of $933,000 and $1.1 million, respectively included in other liabilities, including interest and penalties of $492,000 and $567,000, respectively. As of December 31, 2012, the total amount of gross unrecognized tax benefits was $1.1 million, if recognized, would favorably impact the Company’s effective tax rate. As of December 31, 2013, the total amount of gross unrecognized tax benefits was $1.3 million if recognized, would favorably impact the Company’s effective tax rate. For the years ended December 31, 2012 and 2013, the Company recognized $56,000 and $76,000, respectively of interest expense in connection with tax matters which is included in income tax expense. The Company does not believe its unrecognized tax positions will materially change over the next twelve months.
The change in unrecognized tax benefits, excluding accrued interest, for the years ended December 31, 2012 and 2013, were as follows (in thousands):
	December 31,
	2012			2013
Balance as of beginning of period	$	501		$	585
Additions based on tax positions taken in the current year		80			78
Additions for tax positions of prior years		4			76
Balance as of end of period	$	585		$	739
The Company files income tax returns in U.S. federal jurisdictions and various state and foreign jurisdictions and is subject to U.S. federal, state, and foreign tax examinations for years ranging from 2003 to 2013.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	13. Commitments and Contingencies
	Leases
	The Company has various non-cancelable operating leases, primarily related to office real estate, that expire through 2023 and generally contain renewal options for up to five years. Lease incentives, payment escalations and rent holidays specified in the lease agreements are accrued or deferred as appropriate as a component of rent expense which is recognized on a straight-line basis over the terms of occupancy. As of December 31, 2012, deferred rent of $752,000 and $5.7 million is included in accrued expenses and other liabilities, respectively. As of December 31, 2013, deferred rent of $783,000 and $5.0 million is included in accrued expenses and other liabilities, respectively.
	The Company also leases computer and office equipment under non-cancelable capital leases and other financing arrangements that expire through 2017.
	Future minimum lease payments under non-cancelable operating and capital leases at December 31, 2013 are as follows (in thousands):
		Operating		Capital
		Leases		Leases
	2014	$	4,025	$	150
	2015		3,976		110
	2016		3,852		83
	2017		2,722		1
	2018		2,024		—
	2019 and thereafter		8,597		—
	Total future minimum payments	$	25,196		344
	Less amount representing interest				(64	)
	Less current portion				(102	)
	Long-term capital lease obligations			$	178
	Rent expense was $2.9 million, $5.0 million and $5.2 million for the years ended December 31, 2011, 2012, and 2013, respectively.
	Purchase Commitments
	The Company entered into agreements with various vendors in the ordinary course of business. As of December 31, 2013, minimum required payments in future years under these arrangements are $5.8 million, $2.8 million and $1.0 million in 2014, 2015 and 2016, respectively.
	Letters of Credit
	As of December 31, 2013, the Company had a total of $1.3 million in letters of credit outstanding substantially in favor of landlords for certain of its office spaces. These letters of credit do not require compensating balances and expire at various dates through May 2023.
	Self-Insurance
	In 2011, the Company enrolled in a self-insured plan for a majority of its U.S. employee health insurance costs, including claims filed and claims incurred but not reported (IBNR) subject to certain stop loss provisions. The Company estimates the liability based upon management’s judgment, historical data and the assistance of third-party actuaries in determining an adequate liability for self-insurance claims. The Company’s IBNR accrual and expenses may fluctuate due to the number of plan participants, claims activity and deductible limits.
	Litigation and Claims
	On January 23, 2014, North Venture Partners, LLC (NVP) filed a complaint that named the Company as a defendant in a lawsuit in the U.S. District Court for the Northern District of California (Civil Action No. C14-0337). The complaint, which was served to the Company on January 27, 2014, alleges that it failed to pay the full amount of the earn-out payment due under an Asset Purchase Agreement dated February 24, 2011 in which the Company acquired certain assets of NVP. For more information, please refer to Note 14, Subsequent Events.
	The Company from time to time is subject to lawsuits, investigations and claims arising out of the ordinary course of business, including those related to commercial transactions, contracts, government regulation and employment matters. In the opinion of management based on all known facts, all other matters are either without merit or are of such kind, or involve such amounts that would not have a material effect on the financial position or results of operations of the Company if disposed of unfavorably.

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	14. Subsequent Events
	On January 23, 2014, NVP filed a complaint that named the Company as a defendant in a lawsuit in the U.S. District Court for the Northern District of California (Civil Action No. C14-0337). The complaint, which was served to the Company on January 27, 2014, alleges that it failed to pay the full amount of the earn-out payment due under an Asset Purchase Agreement dated February 24, 2011 in which the Company acquired certain assets of NVP. NVP’s complaint seeks an award for damages of approximately $6.4 million. This litigation is in its early stages, therefore, neither the outcome of this litigation nor an estimate of a probable loss or any reasonably possible losses are determinable at this time. The Company believes it has meritorious defenses and intends to vigorously defend the lawsuit.
	On February 4, 2014 the Company decided to discontinue its North Social platform, a stand-alone product that provided Facebook applications for small businesses, because it did not align with the current strategic direction of the Company. The Company is in the process of evaluating the impact to its consolidated financial statements.
	Also in February 2014, the Company made a decision to shut-down its sales operations in its Philippines office. As a result, during the next three to six months, the Company is expected to incur estimated expenses totaling $5.0 million for costs relating to the termination of the lease, impairment of assets and severance from the reduction in the workforce.

Quarterly_Financial_Informatio

Quarterly Financial Information (Unaudited)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Quarterly Financial Information (Unaudited)	'
	15. Quarterly Financial Information (Unaudited)
			March 31,			June 30,			September 30,			December 31,			March 31,			June 30,			September 30,			December 31,
			2012(1)			2012			2012			2012			2013			2013			2013			2013
			(Dollars in thousands, except per share data)
	Summary consolidated statement of operations data:
	Revenues		$	34,853		$	43,620		$	45,217		$	47,114		$	46,247		$	46,617		$	46,615		$	47,452
	Gross profit			27,539			34,920			36,285			38,311			36,495			36,813			37,314			38,089
	Net loss			(10,825	)		(5,189	)		(3,845	)		(3,732	)		(8,125	)		(5,892	)		(3,851	)		(3,938	)
	Net loss per share:
	Basic and diluted		$	(0.57	)	$	(0.27	)	$	(0.20	)	$	(0.19	)	$	(0.41	)	$	(0.29	)	$	(0.19	)	$	(0.20	)
	Weighted average shares outstanding used in computing per share amounts:
	Basic and diluted			19,042,761			19,540,700			19,570,459			19,600,644			19,790,692			20,099,700			20,151,494			20,185,672
	-1	During the three months ended March 31, 2012, the Company incurred $2.9 million of acquisition-related transaction costs and $2.1 million of employee severance costs in connection with its acquisition of iContact.

