Demandware (DWRE) 10-K 3 Mar 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Feb. 24, 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	'DEMANDWARE INC	'	'
Entity Central Index Key	'0001301031	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	35,387,120	'
Entity Public Float	'	'	$834

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$242,425	$58,877
Short-term investments	37,133	48,251
Accounts receivable-net of allowance for doubtful accounts of $459 and $0 at December 31, 2013 and 2012, respectively	28,402	19,214
Prepaid expenses and other current assets	4,315	3,452
Total current assets	312,275	129,794
Property and equipment, net	9,790	8,377
Other assets	1,866	1,157
Total assets	323,931	139,328
Current liabilities:	'	'
Current portion of notes payable	2,727	3,021
Accounts payable	3,174	3,168
Accrued expenses	17,362	8,348
Deferred revenue	19,609	11,105
Deferred rent	184	127
Total current liabilities	43,056	25,769
Long-term liabilities:	'	'
Deferred revenue	18,862	15,647
Notes payable	1,524	2,353
Deferred rent	884	969
Total liabilities	64,326	44,738
Stockholders' equity:	'	'
Preferred stock, $0.01 par value per share-10,000 shares authorized	'	'
Common stock, $0.01 par value per share-240,000 shares authorized; 34,268 and 29,842 shares issued and outstanding at December 31, 2013 and 2012, respectively	343	298
Additional paid-in capital	356,766	170,997
Accumulated other comprehensive gain (loss)	64	-17
Accumulated deficit	-97,568	-76,688
Total stockholders' equity	259,605	94,590
Total liabilities and stockholders' equity	$323,931	$139,328

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Per Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Accounts receivable, allowance for doubtful accounts	$459	$0
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	10,000	10,000
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	240,000	240,000
Common stock, shares issued	34,268	29,842
Common stock, shares outstanding	34,268	29,842

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Loss (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue:	'	'	'
Subscription	$95,733	$67,930	$47,219
Services	8,003	11,545	9,328
Total revenue	103,736	79,475	56,547
Cost of revenue:	'	'	'
Subscription	17,157	13,015	9,511
Services	10,860	11,326	10,196
Total cost of revenue	28,017	24,341	19,707
Gross profit	75,719	55,134	36,840
Operating expenses:	'	'	'
Sales and marketing	52,384	33,496	19,847
Research and development	20,787	15,085	11,182
General and administrative	23,337	13,712	6,567
Total operating expenses	96,508	62,293	37,596
Loss from operations	-20,789	-7,159	-756
Other income (expense):	'	'	'
Interest income	210	162	8
Interest expense	-255	-355	-280
Other income (expense)	528	-351	-171
Other income (expense), net	483	-544	-443
(Loss) income before provision for income taxes	-20,306	-7,703	-1,199
Provision for income taxes	574	421	212
Net loss	-20,880	-8,124	-1,411
Accretion of redeemable preferred stock	'	-1,172	-5,274
Net loss attributable to common stockholders	-20,880	-9,296	-6,685
Net loss per share attributable to common stockholders, basic and diluted	($0.68)	($0.39)	($1.75)
Weighted average common shares outstanding, basic and diluted	30,795	24,063	3,823
Other comprehensive (loss) income, net of tax:	'	'	'
Foreign currency translation adjustments	93	22	-29
Unrealized (loss) gain on marketable securities	-12	14	'
Comprehensive loss	($20,799)	($8,088)	($1,440)

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (Deficit) (USD $)	Total	Common Stock $0.01 par value per share [Member]	Additional Paid-In Capital [Member]	Note Receivable From Stockholder [Member]	Accumulated Comprehensive (Loss) Income [Member]	Accumulated Deficit [Member]
In Thousands, except Share data
BALANCE at Dec. 31, 2010	($81,114)	$29	'	($74)	($24)	($81,045)
BALANCE, Shares at Dec. 31, 2010	'	2,938,000	'	'	'	'
Stock-based compensation	1,489	'	1,489	'	'	'
Forgiveness of note receivable	74	'	'	74	'	'
Exercise of common stock options	1,645	16	1,629	'	'	'
Exercise of common stock options, Shares	'	1,531,000	'	'	'	'
Accretion of preferred stock to redemption value	-5,274	'	-3,118	'	'	-2,156
Net loss	-1,411	'	'	'	'	-1,411
Other comprehensive income	-29	'	'	'	-29	'
BALANCE at Dec. 31, 2011	-84,620	45	'	'	-53	-84,612
BALANCE, Shares at Dec. 31, 2011	'	4,469,000	'	'	'	'
Stock-based compensation	7,043	'	7,043	'	'	'
Exercise of common stock options	1,282	9	1,273	'	'	'
Exercise of common stock options, Shares	'	913,000	'	'	'	'
Accretion of preferred stock to redemption value	-1,172	'	-17,220	'	'	16,048
Vesting of restricted stock	'	1	-1	'	'	'
Vesting of restricted stock, Shares	'	86,000	'	'	'	'
Exercise of common stock warrant, Shares	'	20,000	'	'	'	'
Issuance of common stock in connection with initial public offering / public offering, net of issuance costs	90,837	63	90,774	'	'	'
Issuance of common stock in connection with initial public offering / public offering, Shares	'	6,325,000	'	'	'	'
Conversion of redeemable convertible preferred stock into common stock	88,775	180	88,595	'	'	'
Conversion of redeemable convertible preferred stock into common stock, Shares	'	18,029,000	'	'	'	'
Reclassification of a warrant to purchase shares of redeemable convertible preferred stock into a warrant to purchase common stock	533	'	533	'	'	'
Net loss	-8,124	'	'	'	'	-8,124
Other comprehensive income	36	'	'	'	36	'
BALANCE at Dec. 31, 2012	94,590	298	170,997	'	-17	-76,688
BALANCE, Shares at Dec. 31, 2012	'	29,842,000	'	'	'	'
Stock-based compensation	14,688	'	14,688	'	'	'
Exercise of common stock options	7,948	13	7,935	'	'	'
Exercise of common stock options, Shares	1,247,000	1,247,000	'	'	'	'
Vesting of restricted stock	'	2	-2	'	'	'
Vesting of restricted stock, Shares	'	167,000	'	'	'	'
Exercise of common stock through employee stock purchase program	544	'	544	'	'	'
Exercise of common stock through employee stock purchase program, Shares	'	15,000	'	'	'	'
Issuance of common stock in connection with initial public offering / public offering, net of issuance costs	162,634	30	162,604	'	'	'
Issuance of common stock in connection with initial public offering / public offering, Shares	'	2,997,000	'	'	'	'
Net loss	-20,880	'	'	'	'	-20,880
Other comprehensive income	81	'	'	'	81	'
BALANCE at Dec. 31, 2013	$259,605	$343	$356,766	'	$64	($97,568)
BALANCE, Shares at Dec. 31, 2013	'	34,268,000	'	'	'	'

Consolidated_Statements_of_Sto1

Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical) (Additional Paid-In Capital [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Additional Paid-In Capital [Member]	'	'
Issuance of common stock in connection with initial public offering / public offering, issuance costs	$482	$3,279

Consolidated_Statement_of_Cash

Consolidated Statement 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	($20,880)	($8,124)	($1,411)
Adjustments to reconcile net loss to net cash provided by operating activities:	'	'	'
Depreciation and amortization	4,385	3,439	2,884
(Gain) loss on disposal of property and equipment	'	-3	80
Re-measurement of preferred stock warrant liability	'	426	49
Bad debt expense	497	'	'
Stock-based compensation	14,688	7,043	1,489
Deferred rent expense	-33	357	306
Write-off of other current asset	698	'	'
Other non-cash reconciling items	586	209	105
Changes in operating assets and liabilities:	'	'	'
Accounts receivable	-9,684	-2,285	-5,355
Prepaid expenses and other current assets	-973	-1,011	-422
Other long-term assets	-525	203	-20
Accounts payable	-274	1,016	-108
Accrued expenses	8,843	1,224	3,213
Deferred revenue	11,719	583	-99
Net cash provided by operating activities	9,047	3,077	711
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'	'
Purchase of property and equipment	-5,560	-3,846	-3,473
Purchase of marketable securities	-56,921	-63,239	'
Sale and maturity of marketable securities	67,464	14,828	'
Proceeds from sale of property and equipment	'	'	25
Increase in restricted cash and other assets	-171	-357	-63
Net cash provided by (used in) investing activities	4,812	-52,614	-3,511
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'
Proceeds from initial public offering, net of underwriting discounts and commissions	'	94,116	'
Proceeds from follow-on public offering, net of underwriting discounts and commissions	162,634	'	'
Proceeds from shares purchased under Employee Stock Purchase Plan	544	'	'
Proceeds from exercise of stock options	7,948	1,282	1,645
Deferred offering costs	'	-1,604	-1,674
Proceeds from issuance of notes payable	1,997	2,757	2,570
Payments of equipment notes	-2,757	-2,674	-1,884
Payments of software financing agreement	-944	-471	'
Net cash provided by financing activities	169,422	93,406	657
EFFECT OF EXCHANGE RATES ON CASH AND CASH EQUIVALENTS	267	69	-66
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	183,548	43,938	-2,209
CASH AND CASH EQUIVALENTS-Beginning of year	58,877	14,939	17,148
CASH AND CASH EQUIVALENTS-End of year	242,425	58,877	14,939
SUPPLEMENTARY INFORMATION:	'	'	'
Interest paid	242	282	250
Income taxes paid	297	200	203
NONCASH INVESTING AND FINANCING ACTIVITIES:	'	'	'
Conversion of redeemable convertible preferred stock to common stock	'	88,775	'
Conversion of preferred stock warrant to common stock warrant	'	533	'
Deferred offering costs included in accounts payable and accrued expenses	'	'	44
Purchase of property and equipment included in accounts payable and accrued expenses	554	350	'
Software license acquired by assuming directly related liabilities	'	1,212	'
Software license technical support acquired by assuming directly related liabilities	$561	$549	'

Organization

Organization	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Organization	'
	1. ORGANIZATION
	Company Overview—Demandware, Inc. (the “Company”) provides enterprise-class cloud-based digital commerce solutions that enable companies to design, implement and manage their own customized digital commerce sites, including websites, mobile applications, in-store solutions and other digital storefronts. The Company’s digital commerce platform, Demandware Commerce, enables customers to establish and execute complex digital commerce strategies that include global expansion, multi-brand rollouts and omni-channel operations. The Company’s customers use its highly scalable and integrated Demandware Commerce platform to create a seamless brand experience for consumers across all digital touch points worldwide.
	The Company sells subscriptions to its on-demand software and related services through a direct sales force and indirect channels. The Company’s customers consist of retailers and branded manufacturers that operate principally in the following vertical markets: apparel and footwear, health and beauty, home and garden, sporting goods, general merchandise and other.
	The Company’s headquarters are located in Burlington, Massachusetts. At December 31, 2013 the Company had seven subsidiaries: Demandware Securities Corporation, Demandware GmbH, Demandware UK Limited, Demandware SARL and Demandware Hong Kong Limited, each of which is wholly owned by the Company, and Demandware E-Commerce (Shanghai) Limited and Demandware Australia Pty Limited, each of which is a wholly owned subsidiary of Demandware Hong Kong Limited.
	Public Stock Offering—In March 2012, the Company closed its initial public offering (“IPO”) of 6,325,000 shares of common stock, including 825,000 shares sold pursuant to the underwriters’ option to purchase additional shares, at an offering price of $16.00 per share. The Company’s common stock trades on the New York Stock Exchange under the symbol “DWRE”. The Company received proceeds from the IPO of $94.1 million, net of underwriting discounts and commissions, but before offering expenses of $3.3 million.
	In November 2013, the Company closed a follow-on offering of the sale of 3,310,098 shares of its common stock, including 810,098 shares of its common stock owned by certain shareholders, at an offering price of $57.00 per share. In December 2013, the Company sold an additional 496,515 shares of its common stock pursuant to the underwriters’ option to purchase additional shares, at a price of $57.00 per share. The Company received proceeds from the public offering of $163.1 million net of underwriting discounts and commissions, but before offering expenses of $0.5 million. The Company received no proceeds from the sale of its common stock by the selling shareholders.