Schedule_II_Valuation_and_Qual

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2013
Valuation And Qualifying Accounts [Abstract]	'
Schedule II - Valuation and Qualifying Accounts	'
	Vocus, Inc.
	Schedule II — Valuation and Qualifying Accounts
			Balance		Charged		Additions			Additions		Balance
			at		to		(Deductions)			Acquired		at
			Beginning		Costs or					from		End of
			of Period		Expenses					Business		Period
										Combinations
										-2
	Allowance for doubtful accounts (in thousands):
	Year ended December 31, 2011 (1)		$	182	$	408	$	(346	)	$	—	$	244
	Year ended December 31, 2012 (1)			244		408		(416	)		—		236
	Year ended December 31, 2013 (1)			236		638		(640	)		—		234
	Deferred tax valuation allowance (in thousands):
	Year ended December 31, 2011		$	1,997	$	11,657	$	—		$	—	$	13,654
	Year ended December 31, 2012			13,654		8,236		2,859			6,256		31,005
	Year ended December 31, 2013			31,005		9,308		(911	)		—		39,402
	-1	Deductions include actual accounts written-off, net of recoveries.
	-2	Valuation allowance established from the acquisition of iContact.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) and include the accounts of Vocus, Inc. and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions. On an on-going basis, the Company evaluates its estimates, including, but not limited to, those related to the allowance for doubtful accounts, software development costs, useful lives of property, equipment and software, intangible assets and goodwill, contingent liabilities, self-insurance, revenue recognition, fair value of stock-based awards and income taxes, among others. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities as well as the reported amounts of revenues and expenses during the period. Actual results could differ from these estimates.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	The Company considers all highly liquid investments with original maturity dates of three months or less at the time of purchase to be cash equivalents.
Investments	'
	Investments
	Management determines the appropriate classification of investments at the time of purchase and evaluates such a determination as of each balance sheet date. The Company’s investments were classified as available-for-sale securities and were stated at fair value at December 31, 2012. There were no available-for-sale securities at December 31, 2013. Realized gains and losses are included in other income (expense) based on the specific identification method. Realized gains or losses for the years ended December 31, 2011, 2012, and 2013 were not material. Net unrealized gains and losses on available-for-sale securities are reported as a component of other comprehensive income (loss), net of tax. As of December 31, 2012, the net unrealized gains or losses on available-for-sale securities were not material. The Company regularly monitors and evaluates the fair value of its investments to identify other-than-temporary declines in value.
Fair Value Measurements	'
	Fair Value Measurements
	The Company measures certain financial assets at fair value pursuant to a fair value hierarchy based on inputs to valuation techniques that are used to measure fair value that are either observable or unobservable. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon its own market assumptions. The fair value hierarchy consists of the following three levels:
	Level 1	–	Inputs are quoted prices in active markets for identical assets or liabilities.
	Level 2	–	Inputs are quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable and market-corroborated inputs which are derived principally from or corroborated by observable market data.
	Level 3	–	Inputs are derived from valuation techniques in which one or more significant inputs or value drivers are unobservable.
Allowance for Doubtful Accounts	'
	Allowance for Doubtful Accounts
	Estimates are used to determine the amount of the allowance for doubtful accounts necessary to reduce accounts receivable to the estimated net realizable value. These estimates are made by analyzing the status of significant past-due receivables and by establishing provisions for estimated losses by analyzing current and historical bad debt trends. Actual collection experience has not varied significantly from prior estimates.
Software Development and Information Database Costs	'
	Software Development and Information Database Costs
	The Company incurs software development costs related to its cloud-based software. Qualifying costs incurred during the application development stage are capitalized. These costs primarily consist of internal labor and are amortized using the straight-line method over the estimated useful life of the software, which is generally two years. All other development costs are expensed as incurred. The Company capitalized the initial costs to acquire and develop its proprietary information database, which consists of media contacts and outlets and other relevant data integrated as part of the Company’s cloud-based solutions. These costs are amortized using the straight-line method over the estimated useful lives of nine to thirteen years. Costs to maintain and update the information database are expensed as cost of revenues as incurred. For the years ended December 31, 2011, 2012 and 2013, the Company recorded amortization expense of $581,000, $499,000 and $490,000, respectively.
Property, Equipment and Software	'
	Property, Equipment and Software
	Property, equipment and software are stated at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the assets as follows: three to five years for purchased software and computer and office equipment and five to seven years for furniture and fixtures. Assets acquired under capital leases and leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful lives of the assets or the terms of the leases. Amortization of assets acquired under capital leases is included in depreciation expense. Repairs and maintenance costs are charged to expense as incurred. When assets are retired or otherwise disposed of, the asset and related accumulated depreciation are eliminated from the accounts and any resulting gain or loss is recorded in the results of operations.
Long-Lived Assets	'
	Long-Lived Assets
	Long-lived assets include property, equipment and software and intangible assets with finite lives. Intangible assets consist of customer relationships, trade names and purchased technology acquired in business combinations. Intangible assets are amortized using the straight-line method over their estimated useful lives ranging from two to seven years. Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be fully recoverable. If an impairment indicator is present, the Company evaluates recoverability by a comparison of the carrying amount of the assets to future undiscounted net cash flows expected to be generated by the assets. If the assets are impaired, the impairment recognized is measured by the amount by which the carrying amount exceeds the estimated fair value of the assets. Impairment charges for long-lived assets for the years ended December 31, 2011 and 2013 were $100,000 and $301,000, respectively. Impairment charges for long-lived assets for the year ended December 31, 2012 were $709,000, which primarily related to leasehold improvements no longer used.
Business Combinations	'
	Business Combinations
	The Company has completed acquisitions of businesses that have resulted in the recording of goodwill and identifiable definite-lived intangible assets. The Company recognizes all of the assets acquired, liabilities assumed and contingent consideration at their fair values on the acquisition date. The Company uses significant estimates and assumptions, including fair value estimates, as of the acquisition date and refines those estimates that are provisional, as necessary, during the measurement period. The measurement period is the period after the acquisition date, not to exceed one year, in which new information may be gathered about facts and circumstances that existed as of the acquisition date to adjust the provisional amounts recognized. Measurement period adjustments are applied retrospectively. All other adjustments are recorded to the consolidated statements of operations. Acquisition-related costs are expensed as incurred separately from the acquisition and generally are included in general and administrative expenses in the consolidated statements of operations.
Goodwill	'
	Goodwill
	Goodwill represents the excess of the cost of an acquired entity over the net fair value of the identifiable assets acquired and liabilities assumed. Goodwill is not amortized, but rather is assessed for impairment at least annually. The Company performs its annual impairment assessment on November 1, or whenever events or circumstances indicate impairment may have occurred. The Company operates under one reporting unit, and as a result, evaluates goodwill impairment based on the fair value of the Company as a whole. When assessing goodwill for impairment, the Company uses an income approach based on discounted cash flows to determine the fair value of its reporting unit. The Company’s cash flow assumptions consider historical and forecasted revenue, operating costs and other relevant factors which are consistent with the plans used to manage the Company’s operations. Based on the results of the Company’s most recent annual assessment performed on November 1, 2013, the Company concluded that the fair value of its reporting unit exceeded its carrying amount. The Company also reviews the carrying amount of the reporting unit to its fair value based on quoted market prices of the Company’s common stock, or market capitalization. The market capitalization of the Company exceeded its carrying amount on November 1, 2013. No events or circumstances occurred from the date of the assessments through December 31, 2013 that would impact these conclusions.
Foreign Currency and Operations	'
	Foreign Currency and Operations
	The reporting currency for all periods presented is the U.S. dollar. The functional currency for the Company’s foreign subsidiaries is the local currency. The financial statements of these subsidiaries are translated into U.S. dollars using exchange rates in effect at the balance sheet date for assets and liabilities and average exchange rates during the period for revenues and expenses. The resulting translation adjustments are included in accumulated other comprehensive income (loss), a separate component of stockholders’ equity. Transaction gains and losses in currencies other than the functional currency are included in other income (expense) in the consolidated statements of operations. Amounts resulting from foreign currency transactions were not material for the years ended December 31, 2011, 2012 and 2013.
Comprehensive Income (Loss)	'
	Comprehensive Income (Loss)
	Comprehensive income (loss) includes the Company’s net income (loss) as well as other changes in stockholders’ equity that result from transactions and economic events other than those with stockholders. Other comprehensive income (loss) includes foreign currency translation adjustments and net unrealized gains and losses on investments classified as available-for-sale securities.
Revenue Recognition	'
	Revenue Recognition
	The Company derives its revenues from subscription arrangements and related services permitting customers to access and utilize the Company’s cloud-based software. The Company also derives revenues from news distribution services sold separately from its subscription arrangements. The Company recognizes revenue when there is persuasive evidence of an arrangement, the service has been provided to the customer, the collection of the fee is probable and the amount of the fee to be paid by the customer is fixed or determinable. The Company allocates consideration to each deliverable in multiple element arrangements based on the relative selling prices and recognizes revenue as the respective services are delivered or performed.
	The Company’s separate units of accounting consist of its subscription services, news distribution services and professional services. These elements generally include access to the Company’s cloud-based software, hosting services, content and content updates and customer support. The Company’s subscription agreements typically are non-cancelable, though customers have the right to terminate their agreements for cause if the Company materially breaches its obligations under the agreement. Subscription agreements do not provide customers the right to take possession of the software at any time.
	The Company also distributes individual news releases to the Internet which are indexed by major search engines and distributed directly to various news sites, journalists and other key constituents. The Company recognizes revenue on a per-transaction basis when the press releases are made available to the public.
	The Company’s professional services primarily consist of data migration, custom development and training. The Company’s cloud-based software does not require significant modification and customization services.
	The Company established vendor-specific objective evidence (VSOE) of the fair value for the selling price for certain of its news distribution services as the selling price for a substantial majority of stand-alone sales fall within a narrow range around the median selling price. The Company determined third-party evidence (TPE) of selling price is not available for any of its services due to differences in the features and functionality compared to competitors’ products. Therefore, the Company uses its estimated selling prices (ESP) for the remaining deliverables by analyzing multiple factors such as historical pricing trends, discounting practices, gross margin objectives and other market conditions.
	Sales and other taxes collected from customers to be remitted to government authorities are excluded from revenues.
Deferred Revenue	'
	Deferred Revenue
	Deferred revenue consists of payments received from or billings to customers in advance of revenue recognition. Deferred revenue to be recognized in the succeeding twelve month period is included in current deferred revenue with the remaining amounts included in non-current deferred revenue.
Sales Commissions	'
	Sales Commissions
	Sales commissions are expensed when a subscription agreement is executed by the customer.
Advertising Costs	'
	Advertising Costs
	The Company expenses advertising costs as incurred. Advertising costs for the years ended December 31, 2011, 2012 and 2013 were $8.9 million, $23.4 million and $22.7 million, respectively.
Stock-Based Compensation	'
	Stock-Based Compensation
	The Company’s share-based arrangements include stock option awards and restricted stock awards. The Company recognizes compensation expense for its equity awards on a straight-line basis over the requisite service period of the award based on the estimated portion of the award that is expected to vest and applies estimated forfeiture rates based on analyses of historical data, including termination patterns and other factors. The Company uses the quoted closing market price of its common stock on the grant date to measure the fair value of restricted stock awards and the Black-Scholes option pricing model to measure the fair value of stock option awards. The Company uses the daily historical volatility of its stock price over the expected life of the options to calculate the expected volatility. The Company uses a combination of its historical exercise data with expected future exercise patterns using the average midpoint between vesting and the contractual term to determine the expected term of option awards. The risk-free interest rate is based on the rate on U.S. Treasury securities with maturities consistent with the estimated expected term of the awards. The Company has not paid dividends and does not anticipate paying a cash dividend in the foreseeable future and, accordingly, uses an expected dividend yield of zero.
Concentrations of Credit Risk	'
	Concentrations of Credit Risk
	Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash and cash equivalents, investments and accounts receivable. The Company generally maintains its cash and cash equivalents with various nationally recognized financial institutions. Investments consisted of investment grade, interest bearing securities. Customers are granted credit on an unsecured basis. Management monitors the creditworthiness of its customers and believes that it has adequately provided for any exposure to potential credit losses.
	The Company provides cloud-based software and related services to various customers across several industries. As of December 31, 2012 and 2013, no individual customer accounted for 10% or more of net accounts receivable. For the years ended December 31, 2011, 2012 and 2013, no individual customer accounted for 10% or more of revenue. As of December 31, 2012 and 2013, assets located outside the United States were approximately 9% and 10% of total assets, respectively. Revenues from sales to customers outside the United States were approximately 16%, 11%, and 10% of total revenues for the years ended December 31, 2011, 2012 and 2013, respectively.
Income Taxes	'
	Income Taxes
	Income taxes are determined utilizing the asset and liability method whereby deferred tax assets and liabilities are recognized for deductible temporary differences between the respective reported amounts and tax bases of assets and liabilities, as well as for operating loss and tax-credit carryforwards. Net deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized.
	Beginning in 2011, based on the operating results and the Company’s projections of future losses, the Company established a full valuation allowance on its U.S. federal and state net deferred tax assets because it was able to conclude that it is more likely than not that it will not realize the benefits of its deferred tax assets. The Company historically maintained a full valuation allowance on net deferred tax assets of certain of its foreign subsidiaries because it determined that it is more likely than not that it will not realize the benefits of its foreign deferred tax assets.
	The Company’s estimates related to liabilities for uncertain tax positions require it to make judgments regarding the sustainability of each uncertain tax position based on its technical merits. If it determines it is more likely than not that a tax position will be sustained based on its technical merits, the Company records the impact of the position in its consolidated financial statements at the largest amount that is greater than fifty percent likely of being realized upon ultimate settlement. The estimates are updated at each reporting date based on the facts, circumstances and information available. The Company is also required to assess at each reporting date whether it is reasonably possible that any significant increases or decreases to its unrecognized tax benefits will occur during the next twelve months. The Company files income tax returns in the U.S. federal jurisdictions and various state and foreign jurisdictions and is subject to U.S. federal, state, and foreign tax examinations for years ranging from 2003 to 2013.
Earnings Per Share	'
	Earnings Per Share
	Basic net income or loss per share attributable to common stockholders is computed by dividing net income or loss attributable to common stockholders by the weighted average number of common shares outstanding for the period. Nonvested shares of restricted stock are not included in the computation of basic net income per share until vested. The Company’s outstanding grants of restricted stock do not contain non-forfeitable dividend rights. Diluted net income per share attributable to common stockholders is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period. For purposes of this calculation, options to purchase common stock, nonvested shares of restricted stock and shares of redeemable convertible preferred stock are considered to be common stock equivalents.
	As the Company has issued shares of Series A redeemable convertible preferred stock that participate in dividends with the common stock, the Company is required to apply the two-class method to compute the net income per share attributable to common stockholders. In periods of sufficient earnings, the two-class method assumes an allocation of undistributed earnings to both participating stock classes.
	For the years ended December 2011, 2012 and 2013, the Company incurred net losses and, therefore, the effect of the Company’s outstanding stock options, nonvested shares of restricted stock and redeemable convertible preferred stock was not included in the calculation of diluted loss per share as the effect would be anti-dilutive. For the years ended December 31, 2011, 2012 and 2013, diluted earnings per share excluded the impact of 1,757,240, 2,555,943 and 3,205,153 outstanding stock options, respectively, and 1,282,323, 979,790 and 937,536 nonvested shares of restricted stock, respectively and for the years ended December 31, 2012 and 2013, 1,000,000 shares of Series A redeemable convertible preferred stock as the result would be anti-dilutive.
Segment Data	'
	Segment Data
	The Company’s chief operating decision maker manages the Company’s operations on a consolidated basis for purposes of assessing performance and making operating decisions. Accordingly, the Company reports on its business as one segment.