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 and Consolidation—The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions have been eliminated in consolidation.
	Use of Estimates—The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue, cost of revenue, and expenses during the reporting period. Actual results could differ from those estimates.
	On an on-going basis, management evaluates its estimates, including those related to: (1) the realization of tax assets and estimates of tax liabilities, (2) fair values of investments in marketable securities, (3) the recognition and disclosure of contingent liabilities, (4) the collectability of accounts receivable, (5) the evaluation of revenue recognition criteria, including the determination of standalone value and customer life and (6) assumptions used in the Black-Scholes option pricing model to determine the fair value of stock options, including the fair value of the common stock. These estimates are based on historical data and experience, as well as various other factors that management believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources.
	Foreign Currency Translation—The functional currency of the Company’s foreign subsidiaries is the local currency. All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. Revenue and expenses are translated at the average exchange rate during the period. Translation gains or losses are included as a component of accumulated other comprehensive income (loss) in stockholders’ equity (deficit). Transaction gains or losses that arise from exchange rate fluctuations on transactions denominated in a currency other than the functional currency are included in other income (expenses) in the accompanying consolidated results of operations as incurred. For the years ended December 31, 2013, 2012 and 2011, foreign currency transaction gains (losses) of $0.6 million, $0.1 million, and ($0.1) million, respectively, are included in other expenses in the accompanying consolidated statements of comprehensive loss.
	Cash Equivalents and Short-Term Investments—The Company considers all highly liquid investments maturing within 90 days from the date of purchase to be the equivalent of cash for the purpose of balance sheet and statement of cash flows presentation. As of December 31, 2013, $226.1 million of the Company’s cash equivalents were invested in money market funds, and $3.0 million in marketable debt securities.
	Short-term investments in marketable securities are classified as available-for-sale and mature within 12 months from the date of purchase. The Company’s investments in marketable securities are recorded at fair value, with any unrealized gains and losses, net of taxes, reported as a component of stockholders’ equity until realized or until a determination is made that an other-than-temporary decline in market value has occurred. When the Company determines that an other-than-temporary decline has occurred for debt securities that the Company does not then intend to sell, the Company recognizes the credit loss component of an other-than-temporary impairment in other income (expense) and the remaining portion in other comprehensive loss. The credit loss component is identified as the amount of the present value of cash flows not expected to be received over the remaining term of the security, based on cash flow projections. In determining whether an other-than-temporary impairment exists, the Company considers: (i) the length of time and the extent to which the fair value has been less than cost; (ii) the financial condition and near-term prospects of the issuer of the securities; and (iii) the Company’s intent and ability to retain the security for a period of time sufficient to allow for any anticipated recovery in fair value. The cost of marketable securities sold is determined based on the specific identification method and any realized gains or losses on the sale of investments are reflected as a component of interest income or expense. As of December 31, 2013, all of the Company’s short-term investments were marketable debt securities.
	Restricted Cash—Included in long-term other assets at both December 31, 2013 and 2012 is restricted cash of $0.8 million for three irrevocable standby letters of credit in relation to three of the Company’s office lease agreements. Each letter of credit names the lessor as the beneficiary, and is required to fulfill lease requirements in the event the Company should default on office lease obligations.
	Accounts Receivable—Accounts receivable represent trade receivables from customers when the Company has invoiced for software subscriptions and/or services and it has not yet received payment. The Company maintains an allowance for doubtful accounts for the estimated probable losses on uncollectible accounts receivable, and presents accounts receivable net of this allowance. The allowance is based upon a number of factors including the credit worthiness of customers, the Company’s historical experience with customers, the age of the receivable and current market and economic conditions. Such factors are reviewed and updated by the Company on a quarterly basis. Past due balances over 90 days and specified other balances are reviewed individually for collectability, and all other balances are reviewed on an aggregate basis. Account balances are written off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote.
	Activity within the allowance for doubtful accounts is as follows, (in thousands):
		Years Ended December 31,
		2013			2012		2011
	Balance at beginning of year	$	—		$	—	$	—
	Charges		497			—		—
	Write-offs		(38	)		—		—
	Balance at end of year	$	459		$	—	$	—
	Concentrations of Credit Risk and Significant Customers—Financial instruments that potentially expose the Company to concentrations of credit risk include cash, cash equivalents, restricted cash, marketable securities, and accounts receivable. The Company maintains substantially all of its cash, cash equivalents, and restricted cash with one financial institution, which management believes has a high credit standing. To manage credit risk related to accounts receivable, the Company evaluates the allowances for potential credit losses. To date, losses resulting from uncollected receivables have not exceeded management’s expectations.
	As of December 31, 2013, the Company had one distributor reseller representing 12% of accounts receivable. As of December 31, 2012, the Company had one distributor reseller representing 15% of accounts receivable. During the years ended December 31, 2013 and 2012, no single customer comprised more than 10% of the Company’s revenue. During the year ended December 31, 2011, one customer represented 16% of total revenue.
	Property and Equipment—Property and equipment are recorded at cost and depreciated using the straight-line method over the estimated useful lives of the related assets, which ranges from three to five years. Leasehold improvements are amortized over the lesser of the term of the lease or the useful life of the asset. When assets are retired or disposed of, the assets and related accumulated depreciation are eliminated from the accounts and any resulting gain or loss is included in the determination of net income or loss. Maintenance and repair expenditures are charged to expense as incurred.
	Research and Development and Internal Use Software—Research and development expenses consist primarily of personnel and related expenses for the Company’s research and development staff, including salaries, benefits, bonuses and stock-based compensation; the cost of certain third-party contractor costs; and allocated overhead. Expenditures for research and development, other than internal use software costs, are expensed as incurred.
	Software development costs associated with internal use software are capitalized when the preliminary project stage is completed, management has decided to make the project a part of its future offering, and the software will be used to perform the function intended. These capitalized costs include external direct costs of services consumed in developing or obtaining internal-use software, personnel and related expenses for employees who are directly associated with and who devote time to internal-use software projects. Capitalization of these costs cease once the project is substantially complete and the software is ready for its intended purpose. Post-configuration training and maintenance costs are expensed as incurred. Capitalized internal use software costs are amortized to cost of revenue using a straight-line method over its estimated useful life of four years, commencing when the software is ready for its intended use.
	During the years ended December 31, 2013, 2012 and 2011, $0, $0.2 million and $0.4 million, respectively, of internal use software development costs were capitalized. Capitalized internal use software is included in property and equipment.
	Amortization expense related to internal use software totaled $0.2 million, $0.1 million and $0 during the years ended December 31, 2013, 2012 and 2011, respectively. The net book value of capitalized internal use software at December 31, 2013 and 2012 was $0.6 million and $0.8 million, respectively.
	Segment and Geographic Information—Operating segments are defined as components of an enterprise (business activity from which it earns revenue and incurs expenses) about which discrete financial information is available that is evaluated on a regular basis by the chief operating decision maker, or decision making group, in deciding how to allocate resources and assess performance. The Company’s chief operating decision maker (CODM) is the Chief Executive Officer. The CODM reviews consolidated operating results to make decisions about allocating resources and assessing performance for the entire Company. The CODM views the Company’s operations and manages its business as one operating segment.
	Information about the Company’s operations in different geographic regions is presented in the tables below (in thousands):
		Year Ended December 31,
		2013			2012		2011
	Revenue:
	United States	$	61,655		$	43,365	$	28,445
	Germany		16,549			20,221		19,120
	United Kingdom		13,929			9,813		5,582
	All other international		11,603			6,076		3,400
	Total revenue	$	103,736		$	79,475	$	56,547
	Long-lived assets (at year end):
	United States		8,814			7,976		6,230
	Germany		362			303		174
	United Kingdom		554			15		0
	All other international		60			83		0
	Total long-lived assets	$	9,790		$	8,377	$	6,404
	Revenue Recognition—The Company generates revenue from sales of digital commerce solutions via designated sites using the Company’s proprietary technology, which are represented by subscription and support fees and related services, which include application configuration, integration and training.
	The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery to customers has occurred or services have been rendered, the fee is fixed or determinable, and collectability is reasonably assured. The Company does not recognize revenue in excess of the amounts for which it has the right to invoice in an annual subscription year.
	Subscription revenue primarily consists of subscription fees derived from contractually committed minimum levels of gross revenue processed by customers on the Company’s cloud-based digital commerce platform, and fees derived from customers’ gross revenue processed above the minimum contracted levels. Customers do not have the contractual right to take possession of the Company’s on-demand software. Accordingly, the Company recognizes the aggregate minimum subscription fee on a straight-line basis over the subscription term, provided that an enforceable contract has been signed by both parties, access to the Company’s software has been granted to the customer, the fee for the subscription is fixed or determinable and collection is reasonably assured. Should a customer exceed the specified minimum levels of gross revenue processed, fees for customer gross revenue processed in excess of the committed minimum level are billed for the excess volume. The Company recognizes revenue from the fees it receives for its customers’ gross revenue processed in excess of the committed minimum level in the period in which such gross revenue is processed and earned. The Company also derives revenue from setup fees. The setup fees are recorded as deferred revenue and recognized as revenue ratably over the longer of the subscription agreement or the estimated expected life of the customer relationship, as discussed below.
	Service arrangements entered into prior to the customer’s initial use of the Company’s cloud-based digital commerce solutions include implementation services such as integration, application configuration and training. Such services can be performed by the Company, third-party service providers, distributors or customers themselves without the Company’s involvement. However, because such services are generally delivered prior to the customer being able to use the Company’s platform, the Company has concluded that such fees do not have stand-alone value, and the Company recognizes them on a straight-line basis over the longer of the life of the subscription agreement or the estimated expected life of the customer relationship. As the Company gains more experience with customer renewals, the Company continues to evaluate the estimated life of their customers. At December 31, 2012, the Company reassessed the estimated expected life of their customers, increasing it to just over six years. This change in accounting estimate affected the amortization of setup fees and service implementation revenue, decreasing subscription and services revenue by $0.3 million and $1.5 million, respectively, for the year ended December 31, 2013. As a result of the change in estimated expected customer life, the Company’s loss from operations, net loss and net loss per share increased by $1.8 million, $1.8 million and $0.06, respectively, for the year ended December 31, 2013. The Company determined this change in accounting estimate was appropriate due to the increased amount of renewal history available, which provided better insight and improved judgment in determining the estimate. At December 31, 2013, the Company confirmed the estimated expected life of their customers remains just over six years. The Company will continue to evaluate the length of the amortization period and it is possible that, in the future, the estimated expected customer life may change and, if so, the period of amortization will be adjusted.
	Service arrangements entered into subsequent to the customer’s initial use of the Company’s cloud-based digital commerce solutions include assistance with additional instances of the integration, application configuration and training. Such services can be performed by the Company, third-party service providers, distributors or customers themselves without the Company’s involvement and are not necessary for the customer to access and use the Company’s cloud-based digital commerce solutions, and as a result, the Company has concluded that such fees have stand-alone value. The Company has determined that the digital commerce solution has standalone value, because, once a customer launches its initial site, the solution is fully functional and does not require any additional development, modification or customization.
	The Company is not able to determine VSOE or TPE for its deliverables because management has determined that there are no third-party offerings reasonably comparable to the Company’s solution. Accordingly, the selling prices of subscriptions to the solution and services are based on ESP. The determination of ESP requires the Company to make significant estimates and judgments. The Company considers numerous factors, including the size and nature of the deliverables themselves; the geography, market conditions and competitive landscape for the sale; internal costs; and pricing and discounting practices. The determination of ESP is made through consultation with and formal approval by senior management. The Company updates its estimates of ESP on an ongoing basis as events and as circumstances may require.
	After the selling price of revenue allocable to each deliverable in a multiple deliverable arrangement based on the relative selling price method is determined, revenue is recognized for each deliverable based on the type of deliverable. For subscriptions to the Company’s digital commerce platform, revenue is recognized on a straight-line basis over the subscription term, which is typically three years. For services entered into subsequent to the customer’s initial implementation of the Company’s digital commerce solutions, revenue is recognized using the proportional performance method over the period the services are performed.
	Reimbursable costs received for out-of-pocket expenses are recorded as revenue and cost of revenue in the consolidated statements of operations. Sales taxes collected from customers and remitted to government authorities are excluded from revenue.
	Deferred revenue represents amounts billed to customers for which revenue has not been recognized. Deferred revenue consists of the unearned portion of services fees or the unearned portion of fees from subscriptions to the Company’s cloud-based digital commerce solutions.
	Cost of Revenue—Cost of subscription revenue primarily consists of hosting costs, data communications expenses, depreciation expenses associated with computer equipment, personnel and related costs, including salaries, bonuses, payroll taxes, recruiting fees and stock compensation, software license fees and amortization expenses associated with capitalized software. In addition, the Company allocates a portion of overhead, such as rent, IT costs, depreciation and amortization and employee benefits costs, to cost of revenue based on headcount.
	Cost of services revenue primarily consists of personnel and related costs, third-party contractors and allocated overhead. The Company’s cost of services revenue is expensed as the costs are incurred.
	Impairment of Long-Lived Assets—The Company considers whether indicators of impairment of its long-lived assets are present. If such indicators are present, the Company determines whether the sum of the estimated undiscounted future cash flows attributable to such assets is less than their carrying amount, and if so, the Company recognizes an impairment loss based on the excess of the carrying amount of the assets over their fair value. To date, no such impairment has occurred.
	Advertising—Advertising costs are charged to operations as incurred and include direct marketing, events, public relations, sales collateral materials and partner programs. Advertising expense was approximately $6.2 million, $4.0 million and $2.0 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	Income Taxes—Deferred tax assets and liabilities are recognized based on temporary differences between the financial reporting and income tax bases of assets and liabilities using rates anticipated to be in effect when such temporary differences reverse. A valuation allowance against deferred tax assets is recorded, based upon the available evidence, if it is more likely than not that some or all of the deferred tax assets will not be realized. The Company assesses its income tax positions and records tax benefits based upon management’s evaluation of the facts, circumstances, and information available at the reporting date. For those tax positions where it is more likely than not that a tax benefit will be sustained, the Company records the largest amount of tax benefit with a greater than 50 percent likelihood of being realized upon ultimate settlement with a taxing authority having full knowledge of all relevant information. For those income tax positions where it is not more likely than not that a tax benefit will be sustained, no tax benefit is recognized in the financial statements. The unrecognized tax benefits are currently presented as a reduction to the deferred tax assets in the financial statements, unless the uncertainty is expected to be resolved within one year. Potential interest and penalties associated with such uncertain tax positions are recorded as a component of income tax expense.
	Stock-Based Compensation—The Company accounts for all stock options granted to employees and nonemployees using a fair value method. The Black-Scholes option pricing model is used to determine the fair value of the award, which is then recognized on a straight-line basis over the requisite services period, which is the vesting period of the award. The measurement date for employee awards is the date of the grant, and the measurement date for nonemployee awards is the date the performance or services are completed.
	Other Comprehensive (Loss) Income—Other comprehensive (loss) income consists of net loss, foreign currency translation adjustments, and unrealized gains or losses on marketable securities.
	Warranties—The Company includes service level commitments to its customers warranting certain levels of uptime reliability and performance and permitting those customers to receive credits in the event that the Company fails to meet those levels. To date, the Company has not incurred any material costs as a result of such commitments.
	Commissions—The Company recognizes commission expense related to subscriptions in the period in which the contract is signed.
	Recent Accounting Pronouncements—On July 18, 2013, the Financial Accounting Standards Board issued Accounting Standards Update No. 2013-11, “Presentation of a Liability for an Unrecognized Tax Benefit When a Net Operating Loss or Tax Credit Carryforward Exists.” This accounting update requires that an unrecognized tax benefit be presented as a reduction of a deferred tax asset for a net operating loss (“NOL”) carryforward or other tax credit carryforward when settlement in this manner is available under applicable tax law. This guidance is effective for the Company’s interim and annual periods beginning January 1, 2014. The Company does not believe the adoption of this guidance will have a material impact on the Company’s consolidated financial position, results of operations or cash flows.

Net_Loss_Per_Share_Attributabl

Net Loss Per Share Attributable to Common Stockholders	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Net Loss Per Share Attributable to Common Stockholders	'
	3. NET LOSS PER SHARE ATTRIBUTABLE TO COMMON SHAREHOLDERS
	The Company calculates basic and diluted net loss per common share by dividing the net loss adjusted for the dividend on the redeemable convertible preferred stock by the weighted average number of common shares outstanding during the period. The Company has excluded all potentially dilutive shares, which include outstanding common stock options, unvested restricted stock, redeemable convertible preferred stock, the warrant for redeemable convertible preferred stock, and shares under the Company’s Employee Stock Purchase Plan, from the weighted average number of common shares outstanding as their inclusion in the computation for all periods would be anti-dilutive due to net losses. The Company’s previously outstanding redeemable convertible preferred stock are participating securities as defined under the authoritative guidance, but are excluded from the earnings per share calculation as they do not have an obligation to share or fund in the Company’s net losses. The Company’s unvested restricted stock awards are not considered participating securities under the authoritative guidance since any dividends earned on unvested restricted shares are required to be returned if unvested shares are forfeited.
	The following common stock equivalents were excluded from the computation of diluted net loss per share attributable to common stockholders because they had an antidilutive impact (in thousands):
		Year Ended December 31,
		2013		2012		2011
	Options to purchase common stock		3,652		4,421		4,492
	Nonvested restricted stock		880		341		—
	Employee Stock Purchase Plan		7		—		—
	Warrant		—		—		23
	Redeemable convertible preferred stock		—		—		18,028

Cash_Equivalents_and_ShortTerm

Cash Equivalents and Short-Term Investments	12 Months Ended
	Dec. 31, 2013
Cash And Cash Equivalents [Abstract]	'
Cash Equivalents and Short-Term Investments	'
	4. CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS
	A summary of the Company’s cash equivalents and short-term investments at December 31, 2013 is as follows (in thousands):
		Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
	Cash Equivalents:
	Money market funds	$	226,130	$	—	$	—		$	226,130
	Certificates of deposit		998		—		—			998
	Municipal securities		2,000		—		—			2,000
		$	229,128	$	—	$	—		$	229,128
	Short-Term Investments:
	U.S. government agency bonds	$	4,500	$	1	$	—		$	4,501
	Corporate bonds and commercial paper		3,318		—		(1	)		3,317
	Municipal securities		19,701		4		(2	)		19,703
	Certificates of deposit		9,612		1		(1	)		9,612
		$	37,131	$	6	$	(4	)	$	37,133
	A summary of the Company’s cash equivalents and short-term investments at December 31, 2012 is as follows (in thousands):
		Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
	Cash Equivalents:
	Money market funds	$	48,089	$	—	$	—		$	48,089
	Certificates of deposit		1,933		—		—			1,933
	Municipal securities		2,070		—		—			2,070
		$	52,092	$	—	$	—		$	52,092
	Short-Term Investments:
	U.S. government agency bonds	$	16,714	$	5	$	—		$	16,719
	Corporate bonds and commercial paper		15,397		2		(1	)		15,398
	Municipal securities		7,412		7		—			7,419
	Certificates of deposit		8,714		1		—			8,715
		$	48,237	$	15	$	(1	)	$	48,251
	The contractual maturity dates for the Company’s available-for-sale investments that are classified as short-term investments in the consolidated balance sheets are one year or less from the respective balance sheet dates.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	5. FAIR VALUE MEASUREMENTS
	Financial instruments, including cash equivalents, restricted cash, accounts receivable, accounts payable, and accrued expenses are carried in the consolidated financial statements at amounts that approximate fair value at December 31, 2013 and 2012. Fair values are based on market prices and assumptions concerning the amount and timing of estimated future cash flows and assumed discount rates, reflecting varying degrees of perceived risk. Management believes that the Company’s debt obligations bear interest at rates which approximate prevailing market rates for instruments with similar characteristics and, accordingly, the carrying values for these instruments approximate fair value.
	Accounting principles generally accepted in the United States define fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. Additionally, the inputs used to measure fair value are prioritized based on a three-level hierarchy. This hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows:
		•		Level 1—Quoted prices in active markets for identical assets or liabilities.
		•		Level 2—Other inputs that are observable directly or indirectly, such as quoted prices for similar assets and liabilities or market corroborated inputs.
		•		Level 3—Unobservable inputs are used when little or no market data is available, which requires the Company to develop its own assumptions about how market participants would value the assets or liabilities.
	The following table details the fair value measurements within the fair value hierarchy of the Company’s financial assets and liabilities at December 31, 2013 and 2012 (in thousands):
					Fair Value Measurements Using
			Amounts		Quoted Prices			Significant Other		Significant
			at Fair  Value		in  Active			Observable  Inputs		Unobservable
					Markets for			(Level 2)		Inputs (Level 3)
					Identical  Assets
					(Level 1)
	At December 31, 2013
	Assets—Cash Equivalents:
	Money market funds		$	226,130	$	226,130		$	—	$	—
	Certificates of deposit			998		—			998		—
	Municipal securities			2,000		—			2,000		—
	Assets—Short-Term Investments:
	U.S. government agency bonds		$	4,501	$	—		$	4,501	$	—
	Corporate bonds and commercial paper			3,317		—			3,317		—
	Municipal securities			19,703		—			19,703		—
	Certificates of deposit			9,612		—			9,612		—
	At December 31, 2012
	Assets—Cash Equivalents:
	Money market funds		$	48,089	$	48,089		$	—	$	—
	Certificates of deposit			1,933		—			1,933		—
	Municipal securities			2,070		—			2,070		—
	Assets—Short-Term Investments:
	U.S. government agency bonds		$	16,719	$	—		$	16,719	$	—
	Corporate bonds and commercial paper			15,398		—			15,398		—
	Municipal securities			7,419		—			7,419		—
	Certificates of deposit			8,715		—			8,715		—
	When developing fair value estimates, the Company maximizes the use of observable inputs and minimizes the use of unobservable inputs. When available, the Company uses quoted market prices to measure fair value. If market prices are not available, the fair value measurement is based on models that use primarily market based parameters including yield curves, volatilities, credit ratings and currency rates. In certain cases where market rate assumptions are not available, the Company is required to make judgments about assumptions market participants would use to estimate the fair value of a financial instrument.
	The valuation technique used to measure fair value for the Company’s Level 1 and Level 2 assets and liabilities is a market approach that uses prices and other relevant information generated by market transactions involving identical or comparable assets.
	The valuation technique used to measure fair value for the Company’s Level 3 assets and liabilities, which consisted of the preferred stock warrant liability, was the Black-Scholes model.
	A rollforward of the fair value measurements of the preferred stock warrant liability categorized with Level 3 inputs in the years ended December 31, 2013, 2012 and 2011 is as follows (in thousands):
			December 31,
			2013		2012			2011
	Balance beginning of year		$	—	$	107		$	58
	Change in fair value of warrant liability			—		426			49
	Reclassification of warrant liability to equity			—		(533	)		—
	Balance end of year		$	—	$	—		$	107

Property_and_Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2013
Property Plant And Equipment [Abstract]	'
Property and Equipment	'
	6. PROPERTY AND EQUIPMENT
	Property and equipment as of December 31, 2013 and 2012 consist of the following (in thousands):
		December 31,
		2013			2012
	Computer equipment	$	18,976		$	13,901
	Purchased software, including internal use software		4,134			4,135
	Leasehold improvements		893			332
	Office furniture		1,177			992
	Property and equipment—at cost		25,180			19,360
	Less accumulated depreciation and amortization		(15,390	)		(10,983	)
	Property and equipment—net	$	9,790		$	8,377
	Depreciation and amortization expense for the years ended December 31, 2013, 2012 and 2011, was $4.4 million, $3.4 million and $2.9 million, respectively.