Business_Combinations_Tables

Business Combinations (Tables)	12 Months Ended
	Dec. 31, 2013
Business Combinations [Abstract]	'
Purchase Consideration for Acquisition	'
	The purchase consideration consisted of the following (in thousands):
	Cash	$	89,801
	Note payable		669
	Common stock		9,118
	Series A redeemable convertible preferred stock		77,490
	Total purchase consideration	$	177,078
Allocation of the Purchase Price as of Acquisition	'
	The purchase price as of the acquisition date was as follows (in thousands):
		Estimated			Estimated
		Useful Life			Fair Value
	Cash and cash equivalents				$	10,000
	Accounts receivable, net					96
	Prepaid and other current assets					478
	Property, equipment and software, net					2,625
	Trade name		3 years			1,400
	Customer relationships		3 years			19,166
	Purchased technology		3 years			12,041
	Goodwill					138,860
	Accounts payable and accrued liabilities					(5,911	)
	Deferred revenue					(1,645	)
	Other liabilities					(32	)
	Total purchase price				$	177,078
Pro Forma Information Results of Operations	'
	The following unaudited pro forma information is not intended to be indicative of future operating results (dollars in thousands, except per share data):
		Year Ended December 31,
		2011			2012
	Pro forma revenues	$	162,743		$	180,403
	Pro forma net loss	$	(30,883	)	$	(19,279	)
	Pro forma net loss per share:
	Basic and diluted	$	(1.61	)	$	(0.99	)

Cash_Equivalents_and_Investmen1

Cash Equivalents and Investments (Tables)	12 Months Ended
	Dec. 31, 2013
Cash And Cash Equivalents [Abstract]	'
Components of Cash Equivalents and Investments	'
	The components of cash equivalents and investments at December 31, 2012 were as follows (in thousands):
				Unrealized				Fair
								Market
		Cost		Gains		Losses		Value
	Cash equivalents:
	Money market funds	$	11,290	$	—	$	—	$	11,290
	Certificates of deposit		1,322		—		—		1,322
	Short-term investments:
	Certificates of deposit		660		2		—		662
	Long-term investments:
	Certificates of deposit		1,322		—		—		1,322
	Total	$	14,594	$	2	$	—	$	14,596
	The components of cash equivalents and investments at December 31, 2013 were as follows (in thousands):
				Unrealized				Fair
								Market
		Cost		Gains		Losses		Value
	Cash equivalents:
	Money market funds	$	5,302	$	—	$	—	$	5,302
	Certificates of deposit		6,907		—		—		6,907
	Total	$	12,209	$	—	$	—	$	12,209

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements of Assets and Liabilities	'
	The fair value measurements of the Company’s financial assets and liabilities measured on a recurring basis at December 31, 2012 were as follows (in thousands):
		Total			Level 1			Level 2		Level 3
	Assets:
	Cash equivalents	$	12,612		$	12,612		$	—	$	—
	Short-term investments		662			662			—		—
	Long-term investments		1,322			1,322			—		—
	Total assets measured at fair value	$	14,596		$	14,596		$	—	$	—
	Liabilities:
	Accrued expenses:
	Accrued contingent consideration, current portion	$	1,107		$	—		$	—	$	1,107
	Total liabilities measured at fair value	$	1,107		$	—		$	—	$	1,107
	The fair value measurements of the Company’s financial assets and liabilities measured on a recurring basis at December 31, 2013 were as follows (in thousands):
		Total			Level 1			Level 2		Level 3
	Assets:
	Cash equivalents	$	12,209		$	12,209		$	—	$	—
	Total assets measured at fair value	$	12,209		$	12,209		$	—	$	—
Changes in Fair Value of Acquisition Related Contingent Consideration	'
	The changes in the fair value of the Company’s acquisition related contingent consideration for the years ended December 31, 2012 and 2013, were as follows (in thousands):
		December 31,
		2012			2013
	Balance as of beginning of period	$	7,537		$	1,107
	Adjustments to fair value measurements		1,176			3,453
	Payment of contingent consideration		(7,606	)		(4,560	)
	Balance as of end of period	$	1,107		$	—

Property_Equipment_and_Softwar1

Property, Equipment and Software (Tables)	12 Months Ended
	Dec. 31, 2013
Property Plant And Equipment [Abstract]	'
Summary of Property, Equipment and Software	'
	Property, equipment and software consisted of the following (in thousands):
		December 31,
		2012			2013
	Purchased software, computer and office equipment	$	12,539		$	14,397
	Furniture and fixtures		2,030			2,397
	Leasehold improvements		11,499			13,471
	Equipment under capital lease obligations		569			560
	Capitalized software development costs		1,960			2,762
	Information database costs		2,839			2,839
			31,436			36,426
	Less accumulated depreciation and amortization		(11,368	)		(16,292	)
	Property, equipment and software, net	$	20,068		$	20,134