Debt

Debt	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Debt	'
	7. DEBT
	Line of Credit—The Company’s loan and security agreement (the “2008 Loan Agreement”) provided a secured revolving credit facility of up to $5.0 million (the “Revolving Credit Facility”). Under the terms of the agreement, borrowing availability varied based upon eligible accounts receivable. Borrowings were collateralized by substantially all of the assets of the Company and bore interest at a variable rate of 0.75% above prime rate. The Revolving Credit Facility was terminated by the Company in June 2012 at the Company’s request pursuant to the terms of the 2008 Loan Agreement.
	In connection with the Company’s entry into the 2008 Loan Agreement, the Company issued a warrant to purchase 23,092 shares of its Series C Preferred Stock, which, at the closing of the IPO, automatically converted into a warrant to purchase shares of the Company’s common stock at an exercise price of $3.90 per share. The warrant was net exercised in September 2012 resulting in the issuance of 20,186 shares of common stock (see Note 9).
	Equipment Notes Payable—The Company’s loan and security agreement (the “2008 Loan Agreement”) was amended in May 2009 to include a $2.0 million equipment line of credit (the “Loan”). Borrowings under the Loan could be made for eligible equipment purchases through December 31, 2009. The Loan was again amended in April 2010, June 2011, June 2012 and June 2013, which increased the available borrowings by an additional $4.0 million, $4.0 million, $3.0 million and $3.0 million, respectively. Each advance under the Loan is payable in 36 equal monthly payments of principal plus accrued interest, at an annual rate of 3.75%. The last payment on the Loan is due June 1, 2016.
	At December 31, 2013 and 2012, the outstanding balance under the Loan was $3.3 million and $4.1 million, respectively. The carrying value of the Loan at December 31, 2013 and 2012 approximated fair value. As of December 31, 2013, the Company had $1.6 million of available borrowings under the Loan for eligible equipment purchases through April 30, 2014.
	The 2008 Loan Agreement is secured by substantially all of the Company’s assets, except its intellectual property. The 2008 Loan Agreement also contains various covenants that limit, among other things, indebtedness, investments, liens, transactions and certain mergers and sales of assets. In addition, the loan contains financial covenants that impose a minimum adjusted quick ratio, as defined in the 2008 Loan Agreement. The Company was in compliance with all such covenants at December 31, 2013.
	As of December 31, 2013, future annual principal payments due under the Loan were as follows (in thousands):
	Years Ending December 31,
	2014	$	2,030
	2015		1,029
	2016		285
			3,344
	Less current portion of notes payable		2,030
	Long-term notes payable	$	1,314
	Software Financing—In May 2012, the Company entered into a $1.8 million agreement to finance the purchase of a perpetual software license and the related first year technical support (the “Software Finance Agreement”). The Software Finance Agreement is secured by the financed assets. The financed amount is due in 12 equal quarterly payments of principal, plus accrued interest, at an annual rate of 5.40% through April 1, 2015. In May 2013, the Company renewed the related technical support for a second year, increasing the financed amount by $0.6 million. As of December 31, 2013 and 2012, the outstanding balance under the Software Finance Agreement was $0.9 million and $1.3 million, respectively.
	As of December 31, 2013, future annual principal payments due under the Software Finance Agreement were as follows (in thousands):
	Years Ending December 31,
	2014	$	697
	2015		210
			907
	Less current portion of note payable		697
	Long-term notes payable	$	210

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	8. COMMITMENTS AND CONTINGENCIES
	Operating Leases—The Company also has several operating leases for its office space that expire on various dates through 2021. The Company leases office space in the United Kingdom, Germany and France, in addition to the office space leased in the United States for its corporate headquarters in Burlington, Massachusetts. Minimum rent payments under operating leases are recognized on a straight-line basis over the term of the lease including any periods of free rent and rent concessions. During the years ended December 31, 2013, 2012 and 2011, rent expense was $2.6 million, $2.1 million, and $1.0 million, respectively.
	The Company’s obligation for payments under these leases is as follows at December 31, 2013 (in thousands):
	Years Ending December 31
	2014	$	2,649
	2015		2,621
	2016		2,375
	2017		1,900
	2018		1,230
	Thereafter		918
	Total minimum lease payments	$	11,693
	Co-location Services—The Company has agreements with third parties to provide co-location services for hosting operations, which typically have a term of 24 months. The agreements require payment of a minimum amount per month for a fixed period of time in return for which the co-location service provider provides certain guarantees of network availability. All agreements expire by January 2016.
	The Company recorded co-location service expenses of $3.2 million, $2.5 million, and $1.5 million during the years ended December 31, 2013, 2012, and 2011, respectively. Future minimum payments as of December 31, 2013 under these arrangements are $4.0 million in 2014, $2.8 million in 2015 and $11,000 in 2016.
	Chinese Investment—In connection with establishing operations in China, in December 2011, the Company entered into a funding agreement pursuant to which it lent $150,000 to the owners of a Chinese limited liability company (the “Chinese Entity”) in exchange for a customer-supplier relationship with the Chinese Entity and an option to purchase such entity. An additional $16,000 was funded in February 2012, and is included in the change in restricted cash and other assets line item of the Company’s Consolidated Statement of Cash Flows. As of December 31, 2013, this entity had not commenced operations.
	Patent Infringement—The Company has received both direct claims from non-practicing entities claiming infringement of patents owned by them and indemnification requests from customers that have received letters from or been sued by such entities. Many of those underlying claims have not yet been resolved, and the extent, if any, of the Company’s indemnification obligations has not been determined. Certain of these matters include speculative claims for substantial or indeterminate amounts of damages. In addition, some of the patents at issue are the subject of pending legal proceedings between the patent owners and one or more leading digital commerce companies, and the outcome of those proceedings could affect the extent to which the patent owners seek to prosecute claims against the Company or its customers. The Company’s business could be materially adversely affected by any significant disputes between the Company and its customers as to intellectual property litigation to which the Company might become a party or for which the Company may be required to provide indemnification. Adverse results in these matters may include awards of substantial monetary damages, costly licensing agreements, or orders preventing the Company from offering certain features, functionalities, products, or services, and may also cause the Company to change its business practices, and require development of non-infringing products or technologies, which could result in a loss of revenues and otherwise harm the Company’s business. As of December 31, 2013, the Company has not made an accrual related to these matters.
	The Company records a liability when it believes that a loss is both probable and reasonably estimable. On a quarterly basis, the Company reviews each of its legal proceedings to determine whether it is probable, reasonably possible or remote that a liability has been incurred and, if it is at least reasonably possible, whether a range of loss can be reasonably estimated. Significant judgment is required to determine both the likelihood of there being a loss and the estimated amount of such loss. Until the final resolution of such matters, there may be an exposure to loss in excess of the amount recorded, and such amounts could be material. The Company expenses legal fees in the period in which they are incurred.
	In all of the Company’s outstanding legal matters for which it has not made an accrual, the Company is unable to estimate a range of reasonably possible loss due to various factors, including, among others, the early stage and uncertain outcome of the pending lawsuits to which the Company is not a party; and the significant factual issues to be resolved regarding the extent, if any, of the Company’s indemnification obligations. Given the significant uncertainties involved in these matters, the Company cannot predict the timing or extent of their impact, if any, on its business, consolidated financial position, results of operations or cash flows, which could be material, particularly in any fiscal quarter in which it may accrue a related liability.

Capitalization

Capitalization	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Capitalization	'
	9. CAPITALIZATION
	As of December 31, 2013, the Company’s authorized stock consists of 240,000,000 shares of common stock, par value of $0.01 per share, and 10,000,000 shares of preferred stock, par value of $0.01 per share. No shares of preferred stock are issued or outstanding at December 31, 2013.
	On March 20, 2012, upon the closing of the IPO, all outstanding shares of redeemable convertible preferred stock were automatically converted into 18,028,763 shares of common stock.

Warrants

Warrants	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Warrants	'
	10. WARRANTS
	In July 2008, in connection with the Company’s entry into the 2008 Loan Agreement (see Note 7), the Company issued a warrant to purchase shares of its Series C Preferred Stock, which, at the closing of the IPO, automatically converted into a warrant to purchase 23,092 shares of the Company’s common stock at an exercise price of $3.90 per share. The warrant was exercisable at any time through its expiration in July 2018. So long as the warrant remained outstanding and exercisable for redeemable convertible preferred stock, the warrant liability was recorded at fair value at each balance sheet date with any change in fair value included as a component of other (expense) income. For the years ended December 31, 2013, 2012 and 2011, the Company recognized $0, ($0.4) million, and ($49,000) of loss, respectively, for the change in the fair value of the warrant. At the time of conversion of the warrant upon the closing of the IPO, the fair value of the warrant was $0.5 million, which was reclassified as a component of additional paid-in capital. The warrant was net exercised in September 2012 resulting in the issuance of 20,186 shares of common stock.
	The following table includes the fair value of the warrant liability using the Black-Scholes option pricing model and the underlying assumptions used in the model (dollars in thousands):
		March 20, 2012			As of
		(Close of			December  31,
		IPO)			2011
	Fair value of preferred stock warrant liability	$	533		$	107
	Risk-free interest rate		1.56	%		1.45	%
	Expected dividend yield		—			—
	Expected term (in years)		6.25			6.5
	Expected volatility		57.4	%		59.1	%