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Changes in Carrying Amount of Goodwill	'
	The changes in the carrying amount of goodwill for the years ended December 31, 2012 and 2013 were as follows (in thousands):
		December 31,
		2012		2013
	Balance as of beginning of period	$	38,029	$	177,011
	Goodwill acquired		138,860		—
	Effects of foreign currency translation		122		253
	Balance as of end of period	$	177,011	$	177,264
Details of Intangible Assets	'
	Intangible assets at December 31, 2012 consisted of the following (in thousands):
		Weighted-Average		Gross		Amortization			Net Carrying
		Amortization		Carrying					Amount
		Period		Amount
	Customer relationships		3.7	$	23,221	$	(7,014	)	$	16,207
	Trade names		5.9		5,686		(4,192	)		1,494
	Purchased technology		3.1		13,460		(4,410	)		9,050
	Total			$	42,367	$	(15,616	)	$	26,751
	Intangible assets at December 31, 2013 consisted of the following (in thousands):
		Weighted-Average		Gross		Amortization			Net Carrying
		Amortization		Carrying					Amount
		Period		Amount
	Customer relationships		3.7	$	23,376	$	(14,074	)	$	9,302
	Trade names		5.9		5,695		(5,058	)		637
	Purchased technology		3.1		13,496		(8,630	)		4,866
	Total			$	42,567	$	(27,762	)	$	14,805
Future Expected Amortization of Intangible Assets	'
	Future expected amortization of intangible assets at December 31, 2013 was as follows (in thousands):
	2014	$	11,720
	2015		2,352
	2016		575
	2017		158
	Total	$	14,805

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Components of Stock-Based Compensation Expense for Equity Awards Recorded in the Consolidated Statements of Operations	'
	The following table sets forth the stock-based compensation expense for equity awards recorded in the consolidated statements of operations for the years ended December 31, 2011, 2012 and 2013 (in thousands):
		Year Ended December 31,
		2011			2012			2013
	Cost of revenues	$	1,575		$	1,514		$	1,356
	Sales and marketing		4,126			4,299			3,162
	Research and development		2,079			2,646			1,933
	General and administration		7,135			6,413			5,876
	Total	$	14,915		$	14,872		$	12,327
Weighted-Average Assumptions Used in Calculating Stock-Based Compensation for Stock Option Awards Granted	'
	The following weighted-average assumptions were used in calculating stock-based compensation for stock option awards granted during the years ended December 31, 2011, 2012 and 2013:
		Year Ended December 31,
		2011			2012			2013
	Stock price volatility		57	%		60	%		59	%
	Expected term (years)		6.1			5.7			6.1
	Risk-free interest rate		2.2	%		1.1	%		1.2	%
	Dividend yield		0	%		0	%		0	%
Summary of Stock Option Activity	'
	The summary of stock option activity for the year ended December 31, 2013 is as follows:
		Number of			Range of			Weighted-			Weighted-		Aggregate
		Options			Exercise Prices			Average			Average		Intrinsic
								Exercise Price			Contractual		Value as of
								per Share			Term		December 31,
													2013
													(in thousands)
	Balance outstanding at January 1, 2013		2,555,943		$	2.46 –$35.98		$	15.93
	Granted		946,355			8.22 – 17.54			13.33
	Exercised		(11,583	)		2.46 – 9.00			7.44
	Forfeited or cancelled		(285,562	)		2.46 – 31.03			14.37
	Balance outstanding at December 31, 2013		3,205,153		$	3.99 – 35.98		$	15.33			7	$	1,202
	Vested and expected to vest at December 31, 2013		3,124,090		$	3.99 – 35.98		$	15.37			7	$	1,189
	Balance exercisable at December 31, 2013		1,433,554		$	3.99 – 35.98		$	15.78			5.2	$	1,038
Summary of Outstanding Stock Options	'
	The following details the outstanding stock options at December 31, 2013:
		Options Outstanding									Options Exercisable
	Range of Exercise Prices	Outstanding			Weighted-			Weighted-			Exercisable		Weighted-
		as of			Average			Average			as of		Average
		12/31/13			Remaining			Exercise			12/31/13		Exercise
					Contractual			Price per					Price per
					Term			Share					Share
	$3.99 – $ 10.00		479,193			3.1		$	8.88			402,729	$	8.81
	$10.01 – $13.00		215,888			8.3			12.47			51,621		12.55
	$13.01 – $13.25		555,962			8.1			13.25			169,311		13.24
	$13.26 – $14.00		675,391			9.2			13.94			12,190		13.94
	$14.01 – $17.00		475,177			6.4			14.79			322,033		14.75
	$17.01 – $23.00		253,996			6.4			19.03			129,996		19.58
	$23.01 – $35.98		549,546			6.9			24.68			345,674		25.21
			3,205,153			7		$	15.33			1,433,554	$	15.78
Summary of Restricted Stock Award Activity	'
	The summary of restricted stock award activity for the year ended December 31, 2013 is as follows:
		Number of Shares			Weighted-Average
		Underlying Stock			Grant Date Fair
		Awards			Value
	Balance nonvested at January 1, 2013		979,790		$	17.12
	Awarded		654,485			13.17
	Vested		(556,714	)		16.23
	Forfeited		(140,025	)		15.19
	Balance nonvested at December 31, 2013		937,536		$	15.18

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
U.S. and Foreign Components of Income (Loss) Before Income Taxes	'
	For the years ended December 31, 2011, 2012 and 2013, the U.S. and foreign components of loss before income taxes were as follows (in thousands):
		2011			2012			2013
	Domestic	$	(4,906	)	$	(20,848	)	$	(17,700	)
	Foreign		948			(1,316	)		(2,901	)
	Total loss before income taxes	$	(3,958	)	$	(22,164	)	$	(20,601	)
Summary of Income Tax Provision	'
	For the years ended December 31, 2011, 2012 and 2013, income tax provision consisted of the following (in thousands):
		2011			2012			2013
	Current expense
	Federal	$	26		$	—		$	—
	State		6			34			(25	)
	Foreign		665			696			727
	Total current expense		697			730			702
	Deferred expense
	Federal		9,282			751			723
	State		884			94			73
	Foreign		(244	)		(148	)		(293	)
	Total deferred expense		9,922			697			503
	Total provision for income taxes	$	10,619		$	1,427		$	1,205
Reconciliation of the Company's Effective Tax Rate to the Statutory Federal Income Tax Rate	'
	A reconciliation of the Company’s effective tax rate to the statutory federal income tax rate for the years ended December 31, 2011, 2012 and 2013 is as follows:
		2011			2012			2013
	Statutory federal tax rate		35	%		35	%		35	%
	State income taxes, net of benefit		6			2			4
	Effect of foreign losses		(5	)		(1	)		—
	Non-deductible transaction costs		—			(3	)		—
	Non-deductible compensation		(19	)		(3	)		(1	)
	Other non-deductible expenses		13			—			(2	)
	Effect of uncertain tax positions		(5	)		(1	)		(1	)
	Changes in valuation allowance		(293	)		(35	)		(41	)
			(268	)%		(6	)%		(6	)%
Summary of Company's Deferred Tax Components	'
	The Company’s deferred tax components consisted of the following (in thousands):
		December 31,
		2012			2013
	Deferred tax assets:
	NOL carryforwards	$	27,481		$	29,864
	Allowance for doubtful accounts		51			47
	Deferred revenue		258			452
	Accrued expenses		2,188			906
	Intangible asset amortization		—			—
	Stock-based compensation		6,334			7,377
	Capital loss carryforward		1,787			1,786
	Other		1,274			1,528
	Total deferred tax assets		39,373			41,960
	Valuation allowance		(31,005	)		(39,402	)
	Net deferred tax assets		8,368			2,558
	Deferred tax liabilities:
	Capitalized software development		(590	)		(754	)
	Depreciation		(3,048	)		(2,280	)
	Goodwill and intangible asset amortization		(8,227	)		(3,394	)
	Other		(143	)		(302	)
	Total deferred tax liabilities		(12,008	)		(6,730	)
	Net deferred tax liability	$	(3,640	)	$	(4,172	)
Change in Unrecognized Tax Benefits, Excluding Accrued Interest	'
	The change in unrecognized tax benefits, excluding accrued interest, for the years ended December 31, 2012 and 2013, were as follows (in thousands):
		December 31,
		2012			2013
	Balance as of beginning of period	$	501		$	585
	Additions based on tax positions taken in the current year		80			78
	Additions for tax positions of prior years		4			76
	Balance as of end of period	$	585		$	739

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Future Minimum Lease Payments under Non-cancelable Operating and Capital Leases	'
	Future minimum lease payments under non-cancelable operating and capital leases at December 31, 2013 are as follows (in thousands):
		Operating		Capital
		Leases		Leases
	2014	$	4,025	$	150
	2015		3,976		110
	2016		3,852		83
	2017		2,722		1
	2018		2,024		—
	2019 and thereafter		8,597		—
	Total future minimum payments	$	25,196		344
	Less amount representing interest				(64	)
	Less current portion				(102	)
	Long-term capital lease obligations			$	178