StockBased_Compensation_Plans

Stock-Based Compensation Plans	12 Months Ended
	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Stock-Based Compensation Plans	'
	11. STOCK-BASED COMPENSATION PLANS
	As of December 31, 2013, the Company had two stock-based compensation plans, the 2004 Stock Option and Grant Plan (the “2004 Plan”), and the 2012 Stock Incentive Plan (the “2012 Plan”). The 2012 Plan became effective upon the closing of the IPO. The 2012 Plan provides for the grant of incentive stock options to the Company’s employees and the grant of non-statutory stock options, restricted stock, restricted stock units, stock appreciation rights, performance units and performance shares to the Company’s employees, directors and consultants. Upon the effectiveness of the 2012 Plan, the Company ceased granting awards under the 2004 Plan. However, the 2004 Plan will continue to govern the terms and conditions of the outstanding awards previously granted thereunder.
	Under the 2012 Plan, the Company may issue up to 6,749,678 shares of common stock pursuant to stock options and stock awards, which include (i) shares of common stock reserved for issuance under the 2004 Plan that remained available for issuance immediately prior to the closing of the IPO and (ii) shares of common stock subject to awards granted under the 2004 Plan that expire, terminate or are otherwise surrendered, cancelled, forfeited or repurchased by the Company at their original issuance price pursuant to a contractual repurchase right. As of December 31, 2013, the Company has authorized 240,000,000 shares of common stock and the following number of shares of common stock has been reserved for the exercise of stock options and the release of restricted stock (in thousands):
		As of
		December  31,
		2013
	2004 Stock Option and Grant Plan		1,952
	2012 Stock Incentive Plan		6,304
	Total		8,256
	Stock Options—Under the 2012 Plan, stock options may be granted at an exercise price not less than the fair market value of the Company’s common stock on the date of grant. Substantially all stock options and restricted stock awards currently outstanding under both plans vest over a period of four years.
	The summary of stock option activity for the year ended December 31, 2013 is as follows (in thousands, except per share and term information):
		Shares			Weighted-			Weighted-			Aggregate
					Average			Average			Intrinsic
					Exercise			Remaining			Value
					Price			Contractual
								Life (in
								Years)
	Outstanding—January 1, 2013		4,127		$	9.45			7.57		$	77,557
	Granted		290			33.47
	Forfeited		172			21.1
	Expired or cancelled		4			16.63
	Exercised		1,247			6.37
	Outstanding—December 31, 2013		2,994		$	12.39			6.96		$	154,928
	Exercisable—December 31, 2013		2,054		$	5.81			6.34		$	119,747
	Options vested and expected to vest—December 31, 2013		2,929		$	11.92			6.92		$	152,891
	Restricted Stock Awards—The Company’s restricted stock awards generally vest over a two- or four-year period and upon vesting, the restrictions on the shares are released. In December 2013, the Company granted a 25,000 share performance-based restricted stock award, and the restriction on the shares will be released when the recipient achieves operational metrics as defined in the agreement.
	The summary of restricted stock activity is as follows (in thousands, except per share and term information):
		Number of			Weighted-
		Shares			Average
					Grant Date
					Fair Value
	Nonvested at December 31, 2012		431		$	30.86
	Granted		752			33.02
	Vested		167			31.64
	Forfeited		55			29.1
	Nonvested at December 31, 2013		961		$	32.51
	The following table summarizes information relating to stock-based awards granted and exercised (in thousands, except per share data):
		Year Ended December 31,
		2013			2012			2011
	Weighted average fair value of options granted	$	16.87		$	16.49		$	3.3
	Aggregate intrinsic value of options exercised		42,099			21,402			5,990
	Cash proceeds received upon exercise of options		7,948			1,282			1,645
	The aggregate intrinsic value represents the difference between the estimated fair value at exercise and the exercise price paid by the employee. The amount of aggregate intrinsic value will change based on the fair market value of the common stock.
	Employee Stock Purchase Plan—The Employee Stock Purchase Plan (“ESPP”) and its foreign corollaries permit eligible employees to purchase up to a maximum of 400,000 shares of our common stock through accumulated payroll deductions. Each offering is a six month period (a “Plan Period”), and the purchase price of the stock is equal to 85% of the lesser of the market value of such shares at the first or last business day of a Plan Period. On December 31, 2013, the Company issued 14,934 shares under the ESPP at a $36.47 exercise price for cash proceeds of $0.5 million.
	Stock-Based Compensation—Stock-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized as an expense over the service period, which is generally the vesting period of the equity grant. For the award with a performance-based measure, the Company accrues stock-based compensation cost if it is probable that the performance condition will be achieved. The Company estimates forfeitures at the time of grant and revises the estimates, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The following table presents stock-based compensation expense included in the Company’s consolidated statements of comprehensive loss (in thousands):
		Year Ended December 31,
		2013			2012			2011
	Cost of subscription revenue	$	391		$	175		$	20
	Cost of service revenue		1,179			722			93
	Sales and marketing		4,296			1,842			252
	Research and development		3,574			1,509			487
	General and administrative		5,248			2,795			637
		$	14,688		$	7,043		$	1,489
	Stock-based compensation cost for the year ended December 31, 2013 and 2012 includes $8.0 million and $2.8 million, respectively, related to restricted stock awards, which are being charged to income based upon their fair values over their vesting period. During the year ended December 31, 2011, $0.4 million of the Company’s stock-based compensation cost related to a restricted stock award issued for a promissory note that was repayable in full on demand. Since the measurement date for the purchase of the shares of common stock was not fixed until the note was repaid, the arrangement was subject to variable accounting and required incremental stock-based compensation to be recorded if the fair value of the underlying common stock changed.
	As of December 31, 2013, total compensation cost not yet recognized related to stock option awards was $11.9 million, which is expected to be recognized over a weighted-average period of 2.5 years, and total compensation cost not yet recognized related to restricted stock awards was $26.7 million, which is expected to be recognized over a weighted-average period of 2.9 years.
	The Company uses the Black-Scholes option-pricing model to estimate the fair value of stock options awards and determine the related compensation expense. The assumptions used to compute stock-based compensation expense for awards granted are as follows:
		Year Ended December 31,
		2013			2012			2011
	Risk-free interest rate		2.1	%		1.3	%		2.1	%
	Expected dividend yield		—			—			—
	Expected term (in years)		6			6			6
	Weighted average expected volatility		50.42	%		57	%		59.9	%
	The risk-free interest rate assumption was based on the U.S. Treasury zero-coupon bonds with maturities similar to those of the expected term of the award being valued. The assumed dividend yield was based on the Company’s expectation of not paying dividends in the foreseeable future. The weighted-average expected life for employee options reflects the application of the simplified method, which represents the average of the contractual term of the options and the weighted-average vesting period for all option tranches. The simplified method has been used since the Company does not have sufficient historical exercise data to provide a reasonable basis upon which to estimate expected term due to a limited period of the Company’s life. The expected life of options granted to nonemployees is equal to the remaining contractual term as of the measurement date. The Company bases the majority of its estimate of expected volatility using volatility data from comparable public companies in similar industries and markets because there is currently limited public market history for the Company’s common stock, and therefore, a lack of market-based company-specific historical and implied volatility information.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	12. INCOME TAXES
	The provision for income taxes for the years ended December 31, 2013, 2012 and 2011 consists of the following (in thousands):
		December 31,
		2013			2012			2011
	Loss before income taxes:
	Domestic	$	(21,940	)	$	(8,832	)	$	(1,627	)
	International		1,634			1,129			428
		$	(20,306	)	$	(7,703	)	$	(1,199	)
		December 31,
		2013			2012			2011
	Current income tax provision:
	Federal	$	—		$	—		$	—
	State		52			56			55
	Foreign		457			368			157
	Total current income tax provision		509			424			212
	Deferred income tax provision:
	Federal		—			—			—
	State		—			—			—
	Foreign		65			(3	)		—
	Total deferred income tax provision		65			(3	)		—
	Total income tax provision	$	574		$	421		$	212
	The differences in total provision for income taxes that would result from applying the 34% federal statutory rate to (loss) income before provision for income taxes and the reported provision for income taxes are as follows:
		Years Ended December 31,
		2013			2012			2011
	U.S. Federal tax expense at statutory rates		34	%		34	%		34	%
	State income taxes, net of federal tax benefit		1	%		1	%		(14	)%
	Foreign rate differential		0	%		1	%		1	%
	Permanent differences		(2	)%		(2	)%		(6	)%
	Stock-based compensation		(5	)%		(5	)%		(15	)%
	Uncertain tax provisions		(1	)%		(1	)%		(9	)%
	Valuation allowance		(30	)%		(33	)%		(9	)%
			(3	)%		(5	)%		(18	)%
	Components of the net deferred tax assets as of December 31, 2013 and 2012 are as follows (in thousands):
		December 31,
		2013			2012
	Operating loss carryforwards	$	12,948		$	16,747
	Capitalized research and development costs		8,433			2,634
	Accrued expenses		5,630			2,897
	Research and development credits		1,160			890
	Deferred revenue		4,192			4,164
	Stock compensation		2,850			1,685
	Depreciation		296			301
	Other		3			—
	Total deferred tax assets		35,512			29,318
	Valuation allowance for deferred tax assets		(35,577	)		(29,315	)
	Net deferred tax assets	$	(65	)	$	3
	The Company has historically incurred operating losses and given the cumulative losses and limited history of profits, the Company has recorded a full valuation allowance against its deferred tax assets for all periods to date with the exception for the deferred tax asset related to Demandware E-Commerce (Shanghai) Limited, Demandware UK Limited, and Demandware Australia Pty Limited.
	In general, it is the practice and intention of the Company to reinvest the earnings of its non-U.S. subsidiaries in those operations. As of December 31, 2013, the Company has not made a provision for U.S. or additional foreign withholding taxes of the excess of the amount for financial reporting over the tax basis of investments in foreign subsidiaries that are essentially permanent in duration. Generally, such amounts become subject to U.S. taxation upon the remittance of dividends and under certain other circumstances. It is not practicable to estimate the amount of deferred tax liability related to investments in these foreign subsidiaries.
	During the year ended December 31, 2012, the valuation allowance increased by $2.7 million due to the increase in deferred tax asset associated with the net operating loss and the full valuation allowance against that asset. During the year ended December 31, 2013, the valuation allowance increased by $6.3 million due to the increase in deferred tax asset associated with the research and development costs and accrued expenses and the full valuation allowance against that asset.
	At December 31, 2013, the Company had federal and state net operating loss carryforwards of approximately $93.8 million and $51.3 million, respectively. At December 31, 2013, the Company also had federal and state research and development tax credit carryforwards of $0.9 million and $0.6 million, respectively. The net operating loss carryforwards and tax credits expire at various dates through 2033. Because of the change of ownership provisions of the Tax Reform Act of 1986, use of a portion of our domestic NOL and tax credit carryforwards may be limited in future periods. Further, a portion of the carryforwards may expire before being applied to reduce future income tax liabilities.
	As a result of certain realization requirements of share-based payment accounting guidance, the table of deferred tax assets and liabilities shown above does not include certain deferred tax assets as of December 31, 2013 and 2012 that arose directly from tax deductions related to equity compensation in excess of compensation recognized for financial reporting. Equity will be increased by $22 million if and when such deferred tax assets are ultimately realized. The Company uses ASC 740 ordering when determining when excess tax benefits have been realized.
	The following table indicates the changes to the Company’s unrecognized tax benefits for the years ended December 31 (in thousands):
		2013			2012			2011
	Beginning balance	$	1,061		$	805		$	670
	Increase related to current tax year		357			256			135
	Ending balance	$	1,418		$	1,061		$	805
	The liability for unrecognized tax benefits includes no accrued interest and penalties. The Company expects none of the unrecognized tax benefits will decrease within the next 12 months related to expired statutes or settlement with the taxing authorities. Under the Company’s accounting policies, the unrecognized tax benefits disclosed above are presented in the financial statements as a reduction to a deferred tax asset.
	The Company files federal, state, and foreign income tax returns in jurisdictions with varying statutes of limitations. With few exceptions, all tax years 2004 through 2013 remain subject to examination by federal and most state tax authorities due to the Company’s net operating loss carryforwards. In the Company’s foreign jurisdictions, all tax years remain subject to examination.

Employee_Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2013
Postemployment Benefits [Abstract]	'
Employee Benefits	'
	13. EMPLOYEE BENEFITS
	The Company has a 401(k) defined contribution plan (the “401(k) Plan”) for employees. The 401(k) Plan includes substantially all United States full-time employees. Under the terms of the plan, participants may contribute up to the lower of 20% of their salary or the statutorily prescribed limit to the plan. At the election of its Board of Directors, the Company may make matching employee contributions, though it has not done so to date.

Selected_Quarterly_Information

Selected Quarterly Information	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Selected Quarterly Information	'
	14. SELECTED QUARTERLY INFORMATION (UNAUDITED)
		2013
	(in thousands, except per share amounts)	1st			2nd			3rd			4th
		Quarter			Quarter			Quarter			Quarter
	Revenue	$	20,514		$	23,207		$	24,479		$	35,536
	Gross profit		14,032			16,665			17,428			27,594
	(Loss) income from operations		(7,317	)		(8,413	)		(6,769	)		1,710
	(Loss) income before provision for income taxes		(7,753	)		(8,310	)		(6,147	)		1,904
	Net (loss) income		(7,972	)		(8,455	)		(6,257	)		1,822
	Basic net (loss) earnings per share attributable to common stockholders	$	(0.27	)	$	(0.28	)	$	(0.20	)	$	0.06
	Diluted net (loss) earnings per share attributable to common stockholders	$	(0.27	)	$	(0.28	)	$	(0.20	)	$	0.05
		2012
	(in thousands, except per share amounts)	1st			2nd			3rd			4th
		Quarter			Quarter			Quarter			Quarter
	Revenue	$	16,090		$	18,360		$	18,706		$	26,319
	Gross profit		10,671			12,265			12,215			19,983
	(Loss) income from operations		(1,843	)		(5,083	)		(3,566	)		3,333
	(Loss) income before provision for income taxes		(2,117	)		(5,563	)		(3,432	)		3,409
	Net (loss) income		(2,243	)		(5,633	)		(3,471	)		3,223
	Basic net (loss) earnings per share attributable to common stockholders	$	(0.42	)	$	(0.19	)	$	(0.12	)	$	0.11
	Diluted net (loss) earnings per share attributable to common stockholders	$	(0.42	)	$	(0.19	)	$	(0.12	)	$	0.1