Quarterly_Financial_Informatio1

Quarterly Financial Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Summary Consolidated Statement of Operations Data	'
	March 31,				June 30,			September 30,			December 31,			March 31,			June 30,			September 30,			December 31,
	2012(1)				2012			2012			2012			2013			2013			2013			2013
			(Dollars in thousands, except per share data)
	Summary consolidated statement of operations data:
	Revenues		$	34,853		$	43,620		$	45,217		$	47,114		$	46,247		$	46,617		$	46,615		$	47,452
	Gross profit			27,539			34,920			36,285			38,311			36,495			36,813			37,314			38,089
	Net loss			(10,825	)		(5,189	)		(3,845	)		(3,732	)		(8,125	)		(5,892	)		(3,851	)		(3,938	)
	Net loss per share:
	Basic and diluted		$	(0.57	)	$	(0.27	)	$	(0.20	)	$	(0.19	)	$	(0.41	)	$	(0.29	)	$	(0.19	)	$	(0.20	)
	Weighted average shares outstanding used in computing per share amounts:
	Basic and diluted			19,042,761			19,540,700			19,570,459			19,600,644			19,790,692			20,099,700			20,151,494			20,185,672
	-1	During the three months ended March 31, 2012, the Company incurred $2.9 million of acquisition-related transaction costs and $2.1 million of employee severance costs in connection with its acquisition of iContact.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	Segment
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Maturity period of liquid investments	'3 months or less	'	'
Available-for-sale securities	$0	'	'
Estimated useful life	'3 years	'	'
Amortization of intangible assets	12,034,000	10,999,000	2,501,000
Impairment charges for long-lived assets	301,000	709,000	100,000
Maximum period of measurement estimation after acquisition date	'One year	'	'
Deferred revenue recognized period	'Twelve month period	'	'
Advertising costs	22,700,000	23,400,000	8,900,000
Expected dividend yield	0	'	'
Percentage of assets located outside the United States	10.00%	9.00%	'
Revenues from sales to customers outside the United States	10.00%	11.00%	16.00%
Portion of the tax benefit	'Greater than 50 percent	'	'
Unrecognized tax benefits period	'12 months	'	'
Number of reportable business segment	1	'	'
Series A Redeemable Convertible Preferred Stock [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Securities excluded from diluted earnings per share	1,000,000	1,000,000	'
Accounts Receivable [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
No individual customer accounted for accounts receivable	'10% or more	'10% or more	'
Sales Revenue, Services, Net [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
No individual customer accounted for revenue	'10% or more	'10% or more	'10% or more
Employee Stock Option [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Securities excluded from diluted earnings per share	3,205,153	2,555,943	1,757,240
Restricted Stock [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Securities excluded from diluted earnings per share	937,536	979,790	1,282,323
Software [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Estimated useful life	'2 years	'	'
Capitalized Software Development Costs [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Amortization of intangible assets	$490,000	$499,000	$581,000
Minimum [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Estimated life of Long-Lived Assets	'2 years	'	'
Minimum [Member] | Information Database Costs [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Estimated useful life	'9 years	'	'
Minimum [Member] | Purchased Software, Computer and Office Equipment [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Estimated useful life of Property equipment software and office furniture	'3 years	'	'
Minimum [Member] | Furniture and Fixtures [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Estimated useful life of Property equipment software and office furniture	'5 years	'	'
Maximum [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Estimated life of Long-Lived Assets	'7 years	'	'
Maximum [Member] | Information Database Costs [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Estimated useful life	'13 years	'	'
Maximum [Member] | Purchased Software, Computer and Office Equipment [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Estimated useful life of Property equipment software and office furniture	'5 years	'	'
Maximum [Member] | Furniture and Fixtures [Member]	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Estimated useful life of Property equipment software and office furniture	'7 years	'	'

Business_Combinations_Addition

Business Combinations - Additional Information (Detail) (USD $)

3 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Feb. 24, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

iContact [Member]

iContact [Member]

iContact [Member]

North Social [Member]

North Social [Member]

North Social [Member]

Acquisition-Related Costs [Member]

Minimum [Member]

Maximum [Member]

Note Payable [Member]

Note Payable [Member]

Common Stock [Member]

Common Stock [Member]

Series A- Redeemable Convertible Preferred Stock [Member]

Convertible Preferred Stock [Member]

Cost of Revenues [Member]

Sales and Marketing [Member]

Research and Development [Member]

General and Administration [Member]

iContact [Member]

iContact [Member]

iContact [Member]

iContact [Member]

iContact [Member]

iContact [Member]

iContact [Member]

iContact [Member]

Loans At Acquisition Date [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquisition-related transaction cost

$2,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$2,900,000

Employee severance costs

2,100,000

'

'

'

'

2,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

52,000

691,000

637,000

691,000

Cash

'

'

'

'

90,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Promissory note (Escrow Note)

'

'

'

'

'

'

'

'

'

'

'

'

'

669,000

669,000

'

'

'

'

'

'

'

'

Common stock

'

'

'

'

406,554

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000

'

'

'

'

'

Common stock, value

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9,118,000

9,100,000

'

77,500,000

'

'

'

'

Total consideration

'

'

'

'

167,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net cash acquired

'

'

'

'

10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock, shares

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

72,656

'

'

'

'

'

'

Series A redeemable convertible preferred stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

85,090

'

'

'

'

'

Cash

'

'

'

'

6,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deposited in escrow for a period

'

'

'

'

'1 year

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Identifiable intangible assets amortized

'

'3 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Royalty rates used in relief

'

'

'

'

'

'

'

'

'

'

'

0.70%

12.00%

'

'

'

'

'

'

'

'

'

'

Estimate future cash flows discount rate

'

13.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred tax asset

'

'

'

'

20,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred tax liability

'

'

'

'

14,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Valuation allowance

'

'

'

'

6,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amortization of acquired intangible assets

'

12,034,000

10,999,000

2,501,000

'

1,500,000

10,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquisition-related transaction and severance costs

'

'

'

'

'

'

'

'

'

'

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Fair value adjustment for deferred revenue

'

'

2,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenue recognized since acquisition date

'

'

'

'

'

41,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net loss incurred since acquisition date

'

'

'

'

'

-4,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash

'

89,801,000

'

'

'

'

'

7,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchase consideration contingent cash

'

'

'

'

'

'

'

5,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Paid contingent consideration

'

'

'

'

'

'

'

'

4,600,000

7,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Identifiable intangible assets

'

'

'

'

'

'

'

101,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill deductible for tax purposes

'

'

'

'

'

'

'

11,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other net tangible assets

'

'

'

'

'

'

'

$78,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum period of contingent cash consideration payment

'

'

'

'

'

'

'

'

'

'24 months

'

'

'

'

'

'

'

'

'

'

'

'

'

Business_Combinations_Purchase

Business Combinations - Purchase Consideration for Acquisition (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Business Acquisition [Line Items]	'
Cash	$89,801,000
Total purchase consideration	177,078,000
Note Payable [Member]	'
Business Acquisition [Line Items]	'
Note payable	669,000
Common Stock [Member]	'
Business Acquisition [Line Items]	'
Common stock	9,118,000
Series A Redeemable Convertible Preferred Stock [Member]	'
Business Acquisition [Line Items]	'
Common stock	$77,490,000

Business_Combinations_Allocati

Business Combinations - Allocation of Purchase Price of Acquisition (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Purchase Price Allocation [Line Items]	'	'	'
Estimated useful life	'3 years	'	'
Goodwill	$177,264	$177,011	$38,029
iContact [Member]	'	'	'
Purchase Price Allocation [Line Items]	'	'	'
Cash and cash equivalents	10,000	'	'
Accounts receivable, net	96	'	'
Prepaid and other current assets	478	'	'
Property, equipment and software, net	2,625	'	'
Goodwill	138,860	'	'
Accounts payable and accrued liabilities	-5,911	'	'
Deferred revenue	-1,645	'	'
Other liabilities	-32	'	'
Total purchase price	177,078	'	'
iContact [Member] | Trade Names [Member]	'	'	'
Purchase Price Allocation [Line Items]	'	'	'
Estimated useful life	'3 years	'	'
Estimated Fair Value	1,400	'	'
iContact [Member] | Customer Relationships [Member]	'	'	'
Purchase Price Allocation [Line Items]	'	'	'
Estimated useful life	'3 years	'	'
Estimated Fair Value	19,166	'	'
iContact [Member] | Purchased Technology [Member]	'	'	'
Purchase Price Allocation [Line Items]	'	'	'
Estimated useful life	'3 years	'	'
Estimated Fair Value	$12,041	'	'

Business_Combinations_Pro_Form

Business Combinations - Pro Forma Information Results of Operation (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Business Combinations [Abstract]	'	'
Pro forma revenues	$180,403	$162,743
Pro forma net loss	($19,279)	($30,883)
Pro forma net loss per share:	'	'
Basic and diluted	($0.99)	($1.61)

Cash_Equivalents_and_Investmen2

Cash Equivalents and Investments - Components of Cash Equivalents and Investments (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cost	$34,740	$32,107	$98,284	$94,918
Cost	12,209	14,594	'	'
Unrealized Gains	'	2	'	'
Fair Market Value	0	'	'	'
Unrealized Losses	'	'	'	'
Fair Market Value	12,209	14,596	'	'
Money Market Funds [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cost	5,302	11,290	'	'
Unrealized Gains	'	'	'	'
Unrealized Losses	'	'	'	'
Fair Market Value	5,302	11,290	'	'
Certificates of Deposit [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cost	6,907	1,322	'	'
Unrealized Gains	'	'	'	'
Unrealized Losses	'	'	'	'
Fair Market Value	6,907	1,322	'	'
Certificates of Deposit [Member] | Short-term Investments [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cost	'	660	'	'
Unrealized Gains	'	2	'	'
Fair Market Value	'	662	'	'
Unrealized Losses	'	'	'	'
Certificates of Deposit [Member] | Long-term Investments [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cost	'	1,322	'	'
Unrealized Gains	'	'	'	'
Fair Market Value	'	1,322	'	'
Unrealized Losses	'	'	'	'

Cash_Equivalents_and_Investmen3

Cash Equivalents and Investments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'
Maturity date of cash equivalents	'3 months or less
Maximum [Member]	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'
Maturity date of short term investments	'1 year
Long-term investments original maturity dates	'5 years
Minimum [Member]	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'
Maturity date of short term investments	'3 months
Long-term investments original maturity dates	'1 year