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	15. SUBSEQUENT EVENTS
	Mainstreet Commerce Acquisition—On January 23, 2014, the Company acquired 100% of the equity of Mainstreet Commerce LC, a provider of cloud-based distributed order management solutions, for total cash consideration of $19.4 million. $10.0 million of the total consideration will be held in escrow and released ratably in quarterly payments through January 2016. Since $7.0 million of the total amount in escrow includes contingent earn-out payments, the purchase price allocated to the acquisition is $12.4 million. The initial accounting of the business combination is incomplete as of the issuance date of these financial statements. Therefore, the Company is unable to disclose the acquisition date fair value of the equity interest in Mainstreet Commerce LC immediately before the acquisition date and the valuation techniques and related inputs used to measure the acquisition date fair value. During the year ended December 31, 2013, $0.4 million of acquisition-related costs were incurred to affect the Mainstreet Commerce acquisition, of which $0.3 million is included in the Company’s sales and marketing expense, and $0.1 million is included in the Company’s general and administrative expense. No such expenses were incurred during the year ended December 31, 2012.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Basis of Presentation and Consolidation	'
	Basis of Presentation and Consolidation—The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions have been eliminated in consolidation.
Use of Estimates	'
	Use of Estimates—The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue, cost of revenue, and expenses during the reporting period. Actual results could differ from those estimates.
	On an on-going basis, management evaluates its estimates, including those related to: (1) the realization of tax assets and estimates of tax liabilities, (2) fair values of investments in marketable securities, (3) the recognition and disclosure of contingent liabilities, (4) the collectability of accounts receivable, (5) the evaluation of revenue recognition criteria, including the determination of standalone value and customer life and (6) assumptions used in the Black-Scholes option pricing model to determine the fair value of stock options, including the fair value of the common stock. These estimates are based on historical data and experience, as well as various other factors that management believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources.
Foreign Currency Translation	'
	Foreign Currency Translation—The functional currency of the Company’s foreign subsidiaries is the local currency. All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. Revenue and expenses are translated at the average exchange rate during the period. Translation gains or losses are included as a component of accumulated other comprehensive income (loss) in stockholders’ equity (deficit). Transaction gains or losses that arise from exchange rate fluctuations on transactions denominated in a currency other than the functional currency are included in other income (expenses) in the accompanying consolidated results of operations as incurred. For the years ended December 31, 2013, 2012 and 2011, foreign currency transaction gains (losses) of $0.6 million, $0.1 million, and ($0.1) million, respectively, are included in other expenses in the accompanying consolidated statements of comprehensive loss.
Cash Equivalents and Short-Term Investments	'
	Cash Equivalents and Short-Term Investments—The Company considers all highly liquid investments maturing within 90 days from the date of purchase to be the equivalent of cash for the purpose of balance sheet and statement of cash flows presentation. As of December 31, 2013, $226.1 million of the Company’s cash equivalents were invested in money market funds, and $3.0 million in marketable debt securities.
	Short-term investments in marketable securities are classified as available-for-sale and mature within 12 months from the date of purchase. The Company’s investments in marketable securities are recorded at fair value, with any unrealized gains and losses, net of taxes, reported as a component of stockholders’ equity until realized or until a determination is made that an other-than-temporary decline in market value has occurred. When the Company determines that an other-than-temporary decline has occurred for debt securities that the Company does not then intend to sell, the Company recognizes the credit loss component of an other-than-temporary impairment in other income (expense) and the remaining portion in other comprehensive loss. The credit loss component is identified as the amount of the present value of cash flows not expected to be received over the remaining term of the security, based on cash flow projections. In determining whether an other-than-temporary impairment exists, the Company considers: (i) the length of time and the extent to which the fair value has been less than cost; (ii) the financial condition and near-term prospects of the issuer of the securities; and (iii) the Company’s intent and ability to retain the security for a period of time sufficient to allow for any anticipated recovery in fair value. The cost of marketable securities sold is determined based on the specific identification method and any realized gains or losses on the sale of investments are reflected as a component of interest income or expense. As of December 31, 2013, all of the Company’s short-term investments were marketable debt securities.
Restricted Cash	'
	Restricted Cash—Included in long-term other assets at both December 31, 2013 and 2012 is restricted cash of $0.8 million for three irrevocable standby letters of credit in relation to three of the Company’s office lease agreements. Each letter of credit names the lessor as the beneficiary, and is required to fulfill lease requirements in the event the Company should default on office lease obligations.
Accounts Receivable	'
	Accounts Receivable—Accounts receivable represent trade receivables from customers when the Company has invoiced for software subscriptions and/or services and it has not yet received payment. The Company maintains an allowance for doubtful accounts for the estimated probable losses on uncollectible accounts receivable, and presents accounts receivable net of this allowance. The allowance is based upon a number of factors including the credit worthiness of customers, the Company’s historical experience with customers, the age of the receivable and current market and economic conditions. Such factors are reviewed and updated by the Company on a quarterly basis. Past due balances over 90 days and specified other balances are reviewed individually for collectability, and all other balances are reviewed on an aggregate basis. Account balances are written off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote.
	Activity within the allowance for doubtful accounts is as follows, (in thousands):
		Years Ended December 31,
		2013			2012		2011
	Balance at beginning of year	$	—		$	—	$	—
	Charges		497			—		—
	Write-offs		(38	)		—		—
	Balance at end of year	$	459		$	—	$	—
Concentrations of Credit Risk and Significant Customers	'
	Concentrations of Credit Risk and Significant Customers—Financial instruments that potentially expose the Company to concentrations of credit risk include cash, cash equivalents, restricted cash, marketable securities, and accounts receivable. The Company maintains substantially all of its cash, cash equivalents, and restricted cash with one financial institution, which management believes has a high credit standing. To manage credit risk related to accounts receivable, the Company evaluates the allowances for potential credit losses. To date, losses resulting from uncollected receivables have not exceeded management’s expectations.
	As of December 31, 2013, the Company had one distributor reseller representing 12% of accounts receivable. As of December 31, 2012, the Company had one distributor reseller representing 15% of accounts receivable. During the years ended December 31, 2013 and 2012, no single customer comprised more than 10% of the Company’s revenue. During the year ended December 31, 2011, one customer represented 16% of total revenue.
Property and Equipment	'
	Property and Equipment—Property and equipment are recorded at cost and depreciated using the straight-line method over the estimated useful lives of the related assets, which ranges from three to five years. Leasehold improvements are amortized over the lesser of the term of the lease or the useful life of the asset. When assets are retired or disposed of, the assets and related accumulated depreciation are eliminated from the accounts and any resulting gain or loss is included in the determination of net income or loss. Maintenance and repair expenditures are charged to expense as incurred.
Research and Development and Internal Use Software	'
	Research and Development and Internal Use Software—Research and development expenses consist primarily of personnel and related expenses for the Company’s research and development staff, including salaries, benefits, bonuses and stock-based compensation; the cost of certain third-party contractor costs; and allocated overhead. Expenditures for research and development, other than internal use software costs, are expensed as incurred.
	Software development costs associated with internal use software are capitalized when the preliminary project stage is completed, management has decided to make the project a part of its future offering, and the software will be used to perform the function intended. These capitalized costs include external direct costs of services consumed in developing or obtaining internal-use software, personnel and related expenses for employees who are directly associated with and who devote time to internal-use software projects. Capitalization of these costs cease once the project is substantially complete and the software is ready for its intended purpose. Post-configuration training and maintenance costs are expensed as incurred. Capitalized internal use software costs are amortized to cost of revenue using a straight-line method over its estimated useful life of four years, commencing when the software is ready for its intended use.
	During the years ended December 31, 2013, 2012 and 2011, $0, $0.2 million and $0.4 million, respectively, of internal use software development costs were capitalized. Capitalized internal use software is included in property and equipment.
	Amortization expense related to internal use software totaled $0.2 million, $0.1 million and $0 during the years ended December 31, 2013, 2012 and 2011, respectively. The net book value of capitalized internal use software at December 31, 2013 and 2012 was $0.6 million and $0.8 million, respectively.
Segment and Geographic Information	'
	Segment and Geographic Information—Operating segments are defined as components of an enterprise (business activity from which it earns revenue and incurs expenses) about which discrete financial information is available that is evaluated on a regular basis by the chief operating decision maker, or decision making group, in deciding how to allocate resources and assess performance. The Company’s chief operating decision maker (CODM) is the Chief Executive Officer. The CODM reviews consolidated operating results to make decisions about allocating resources and assessing performance for the entire Company. The CODM views the Company’s operations and manages its business as one operating segment.
	Information about the Company’s operations in different geographic regions is presented in the tables below (in thousands):
		Year Ended December 31,
		2013			2012		2011
	Revenue:
	United States	$	61,655		$	43,365	$	28,445
	Germany		16,549			20,221		19,120
	United Kingdom		13,929			9,813		5,582
	All other international		11,603			6,076		3,400
	Total revenue	$	103,736		$	79,475	$	56,547
	Long-lived assets (at year end):
	United States		8,814			7,976		6,230
	Germany		362			303		174
	United Kingdom		554			15		0
	All other international		60			83		0
	Total long-lived assets	$	9,790		$	8,377	$	6,404
Revenue Recognition	'
	Revenue Recognition—The Company generates revenue from sales of digital commerce solutions via designated sites using the Company’s proprietary technology, which are represented by subscription and support fees and related services, which include application configuration, integration and training.
	The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery to customers has occurred or services have been rendered, the fee is fixed or determinable, and collectability is reasonably assured. The Company does not recognize revenue in excess of the amounts for which it has the right to invoice in an annual subscription year.
	Subscription revenue primarily consists of subscription fees derived from contractually committed minimum levels of gross revenue processed by customers on the Company’s cloud-based digital commerce platform, and fees derived from customers’ gross revenue processed above the minimum contracted levels. Customers do not have the contractual right to take possession of the Company’s on-demand software. Accordingly, the Company recognizes the aggregate minimum subscription fee on a straight-line basis over the subscription term, provided that an enforceable contract has been signed by both parties, access to the Company’s software has been granted to the customer, the fee for the subscription is fixed or determinable and collection is reasonably assured. Should a customer exceed the specified minimum levels of gross revenue processed, fees for customer gross revenue processed in excess of the committed minimum level are billed for the excess volume. The Company recognizes revenue from the fees it receives for its customers’ gross revenue processed in excess of the committed minimum level in the period in which such gross revenue is processed and earned. The Company also derives revenue from setup fees. The setup fees are recorded as deferred revenue and recognized as revenue ratably over the longer of the subscription agreement or the estimated expected life of the customer relationship, as discussed below.
	Service arrangements entered into prior to the customer’s initial use of the Company’s cloud-based digital commerce solutions include implementation services such as integration, application configuration and training. Such services can be performed by the Company, third-party service providers, distributors or customers themselves without the Company’s involvement. However, because such services are generally delivered prior to the customer being able to use the Company’s platform, the Company has concluded that such fees do not have stand-alone value, and the Company recognizes them on a straight-line basis over the longer of the life of the subscription agreement or the estimated expected life of the customer relationship. As the Company gains more experience with customer renewals, the Company continues to evaluate the estimated life of their customers. At December 31, 2012, the Company reassessed the estimated expected life of their customers, increasing it to just over six years. This change in accounting estimate affected the amortization of setup fees and service implementation revenue, decreasing subscription and services revenue by $0.3 million and $1.5 million, respectively, for the year ended December 31, 2013. As a result of the change in estimated expected customer life, the Company’s loss from operations, net loss and net loss per share increased by $1.8 million, $1.8 million and $0.06, respectively, for the year ended December 31, 2013. The Company determined this change in accounting estimate was appropriate due to the increased amount of renewal history available, which provided better insight and improved judgment in determining the estimate. At December 31, 2013, the Company confirmed the estimated expected life of their customers remains just over six years. The Company will continue to evaluate the length of the amortization period and it is possible that, in the future, the estimated expected customer life may change and, if so, the period of amortization will be adjusted.
	Service arrangements entered into subsequent to the customer’s initial use of the Company’s cloud-based digital commerce solutions include assistance with additional instances of the integration, application configuration and training. Such services can be performed by the Company, third-party service providers, distributors or customers themselves without the Company’s involvement and are not necessary for the customer to access and use the Company’s cloud-based digital commerce solutions, and as a result, the Company has concluded that such fees have stand-alone value. The Company has determined that the digital commerce solution has standalone value, because, once a customer launches its initial site, the solution is fully functional and does not require any additional development, modification or customization.
	The Company is not able to determine VSOE or TPE for its deliverables because management has determined that there are no third-party offerings reasonably comparable to the Company’s solution. Accordingly, the selling prices of subscriptions to the solution and services are based on ESP. The determination of ESP requires the Company to make significant estimates and judgments. The Company considers numerous factors, including the size and nature of the deliverables themselves; the geography, market conditions and competitive landscape for the sale; internal costs; and pricing and discounting practices. The determination of ESP is made through consultation with and formal approval by senior management. The Company updates its estimates of ESP on an ongoing basis as events and as circumstances may require.
	After the selling price of revenue allocable to each deliverable in a multiple deliverable arrangement based on the relative selling price method is determined, revenue is recognized for each deliverable based on the type of deliverable. For subscriptions to the Company’s digital commerce platform, revenue is recognized on a straight-line basis over the subscription term, which is typically three years. For services entered into subsequent to the customer’s initial implementation of the Company’s digital commerce solutions, revenue is recognized using the proportional performance method over the period the services are performed.
	Reimbursable costs received for out-of-pocket expenses are recorded as revenue and cost of revenue in the consolidated statements of operations. Sales taxes collected from customers and remitted to government authorities are excluded from revenue.
	Deferred revenue represents amounts billed to customers for which revenue has not been recognized. Deferred revenue consists of the unearned portion of services fees or the unearned portion of fees from subscriptions to the Company’s cloud-based digital commerce solutions.
Cost of Revenue	'
	Cost of Revenue—Cost of subscription revenue primarily consists of hosting costs, data communications expenses, depreciation expenses associated with computer equipment, personnel and related costs, including salaries, bonuses, payroll taxes, recruiting fees and stock compensation, software license fees and amortization expenses associated with capitalized software. In addition, the Company allocates a portion of overhead, such as rent, IT costs, depreciation and amortization and employee benefits costs, to cost of revenue based on headcount.
	Cost of services revenue primarily consists of personnel and related costs, third-party contractors and allocated overhead. The Company’s cost of services revenue is expensed as the costs are incurred.
Impairment of Long-Lived Assets	'
	Impairment of Long-Lived Assets—The Company considers whether indicators of impairment of its long-lived assets are present. If such indicators are present, the Company determines whether the sum of the estimated undiscounted future cash flows attributable to such assets is less than their carrying amount, and if so, the Company recognizes an impairment loss based on the excess of the carrying amount of the assets over their fair value. To date, no such impairment has occurred.
Advertising	'
	Advertising—Advertising costs are charged to operations as incurred and include direct marketing, events, public relations, sales collateral materials and partner programs. Advertising expense was approximately $6.2 million, $4.0 million and $2.0 million for the years ended December 31, 2013, 2012 and 2011, respectively.
Income Taxes	'
	Income Taxes—Deferred tax assets and liabilities are recognized based on temporary differences between the financial reporting and income tax bases of assets and liabilities using rates anticipated to be in effect when such temporary differences reverse. A valuation allowance against deferred tax assets is recorded, based upon the available evidence, if it is more likely than not that some or all of the deferred tax assets will not be realized. The Company assesses its income tax positions and records tax benefits based upon management’s evaluation of the facts, circumstances, and information available at the reporting date. For those tax positions where it is more likely than not that a tax benefit will be sustained, the Company records the largest amount of tax benefit with a greater than 50 percent likelihood of being realized upon ultimate settlement with a taxing authority having full knowledge of all relevant information. For those income tax positions where it is not more likely than not that a tax benefit will be sustained, no tax benefit is recognized in the financial statements. The unrecognized tax benefits are currently presented as a reduction to the deferred tax assets in the financial statements, unless the uncertainty is expected to be resolved within one year. Potential interest and penalties associated with such uncertain tax positions are recorded as a component of income tax expense.
Stock-Based Compensation	'
	Stock-Based Compensation—The Company accounts for all stock options granted to employees and nonemployees using a fair value method. The Black-Scholes option pricing model is used to determine the fair value of the award, which is then recognized on a straight-line basis over the requisite services period, which is the vesting period of the award. The measurement date for employee awards is the date of the grant, and the measurement date for nonemployee awards is the date the performance or services are completed.
Other Comprehensive (Loss) Income	'
	Other Comprehensive (Loss) Income—Other comprehensive (loss) income consists of net loss, foreign currency translation adjustments, and unrealized gains or losses on marketable securities.
Warranties	'
	Warranties—The Company includes service level commitments to its customers warranting certain levels of uptime reliability and performance and permitting those customers to receive credits in the event that the Company fails to meet those levels. To date, the Company has not incurred any material costs as a result of such commitments.
Commissions	'
	Commissions—The Company recognizes commission expense related to subscriptions in the period in which the contract is signed.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements—On July 18, 2013, the Financial Accounting Standards Board issued Accounting Standards Update No. 2013-11, “Presentation of a Liability for an Unrecognized Tax Benefit When a Net Operating Loss or Tax Credit Carryforward Exists.” This accounting update requires that an unrecognized tax benefit be presented as a reduction of a deferred tax asset for a net operating loss (“NOL”) carryforward or other tax credit carryforward when settlement in this manner is available under applicable tax law. This guidance is effective for the Company’s interim and annual periods beginning January 1, 2014. The Company does not believe the adoption of this guidance will have a material impact on the Company’s consolidated financial position, results of operations or cash flows.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Allowance for Doubtful Accounts Receivable	'
	Activity within the allowance for doubtful accounts is as follows, (in thousands):
		Years Ended December 31,
		2013			2012		2011
	Balance at beginning of year	$	—		$	—	$	—
	Charges		497			—		—
	Write-offs		(38	)		—		—
	Balance at end of year	$	459		$	—	$	—
Company's Operations in Different Geographic Regions	'
	Information about the Company’s operations in different geographic regions is presented in the tables below (in thousands):
		Year Ended December 31,
		2013			2012		2011
	Revenue:
	United States	$	61,655		$	43,365	$	28,445
	Germany		16,549			20,221		19,120
	United Kingdom		13,929			9,813		5,582
	All other international		11,603			6,076		3,400
	Total revenue	$	103,736		$	79,475	$	56,547
	Long-lived assets (at year end):
	United States		8,814			7,976		6,230
	Germany		362			303		174
	United Kingdom		554			15		0
	All other international		60			83		0
	Total long-lived assets	$	9,790		$	8,377	$	6,404