Fair_Value_Measurements_Fair_V

Fair Value Measurements - Fair Value Measurements of Assets and Liabilities (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets:	'	'
Long-term investments	'	$1,322
Fair Value Measurements, Recurring [Member]	'	'
Assets:	'	'
Cash equivalents	12,209	12,612
Short-term investments	'	662
Long-term investments	'	1,322
Total assets measured at fair value	12,209	14,596
Accrued expenses:	'	'
Accrued contingent consideration, current portion	'	1,107
Total liabilities measured at fair value	'	1,107
Level 1 [Member] | Fair Value Measurements, Recurring [Member]	'	'
Assets:	'	'
Cash equivalents	12,209	12,612
Short-term investments	'	662
Long-term investments	'	1,322
Total assets measured at fair value	12,209	14,596
Accrued expenses:	'	'
Accrued contingent consideration, current portion	'	'
Total liabilities measured at fair value	'	'
Level 2 [Member] | Fair Value Measurements, Recurring [Member]	'	'
Assets:	'	'
Cash equivalents	'	'
Short-term investments	'	'
Long-term investments	'	'
Total assets measured at fair value	'	'
Accrued expenses:	'	'
Accrued contingent consideration, current portion	'	'
Total liabilities measured at fair value	'	'
Level 3 [Member] | Fair Value Measurements, Recurring [Member]	'	'
Assets:	'	'
Cash equivalents	'	'
Short-term investments	'	'
Long-term investments	'	'
Total assets measured at fair value	'	'
Accrued expenses:	'	'
Accrued contingent consideration, current portion	'	1,107
Total liabilities measured at fair value	'	$1,107

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value Disclosures [Abstract]	'	'	'
Additional Expense	$3,453	$1,176	$1,900

Fair_Value_Measurements_Change

Fair Value Measurements - Changes in Fair Value of Acquisition Related Contingent Consideration (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value Disclosures [Abstract]	'	'	'
Balance as of beginning of period	$1,107	$7,537	'
Adjustments to fair value measurements	3,453	1,176	1,900
Payment of contingent consideration	-4,560	-7,606	'
Balance as of end of period	'	$1,107	$7,537

Property_Equipment_and_Softwar2

Property Equipment and Software - Summary of Property, Equipment and Software (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property Plant and Equipment Gross	$36,426	$31,436
Less accumulated depreciation and amortization	-16,292	-11,368
Property, equipment and software, net	20,134	20,068
Purchased Software, Computer and Office Equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property Plant and Equipment Gross	14,397	12,539
Furniture and Fixtures [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property Plant and Equipment Gross	2,397	2,030
Leasehold Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property Plant and Equipment Gross	13,471	11,499
Equipment Under Capital Lease Obligations [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property Plant and Equipment Gross	560	569
Capitalized Software Development Costs [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property Plant and Equipment Gross	2,762	1,960
Information Database Costs [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property Plant and Equipment Gross	$2,839	$2,839

Property_Equipment_and_Softwar3

Property Equipment and Software - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property Plant And Equipment [Abstract]	'	'	'
Depreciation and amortization expense	$5,501	$4,844	$2,655

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]	'	'
Balance as of beginning of period	$177,011	$38,029
Goodwill acquired	'	138,860
Effects of foreign currency translation	253	122
Balance as of end of period	$177,264	$177,011

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Details of Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$42,567	$42,367
Amortization	-27,762	-15,616
Net Carrying Amount	14,805	26,751
Customer Relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Weighted- Average Amortization Period	'3 years 8 months 12 days	'3 years 8 months 12 days
Gross Carrying Amount	23,376	23,221
Amortization	-14,074	-7,014
Net Carrying Amount	9,302	16,207
Trade Names [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Weighted- Average Amortization Period	'5 years 10 months 24 days	'5 years 10 months 24 days
Gross Carrying Amount	5,695	5,686
Amortization	-5,058	-4,192
Net Carrying Amount	637	1,494
Purchased Technology [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Weighted- Average Amortization Period	'3 years 1 month 6 days	'3 years 1 month 6 days
Gross Carrying Amount	13,496	13,460
Amortization	-8,630	-4,410
Net Carrying Amount	$4,866	$9,050

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill And Intangible Assets Disclosure [Abstract]	'	'	'
Amortization of intangible assets	$12,034	$10,999	$2,501

Goodwill_and_Intangible_Assets5

Goodwill and Intangible Assets - Future Expected Amortization of Intangible Assets (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Finite Lived Intangible Assets Future Amortization Expense [Abstract]	'	'
2014	$11,720	'
2015	2,352	'
2016	575	'
2017	158	'
Net Carrying Amount	$14,805	$26,751

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012
		Revolving Credit Facility [Member]	Maryland [Member]	Maryland [Member]	Prince George's County [Member]	Prince George's County [Member]	iContact [Member]	iContact [Member]
			Term Loan [Member]	Term Loan [Member]	Term Loan [Member]	Term Loan [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'
Loan agreements	'	'	$500,000	$400,000	$100,000	$40,000	'	'
Interest rate on term loan	'	'	'	'	3.00%	3.00%	'	'
Outstanding balance of loans	'	'	'	'	1,000,000	'	'	'
Loan agreement term ending period	'	'	31-Dec-20	31-Dec-20	31-Dec-16	31-Dec-20	'	'
Purchase consideration for the acquisition in the form of promissory note	'	'	'	'	'	'	669,000	'
Escrow note interest rate	'	'	'	'	'	'	1.00%	'
Outstanding borrowings	'	0	'	'	'	'	'	669,000
Escrow note expiration period	'	'	'	'	'	'	'2013-02	'
Debt instrument description	'	'BBA LIBOR Daily Floating Rate plus 2.25%	'	'	'	'	'	'
Interest on borrowings	'	2.25%	'	'	'	'	'	'
End date of the revolving credit facility	'	27-Feb-13	'	'	'	'	'	'
Payment of fee on unused funds	'	0.40%	'	'	'	'	'	'
Shares pledged of foreign subsidiaries, percentage	'	65.00%	'	'	'	'	'	'
Outstanding letters of credit	'	1,300,000	'	'	'	'	'	'
Available to borrow under revolving credit facility	'	13,700,000	'	'	'	'	'	'
Revolving credit facility	'	$15,000,000	'	'	'	'	'	'
Revolving credit facility Extended	'April 15, 2014	'	'	'	'	'	'	'

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)

12 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Feb. 24, 2012

Dec. 31, 2013

Dec. 31, 2013

13-May-13

Feb. 24, 2012

Dec. 31, 2013

Dec. 31, 2012

Feb. 29, 2012

Dec. 31, 2013

31-May-13

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Aug. 31, 2011

Nov. 30, 2008

Minimum [Member]

Maximum [Member]

Series A Redeemable Convertible Preferred Stock [Member]

Series A Redeemable Convertible Preferred Stock [Member]

Series A Redeemable Convertible Preferred Stock [Member]

Series A Redeemable Convertible Preferred Stock [Member]

Series A Redeemable Convertible Preferred Stock [Member]

Series B Preferred Stock [Member]

Series B Preferred Stock [Member]

Series A Preferred Stock Conversion on or Before February 24, 2017 [Member]

Series A Preferred Stock Conversion on or After February 25, 2017 [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Common Stock [Member]

Common Stock [Member]

Right

Class of Stock [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Undesignated shares of capital stock

10,000,000

10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Authorized preferred stock

'

'

'

'

'

'

'

'

'

'

1,000,000

'

100,000

'

'

'

'

'

'

'

Issued shares of Series A Redeemable Convertible Preferred Stock

'

'

'

'

'

'

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Preferred stock issued

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

Preferred stock outstanding

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

Series A Convertible preferred stock, issued

'

'

'

'

'

'

'

1,000,000

1,000,000

1,000,000

'

'

'

'

'

'

'

'

'

'

Redeemable convertible preferred stock with deemed fair value at issuance

'

'

'

$77,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Liquidation preference

$77.30

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Redeem each issued and outstanding share

'

'

'

'

'

'

'

$77.30

'

'

'

'

'

'

'

'

'

'

'

'

Convertible common stock

'

'

'

'

'

'

'

'

'

'

'

'

'

3.0256

3.3282

'

'

'

'

'

Description of conversion of stock

'conversions occurring on or before February 24, 2017 On and after February 25, 2017

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding shares common stock

'

'

'

'

'

'

'

'

5.00%

'

'

'

'

'

'

'

'

'

'

'

Percentage of preferred stockholders own in issued and outstanding capital stock

'

'

'

5.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Rights for outstanding share of Preferred Stock to stockholders

'

'

'

'

'

'

3.0256

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of rights declared as dividend distribution for each share of common stock

'

'

'

'

'

'

1

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock price, per one one-thousandth of a share

'

'

'

'

'

'

'

'

'

'

'

$46

'

'

'

'

'

'

'

'

Percentage of common stock to be acquired for exercise of rights

'

'

'

'

20.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of rights acquired for outstanding common stock beneficial ownership

'

'

'

'

20.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of rights acquired for outstanding common stock, beneficially owns

'

'

'

'

20.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of outstanding common stock acquires additional shares

'

'

'

'

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of common stock acquired in beneficial ownership

'

'

'

'