Net_Loss_Per_Share_Attributabl1

Net Loss Per Share Attributable to Common Stockholders (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Shares Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stockholders	'
	The following common stock equivalents were excluded from the computation of diluted net loss per share attributable to common stockholders because they had an antidilutive impact (in thousands):
		Year Ended December 31,
		2013		2012		2011
	Options to purchase common stock		3,652		4,421		4,492
	Nonvested restricted stock		880		341		—
	Employee Stock Purchase Plan		7		—		—
	Warrant		—		—		23
	Redeemable convertible preferred stock		—		—		18,028

Cash_Equivalents_and_ShortTerm1

Cash Equivalents and Short-Term Investments (Tables)	12 Months Ended
	Dec. 31, 2013
Cash And Cash Equivalents [Abstract]	'
Cash Equivalents and Available-for-Sale Investments	'
	A summary of the Company’s cash equivalents and short-term investments at December 31, 2013 is as follows (in thousands):
		Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
	Cash Equivalents:
	Money market funds	$	226,130	$	—	$	—		$	226,130
	Certificates of deposit		998		—		—			998
	Municipal securities		2,000		—		—			2,000
		$	229,128	$	—	$	—		$	229,128
	Short-Term Investments:
	U.S. government agency bonds	$	4,500	$	1	$	—		$	4,501
	Corporate bonds and commercial paper		3,318		—		(1	)		3,317
	Municipal securities		19,701		4		(2	)		19,703
	Certificates of deposit		9,612		1		(1	)		9,612
		$	37,131	$	6	$	(4	)	$	37,133
	A summary of the Company’s cash equivalents and short-term investments at December 31, 2012 is as follows (in thousands):
		Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
	Cash Equivalents:
	Money market funds	$	48,089	$	—	$	—		$	48,089
	Certificates of deposit		1,933		—		—			1,933
	Municipal securities		2,070		—		—			2,070
		$	52,092	$	—	$	—		$	52,092
	Short-Term Investments:
	U.S. government agency bonds	$	16,714	$	5	$	—		$	16,719
	Corporate bonds and commercial paper		15,397		2		(1	)		15,398
	Municipal securities		7,412		7		—			7,419
	Certificates of deposit		8,714		1		—			8,715
		$	48,237	$	15	$	(1	)	$	48,251

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis	'
	The following table details the fair value measurements within the fair value hierarchy of the Company’s financial assets and liabilities at December 31, 2013 and 2012 (in thousands):
				Fair Value Measurements Using
		Amounts		Quoted Prices			Significant Other		Significant
		at Fair  Value		in  Active			Observable  Inputs		Unobservable
				Markets for			(Level 2)		Inputs (Level 3)
				Identical  Assets
				(Level 1)
	At December 31, 2013
	Assets—Cash Equivalents:
	Money market funds	$	226,130	$	226,130		$	—	$	—
	Certificates of deposit		998		—			998		—
	Municipal securities		2,000		—			2,000		—
	Assets—Short-Term Investments:
	U.S. government agency bonds	$	4,501	$	—		$	4,501	$	—
	Corporate bonds and commercial paper		3,317		—			3,317		—
	Municipal securities		19,703		—			19,703		—
	Certificates of deposit		9,612		—			9,612		—
	At December 31, 2012
	Assets—Cash Equivalents:
	Money market funds	$	48,089	$	48,089		$	—	$	—
	Certificates of deposit		1,933		—			1,933		—
	Municipal securities		2,070		—			2,070		—
	Assets—Short-Term Investments:
	U.S. government agency bonds	$	16,719	$	—		$	16,719	$	—
	Corporate bonds and commercial paper		15,398		—			15,398		—
	Municipal securities		7,419		—			7,419		—
	Certificates of deposit		8,715		—			8,715		—
Fair Value Measurements	'
	A rollforward of the fair value measurements of the preferred stock warrant liability categorized with Level 3 inputs in the years ended December 31, 2013, 2012 and 2011 is as follows (in thousands):
		December 31,
		2013		2012			2011
	Balance beginning of year	$	—	$	107		$	58
	Change in fair value of warrant liability		—		426			49
	Reclassification of warrant liability to equity		—		(533	)		—
	Balance end of year	$	—	$	—		$	107

Property_and_Equipment_Tables

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Property Plant And Equipment [Abstract]	'
Components of Property and Equipment	'
	Property and equipment as of December 31, 2013 and 2012 consist of the following (in thousands):
		December 31,
		2013			2012
	Computer equipment	$	18,976		$	13,901
	Purchased software, including internal use software		4,134			4,135
	Leasehold improvements		893			332
	Office furniture		1,177			992
	Property and equipment—at cost		25,180			19,360
	Less accumulated depreciation and amortization		(15,390	)		(10,983	)
	Property and equipment—net	$	9,790		$	8,377

Debt_Tables

Debt (Tables)	12 Months Ended
	Dec. 31, 2013
Summary of Future Annual Principal Payments Due Under Loan	'
	As of December 31, 2013, future annual principal payments due under the Loan were as follows (in thousands):
	Years Ending December 31,
	2014	$	2,030
	2015		1,029
	2016		285
			3,344
	Less current portion of notes payable		2,030
	Long-term notes payable	$	1,314
Software Finance Agreement [Member]	'
Summary of Future Annual Principal Payments Due Under Loan	'
	As of December 31, 2013, future annual principal payments due under the Software Finance Agreement were as follows (in thousands):
	Years Ending December 31,
	2014	$	697
	2015		210
			907
	Less current portion of note payable		697
	Long-term notes payable	$	210