20.00%

25.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Redemption price per Right

$0.00

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of Acquisition of outstanding Share Capital

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Exchange ratio of newly issued share

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Expiration Date of rights

13-May-16

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Expiration Date of Rights Period

'30 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchase price of common stock, shares

0

0

850,031

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock repurchases during the period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

30,000,000

30,000,000

Purchase price of common stock

'

'

16,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum statutory tax withholding obligations

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$477,000

$3,100,000

$3,200,000

'

'

Shares repurchased

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

35,695

143,789

128,678

'

'

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Stock reserved for issuance	9,409,919	'	'
Stock option granted term	'10 years	'	'
Stock option/ Restricted stock award vest in period	'4 years	'	'
Shares available for future grants	714,301	'	'
Weighted-average grant date fair value of stock options granted	$7.29	$7.36	$13.03
Fair value of stock options vested	$4,400,000	$3,500,000	$4,800,000
Aggregate intrinsic value of stock options exercised	36,000	105,000	15,500,000
Restricted Stock [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Stock option/ Restricted stock award vest in period	'4 years	'	'
Unrecognized stock-based compensation cost	10,400,000	'	'
Period for recognition of unrecognized stock-based compensation	'2 years 4 months 24 days	'	'
Employee Stock Option [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Unrecognized stock-based compensation cost	$10,600,000	'	'
Period for recognition of unrecognized stock-based compensation	'2 years 6 months	'	'

StockBased_Compensation_Compon

Stock-Based Compensation - Components of Stock-Based Compensation Expense for Equity Awards Recorded in the Consolidated Statements of Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total	$12,327	$14,872	$14,915
Cost of Revenues [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total	1,356	1,514	1,575
Sales and Marketing [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total	3,162	4,299	4,126
Research and Development [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total	1,933	2,646	2,079
General and Administration [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total	$5,876	$6,413	$7,135

StockBased_Compensation_Weight

Stock-Based Compensation - Weighted Average Assumptions Used in Calculating Fair Value of Stock Options Awards Granted (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'	'
Stock price volatility	59.00%	60.00%	57.00%
Expected term (years)	'6 years 1 month 6 days	'5 years 8 months 12 days	'6 years 1 month 6 days
Risk-free interest rate	1.20%	1.10%	2.20%
Dividend yield	0.00%	0.00%	0.00%

StockBased_Compensation_Summar

Stock-Based Compensation - Summary of Stock Option Activity (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'
Number of Options, Outstanding, Beginning Balance	2,555,943
Number of Options, Granted	946,355
Number of Options, Exercised	-11,583
Number of Options, Forfeited or cancelled	-285,562
Number of Options, Outstanding, Ending Balance	3,205,153
Number of Options, Vested and expected to vest, Ending Balance	3,124,090
Number of Options, Exercisable, Ending Balance	1,433,554
Weighted-Average Exercise Price per Share, Outstanding, Beginning Balance	$15.93
Weighted-Average Exercise Price per Share, Granted	$13.33
Weighted-Average Exercise Price per Share, Exercised	$7.44
Weighted-Average Exercise Price per Share, Forfeited or cancelled	$14.37
Weighted-Average Exercise Price per Share, Outstanding, Ending Balance	$15.33
Weighted-Average Exercise Price per Share, Vested and expected to vest, Ending Balance	$15.37
Weighted-Average Exercise Price per Share, Exercisable, Ending Balance	$15.78
Weighted-Average Contractual Term, Outstanding, Ending Balance	'7 years
Weighted-Average Contractual Term, Vested and expected to vest, Ending Balance	'7 years
Weighted-Average Contractual Term, Exercisable, Ending Balance	'5 years 2 months 12 days
Aggregate Intrinsic Value, Outstanding, Ending Balance	$1,202
Aggregate Intrinsic Value, Vested and expected to vest, Ending Balance	1,189
Aggregate Intrinsic Value, Exercisable, Ending Balance	$1,038
Minimum [Member]	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'
Range of Exercise Prices, Outstanding, Beginning Balance	$2.46
Range of Exercise Prices, Granted	$8.22
Range of Exercise Prices, Exercised	$2.46
Range of Exercise Prices, Forfeited or cancelled	$2.46
Range of Exercise Prices, Outstanding, Ending Balance	$3.99
Range of Exercise Prices, Vested and expected to vest	$3.99
Range of Exercise Prices, Exercisable, Ending Balance	$3.99
Maximum [Member]	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'
Range of Exercise Prices, Outstanding, Beginning Balance	$35.98
Range of Exercise Prices, Granted	$17.54
Range of Exercise Prices, Exercised	$9
Range of Exercise Prices, Forfeited or cancelled	$31.03
Range of Exercise Prices, Outstanding, Ending Balance	$35.98
Range of Exercise Prices, Vested and expected to vest	$35.98
Range of Exercise Prices, Exercisable, Ending Balance	$35.98

StockBased_Compensation_Summar1

Stock-Based Compensation - Summary of Outstanding Stock Options (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Summary of Investment Holdings [Line Items]	'
Options Outstanding, Ending Balance	3,205,153
Options Outstanding, Weighted Average Remaining Contractual Term	'7 years
Options Outstanding, Weighted Average Exercise Price per Share	$15.33
Options Exercisable, Ending Balance	1,433,554
Options Exercisable, Weighted Average Exercise Price per Share	$15.78
Range One [Member]	'
Summary of Investment Holdings [Line Items]	'
Exercise Prices, Lower Range Limit	$3.99
Exercise Prices, Upper Range Limit	$10
Options Outstanding, Ending Balance	479,193
Options Outstanding, Weighted Average Remaining Contractual Term	'3 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price per Share	$8.88
Options Exercisable, Ending Balance	402,729
Options Exercisable, Weighted Average Exercise Price per Share	$8.81
Range Two [Member]	'
Summary of Investment Holdings [Line Items]	'
Exercise Prices, Lower Range Limit	$10.01
Exercise Prices, Upper Range Limit	$13
Options Outstanding, Ending Balance	215,888
Options Outstanding, Weighted Average Remaining Contractual Term	'8 years 3 months 18 days
Options Outstanding, Weighted Average Exercise Price per Share	$12.47
Options Exercisable, Ending Balance	51,621
Options Exercisable, Weighted Average Exercise Price per Share	$12.55
Range Three [Member]	'
Summary of Investment Holdings [Line Items]	'
Exercise Prices, Lower Range Limit	$13.01
Exercise Prices, Upper Range Limit	$13.25
Options Outstanding, Ending Balance	555,962
Options Outstanding, Weighted Average Remaining Contractual Term	'8 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price per Share	$13.25
Options Exercisable, Ending Balance	169,311
Options Exercisable, Weighted Average Exercise Price per Share	$13.24
Range Four [Member]	'
Summary of Investment Holdings [Line Items]	'
Exercise Prices, Lower Range Limit	$13.26
Exercise Prices, Upper Range Limit	$14
Options Outstanding, Ending Balance	675,391
Options Outstanding, Weighted Average Remaining Contractual Term	'9 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price per Share	$13.94
Options Exercisable, Ending Balance	12,190
Options Exercisable, Weighted Average Exercise Price per Share	$13.94
Range Five [Member]	'
Summary of Investment Holdings [Line Items]	'
Exercise Prices, Lower Range Limit	$14.01
Exercise Prices, Upper Range Limit	$17
Options Outstanding, Ending Balance	475,177
Options Outstanding, Weighted Average Remaining Contractual Term	'6 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price per Share	$14.79
Options Exercisable, Ending Balance	322,033
Options Exercisable, Weighted Average Exercise Price per Share	$14.75
Range Six [Member]	'
Summary of Investment Holdings [Line Items]	'
Exercise Prices, Lower Range Limit	$17.01
Exercise Prices, Upper Range Limit	$23
Options Outstanding, Ending Balance	253,996
Options Outstanding, Weighted Average Remaining Contractual Term	'6 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price per Share	$19.03
Options Exercisable, Ending Balance	129,996
Options Exercisable, Weighted Average Exercise Price per Share	$19.58
Range Seven [Member]	'
Summary of Investment Holdings [Line Items]	'
Exercise Prices, Lower Range Limit	$23.01
Exercise Prices, Upper Range Limit	$35.98
Options Outstanding, Ending Balance	549,546
Options Outstanding, Weighted Average Remaining Contractual Term	'6 years 10 months 24 days
Options Outstanding, Weighted Average Exercise Price per Share	$24.68
Options Exercisable, Ending Balance	345,674
Options Exercisable, Weighted Average Exercise Price per Share	$25.21

StockBased_Compensation_Summar2

Stock-Based Compensation - Summary of Restricted Stock Award Activity (Detail) (Restricted Stock Awards [Member], USD $)	12 Months Ended
	Dec. 31, 2013
Restricted Stock Awards [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of Shares Underlying Stock Awards, Beginning Balance nonvested	979,790
Number of Shares Underlying Stock Awards, Awarded	654,485
Number of shares Underlying Stock Awards, Vested	-556,714
Number of shares Underlying Stock Awards, Forfeited	-140,025
Number of Shares Underlying Stock Awards, Ending Balance nonvested	937,536
Weighted-Average Grant-date Fair Value, Beginning Balance nonvested	$17.12
Weighted-Average Grant-date Fair Value, Awarded	$13.17
Weighted-Average Grant-date Fair Value, Vested	$16.23
Weighted-Average Grant-date Fair-Value, Forfeited	$15.19
Weighted-Average Grant-date Fair Value, Ending Balance nonvested	$15.18

Employee_Benefit_Plans_Additio

Employee Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Benefit Plans Textual [Abstract]	'	'	'
Total expenses	$1,100,000	$1,000,000	$747,000

Income_Taxes_US_and_Foreign_Co

Income Taxes - U.S. and Foreign Components of Income (Loss) Before Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
Domestic	($17,700)	($20,848)	($4,906)
Foreign	-2,901	-1,316	948
Loss before provision for income taxes	($20,601)	($22,164)	($3,958)

Income_Taxes_Summary_of_Income

Income Taxes - Summary of Income Tax Provision (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current expense	'	'	'
Federal	'	'	$26
State	-25	34	6
Foreign	727	696	665
Total current expense	702	730	697
Deferred expense	'	'	'
Federal	723	751	9,282
State	73	94	884
Foreign	-293	-148	-244
Total deferred expense	503	697	9,922
Total provision for income taxes	$1,205	$1,427	$10,619

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of the Company's Effective Tax Rate to the Statutory Federal Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
Statutory federal tax rate	35.00%	35.00%	35.00%
State income taxes, net of benefit	4.00%	2.00%	6.00%
Effect of foreign losses	'	-1.00%	-5.00%
Non-deductible transaction costs	'	-3.00%	'
Non-deductible compensation	-1.00%	-3.00%	-19.00%
Other non-deductible expenses	-2.00%	'	13.00%
Effect of uncertain tax positions	-1.00%	-1.00%	-5.00%
Changes in valuation allowance	-41.00%	-35.00%	-293.00%
Effective income tax rate	-6.00%	-6.00%	-268.00%

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Line Items]	'	'	'
Tax Benefit	'	'	$0
Increased Valuation of net U.S. deferred tax assets	'	'	11,800,000
Net deferred tax asset	2,558,000	8,368,000	'
Net U.S. deferred tax assets For Foreign subsidiaries	0	'	'
Amount of difference related to undistributed earnings of investments in foreign subsidiaries	0	'	'
Maturity period of net operating loss, start	'2025	'	'
Maturity period of net operating loss, end	'2033	'	'
Non-expiring Alternative Minimum Tax credit	390,000	'	'
Non-expiring losses	14,400,000	'	'
Expiring losses	1,300,000	'	'
Total provision for income taxes	5,400,000	'	'
Withholding tax dividend percentage	3.00%	'	'
Accumulated earnings	-94,137,000	-72,331,000	'
Additional income tax expense	150,000	'	'
Unrecognized tax benefits	1,100,000	933,000	'
Interest and Penalties related to uncertain tax positions	567,000	492,000	'
Total amount of gross unrecognized tax benefits	1,300,000	1,100,000	'
Interest expense	76,000	56,000	'
Federal and State R&D Tax Credit [Member]	'	'	'
Income Tax Disclosure [Line Items]	'	'	'
Tax credit	1,000,000	'	'
Alternative minimum tax credit, start	'2017	'	'
Alternative minimum tax credit, end	'2033	'	'
French Subsidiary [Member]	'	'	'
Income Tax Disclosure [Line Items]	'	'	'
Accumulated earnings	5,000,000	'	'
Federal and State [Member]	'	'	'
Income Tax Disclosure [Line Items]	'	'	'
Net deferred tax asset	'	'	0
Federal Tax [Member]	'	'	'
Income Tax Disclosure [Line Items]	'	'	'
Net operating loss (NOL) carryforwards	85,000,000	'	'
State Tax [Member]	'	'	'
Income Tax Disclosure [Line Items]	'	'	'
Net operating loss (NOL) carryforwards	41,700,000	'	'
Tax credit	285,000	'	'
Alternative minimum tax credit, start	'2014	'	'
Alternative minimum tax credit, end	'2017	'	'
Foreign Subsidiaries [Member]	'	'	'
Income Tax Disclosure [Line Items]	'	'	'
Net operating loss (NOL) carryforwards	$15,700,000	'	'
Maturity period of net operating loss for foreign subsidiaries, start	'2020	'	'
Maturity period of net operating loss for foreign subsidiaries, end	'2023	'	'

Income_Taxes_Summary_of_Compan

Income Taxes - Summary of Company's Deferred Tax Components (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Deferred tax assets:	'	'
NOL carryforwards	$29,864	$27,481
Allowance for doubtful accounts	47	51
Deferred revenue	452	258
Accrued expenses	906	2,188
Intangible asset amortization	'	'
Stock-based compensation	7,377	6,334
Capital loss carryforward	1,786	1,787
Other	1,528	1,274
Total deferred tax assets	41,960	39,373
Valuation allowance	-39,402	-31,005
Net deferred tax assets	2,558	8,368
Deferred tax liabilities:	'	'
Capitalized software development	-754	-590
Depreciation	-2,280	-3,048
Goodwill and intangible asset amortization	-3,394	-8,227
Other	-302	-143
Total deferred tax liabilities	-6,730	-12,008
Net deferred tax liability	($4,172)	($3,640)

Income_Taxes_Change_in_Unrecog

Income Taxes - Change in Unrecognized Tax Benefits, Excluding Accrued Interest (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]	'	'
Balance as of beginning of period	$585	$501
Additions based on tax positions taken in the current year	78	80
Additions for tax positions of prior years	76	4
Balance as of end of period	$739	$585

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitment And Contingencies [Line Items]	'	'	'
Generally contain renewal options	'Up to five years	'	'
Deferred rent included in accrued expenses	$783,000	$752,000	'
Deferred rent included in other liabilities	5,000,000	5,700,000	'
Rent expense	5,200,000	5,000,000	2,900,000
Minimum required payments in future years under arrangements 2014	5,800,000	'	'
Minimum required payments in future years under arrangements 2015	2,800,000	'	'
Minimum required payments in future years under arrangements 2016	1,000,000	'	'
Letter of credit	$1,300,000	'	'
Expiry of letters of credit	31-May-23	'	'
Machinery and Equipment [Member]	'	'	'
Commitment And Contingencies [Line Items]	'	'	'
Lease expiration year	'2017	'	'
Land and Building [Member]	'	'	'
Commitment And Contingencies [Line Items]	'	'	'
Lease expiration year	'2023	'	'

Commitments_and_Contingencies_2

Commitments and Contingencies - Future Minimum Lease Payments under Non-cancelable Operating and Capital Leases (Detail) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Commitments And Contingencies Disclosure [Abstract]	'
Operating Leases, 2014	$4,025
Operating Leases, 2015	3,976
Operating Leases, 2016	3,852
Operating Leases, 2017	2,722
Operating Leases, 2018	2,024
Operating Leases, 2019 and thereafter	8,597
Operating Leases, Total future minimum payments	25,196
2014	150
2015	110
2016	83
2017	1
2018	'
2019 and thereafter	'
Total future minimum payments	344
Less amount representing interest	-64
Less current portion	-102
Long-term capital lease obligations	$178

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (Subsequent Event [Member], USD $)	0 Months Ended	1 Months Ended
In Millions, unless otherwise specified	Jan. 23, 2014	Feb. 28, 2014
Subsequent Event [Member]	'	'
Subsequent Event [Line Items]	'	'
North Venture Partner's complaint seeks an award for damages	$6.40	'
Estimated expenses	'	$5

Quarterly_Financial_Informatio2

Quarterly Financial Information (Unaudited) - Summary Consolidated Statement of Operations Data (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Selected Quarterly Financial Information [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Revenues	$47,452	$46,615	$46,617	$46,247	$47,114	$45,217	$43,620	$34,853	$186,931	$170,804	$114,874
Gross profit	38,089	37,314	36,813	36,495	38,311	36,285	34,920	27,539	148,711	137,055	93,017
Net loss	($3,938)	($3,851)	($5,892)	($8,125)	($3,732)	($3,845)	($5,189)	($10,825)	($21,806)	($23,591)	($14,577)
Net loss per share:	'	'	'	'	'	'	'	'	'	'	'
Basic and diluted	($0.20)	($0.19)	($0.29)	($0.41)	($0.19)	($0.20)	($0.27)	($0.57)	'	'	'
Weighted average shares outstanding used in computing per share amounts:	'	'	'	'	'	'	'	'	'	'	'
Basic and diluted	20,185,672	20,151,494	20,099,700	19,790,692	19,600,644	19,570,459	19,540,700	19,042,761	'	'	'

Quarterly_Financial_Informatio3

Quarterly Financial Information (Unaudited) - Summary Consolidated Statement of Operations Data (Parenthetical) (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2012
Selected Quarterly Financial Information [Abstract]	'
Acquisition-related transaction cost	$2.90
Employee severance costs	$2.10

Schedule_II_Valuation_and_Qual1

Schedule II - Valuation and Qualifying Accounts (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts [Member]	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'
Balance at Beginning of Period	$236	$244	$182
Charged to Costs or Expenses	638	408	408
Additions (Deductions)	-640	-416	-346
Additions Acquired from Business Combinations	'	'	'
Balance at End of Period	234	236	244
Deferred Tax Valuation Allowance [Member]	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'
Balance at Beginning of Period	31,005	13,654	1,997
Charged to Costs or Expenses	9,308	8,236	11,657
Additions (Deductions)	-911	2,859	'
Additions Acquired from Business Combinations	'	6,256	'
Balance at End of Period	$39,402	$31,005	$13,654