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Company's Obligation for Payments Under Leases	'
	The Company’s obligation for payments under these leases is as follows at December 31, 2013 (in thousands):
	Years Ending December 31
	2014	$	2,649
	2015		2,621
	2016		2,375
	2017		1,900
	2018		1,230
	Thereafter		918
	Total minimum lease payments	$	11,693

Warrants_Tables

Warrants (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Summary of Warrant Liability Fair Value Using Black-Scholes Option Pricing Model	'
	The following table includes the fair value of the warrant liability using the Black-Scholes option pricing model and the underlying assumptions used in the model (dollars in thousands):
		March 20, 2012			As of
		(Close of			December  31,
		IPO)			2011
	Fair value of preferred stock warrant liability	$	533		$	107
	Risk-free interest rate		1.56	%		1.45	%
	Expected dividend yield		—			—
	Expected term (in years)		6.25			6.5
	Expected volatility		57.4	%		59.1	%

StockBased_Compensation_Plans_

Stock-Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Common Stock Reserved for Exercise of Stock Options and Release of Restricted Stock	'
	The following number of shares of common stock has been reserved for the exercise of stock options and the release of restricted stock (in thousands):
		As of
		December  31,
		2013
	2004 Stock Option and Grant Plan		1,952
	2012 Stock Incentive Plan		6,304
	Total		8,256
Summary of Stock Options Activity	'
	The summary of stock option activity for the year ended December 31, 2013 is as follows (in thousands, except per share and term information):
		Shares			Weighted-			Weighted-			Aggregate
					Average			Average			Intrinsic
					Exercise			Remaining			Value
					Price			Contractual
								Life (in
								Years)
	Outstanding—January 1, 2013		4,127		$	9.45			7.57		$	77,557
	Granted		290			33.47
	Forfeited		172			21.1
	Expired or cancelled		4			16.63
	Exercised		1,247			6.37
	Outstanding—December 31, 2013		2,994		$	12.39			6.96		$	154,928
	Exercisable—December 31, 2013		2,054		$	5.81			6.34		$	119,747
	Options vested and expected to vest—December 31, 2013		2,929		$	11.92			6.92		$	152,891
Summary of Restricted Stock Activity	'
	The summary of restricted stock activity is as follows (in thousands, except per share and term information):
		Number of			Weighted-
		Shares			Average
					Grant Date
					Fair Value
	Nonvested at December 31, 2012		431		$	30.86
	Granted		752			33.02
	Vested		167			31.64
	Forfeited		55			29.1
	Nonvested at December 31, 2013		961		$	32.51
Summary of Stock-Based Awards Granted and Exercised	'
	The following table summarizes information relating to stock-based awards granted and exercised (in thousands, except per share data):
		Year Ended December 31,
		2013			2012			2011
	Weighted average fair value of options granted	$	16.87		$	16.49		$	3.3
	Aggregate intrinsic value of options exercised		42,099			21,402			5,990
	Cash proceeds received upon exercise of options		7,948			1,282			1,645
Stock-Based Compensation Expense	'
	The following table presents stock-based compensation expense included in the Company’s consolidated statements of comprehensive loss (in thousands):
		Year Ended December 31,
		2013			2012			2011
	Cost of subscription revenue	$	391		$	175		$	20
	Cost of service revenue		1,179			722			93
	Sales and marketing		4,296			1,842			252
	Research and development		3,574			1,509			487
	General and administrative		5,248			2,795			637
		$	14,688		$	7,043		$	1,489
Assumptions Used to Compute Stock-based Compensation Expense	'
	The assumptions used to compute stock-based compensation expense for awards granted are as follows:
		Year Ended December 31,
		2013			2012			2011
	Risk-free interest rate		2.1	%		1.3	%		2.1	%
	Expected dividend yield		—			—			—
	Expected term (in years)		6			6			6
	Weighted average expected volatility		50.42	%		57	%		59.9	%

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Provision for Income Taxes	'
	The provision for income taxes for the years ended December 31, 2013, 2012 and 2011 consists of the following (in thousands):
		December 31,
		2013			2012			2011
	Loss before income taxes:
	Domestic	$	(21,940	)	$	(8,832	)	$	(1,627	)
	International		1,634			1,129			428
		$	(20,306	)	$	(7,703	)	$	(1,199	)
		December 31,
		2013			2012			2011
	Current income tax provision:
	Federal	$	—		$	—		$	—
	State		52			56			55
	Foreign		457			368			157
	Total current income tax provision		509			424			212
	Deferred income tax provision:
	Federal		—			—			—
	State		—			—			—
	Foreign		65			(3	)		—
	Total deferred income tax provision		65			(3	)		—
	Total income tax provision	$	574		$	421		$	212
Effective Income Tax Rate Reconciliation	'
	The differences in total provision for income taxes that would result from applying the 34% federal statutory rate to (loss) income before provision for income taxes and the reported provision for income taxes are as follows:
		Years Ended December 31,
		2013			2012			2011
	U.S. Federal tax expense at statutory rates		34	%		34	%		34	%
	State income taxes, net of federal tax benefit		1	%		1	%		(14	)%
	Foreign rate differential		0	%		1	%		1	%
	Permanent differences		(2	)%		(2	)%		(6	)%
	Stock-based compensation		(5	)%		(5	)%		(15	)%
	Uncertain tax provisions		(1	)%		(1	)%		(9	)%
	Valuation allowance		(30	)%		(33	)%		(9	)%
			(3	)%		(5	)%		(18	)%
Components of Net Deferred Tax Assets	'
	Components of the net deferred tax assets as of December 31, 2013 and 2012 are as follows (in thousands):
		December 31,
		2013			2012
	Operating loss carryforwards	$	12,948		$	16,747
	Capitalized research and development costs		8,433			2,634
	Accrued expenses		5,630			2,897
	Research and development credits		1,160			890
	Deferred revenue		4,192			4,164
	Stock compensation		2,850			1,685
	Depreciation		296			301
	Other		3			—
	Total deferred tax assets		35,512			29,318
	Valuation allowance for deferred tax assets		(35,577	)		(29,315	)
	Net deferred tax assets	$	(65	)	$	3
Changes to Company's Uncertain Tax Positions	'
	The following table indicates the changes to the Company’s unrecognized tax benefits for the years ended December 31 (in thousands):
		2013			2012			2011
	Beginning balance	$	1,061		$	805		$	670
	Increase related to current tax year		357			256			135
	Ending balance	$	1,418		$	1,061		$	805

Selected_Quarterly_Information1

Selected Quarterly Information (Tables)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Summary of Selected Quarterly Information	'
		2013
	(in thousands, except per share amounts)	1st			2nd			3rd			4th
		Quarter			Quarter			Quarter			Quarter
	Revenue	$	20,514		$	23,207		$	24,479		$	35,536
	Gross profit		14,032			16,665			17,428			27,594
	(Loss) income from operations		(7,317	)		(8,413	)		(6,769	)		1,710
	(Loss) income before provision for income taxes		(7,753	)		(8,310	)		(6,147	)		1,904
	Net (loss) income		(7,972	)		(8,455	)		(6,257	)		1,822
	Basic net (loss) earnings per share attributable to common stockholders	$	(0.27	)	$	(0.28	)	$	(0.20	)	$	0.06
	Diluted net (loss) earnings per share attributable to common stockholders	$	(0.27	)	$	(0.28	)	$	(0.20	)	$	0.05
		2012
	(in thousands, except per share amounts)	1st			2nd			3rd			4th
		Quarter			Quarter			Quarter			Quarter
	Revenue	$	16,090		$	18,360		$	18,706		$	26,319
	Gross profit		10,671			12,265			12,215			19,983
	(Loss) income from operations		(1,843	)		(5,083	)		(3,566	)		3,333
	(Loss) income before provision for income taxes		(2,117	)		(5,563	)		(3,432	)		3,409
	Net (loss) income		(2,243	)		(5,633	)		(3,471	)		3,223
	Basic net (loss) earnings per share attributable to common stockholders	$	(0.42	)	$	(0.19	)	$	(0.12	)	$	0.11
	Diluted net (loss) earnings per share attributable to common stockholders	$	(0.42	)	$	(0.19	)	$	(0.12	)	$	0.1

Organization_Additional_Inform

Organization - Additional Information (Detail) (USD $)	1 Months Ended			12 Months Ended
	Dec. 31, 2013	Nov. 30, 2013	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
				Subsidiary
Collaboration Arrangement Disclosure [Abstract]	'	'	'	'	'
Number of subsidiaries owned	'	'	'	7	'
Initial public offering of common stock	'	3,310,098	6,325,000	'	'
Common stock pursuant to underwriters' option	496,515	'	825,000	'	'
Public offering price per share	$57	$57	$16	$57	'
Proceeds from common stock initial public offering	$163,100,000	'	$94,100,000	'	$94,116,000
Offering expenses	500,000	'	3,300,000	500,000	'
Common stock by certain shareholders	'	810,098	'	'	'
Proceeds from sale of common stock by the selling shareholders	$0	'	'	'	'

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
	LetterOfCredit	Customer	Customer
	Customer
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Foreign currency transaction gains (losses)	$600,000	$100,000	($100,000)	'
Liquid investments maturity	'90 days	'	'	'
Cash and cash equivalents	242,425,000	58,877,000	14,939,000	17,148,000
Restricted cash	800,000	800,000	'	'
Number of irrevocable standby letters of credit	3	'	'	'
Past due balances	'90 days	'	'	'
Number of distributor reseller	1	1	'	'
Number of customer comprised more than 10% of revenue	0	0	1	'
Estimated useful life of capitalized internal use software costs	'4 years	'	'	'
Internal use software development costs	0	200,000	400,000	'
Amortization expense related to internal use software	200,000	100,000	0	'
Net book value of capitalized internal use software	600,000	800,000	'	'
Loss from operations	1,800,000	'	'	'
Net loss increased	1,800,000	'	'	'
Net loss per share	$0.06	'	'	'
Service agreement deferred revenue recognition period	'6 years	'	'	'
Advertising expense	6,200,000	4,000,000	2,000,000	'
Tax benefit realized	50.00%	'	'	'
Minimum [Member]	'	'	'	'
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Estimated useful life of property and equipment	'3 years	'	'	'
Maximum [Member]	'	'	'	'
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Estimated useful life of property and equipment	'5 years	'	'	'
Subscription Revenue [Member]	'	'	'	'
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Decreasing revenue	300,000	'	'	'
Cost of Services Revenue [Member]	'	'	'	'
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Decreasing revenue	1,500,000	'	'	'
Accounts Receivable [Member] | Customer two [Member]	'	'	'	'
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Major customer percentage	10.00%	10.00%	'	'
Accounts Receivable [Member] | Customer One [Member]	'	'	'	'
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Major customer percentage	12.00%	15.00%	'	'
Revenue [Member] | Customer Three [Member]	'	'	'	'
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Major customer percentage	'	'	16.00%	'
Money Market Funds [Member]	'	'	'	'
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Cash and cash equivalents	226,100,000	'	'	'
Marketable Debt Securities [Member]	'	'	'	'
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Cash and cash equivalents	$3,000,000	'	'	'

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Allowance for Doubtful Accounts Receivable (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]	'	'	'
Balance at beginning of year	'	'	'
Charges	497	'	'
Write-offs	-38	'	'
Balance at end of year	$459	'	'

Summary_of_Significant_Account5

Summary of Significant Accounting Policies - Company's Operations in Different Geographic Regions (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, 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
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total revenue	$35,536	$24,479	$23,207	$20,514	$26,319	$18,706	$18,360	$16,090	$103,736	$79,475	$56,547
Total long-lived assets	9,790	'	'	'	8,377	'	'	'	9,790	8,377	6,404
All Other International [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total revenue	'	'	'	'	'	'	'	'	11,603	6,076	3,400
Total long-lived assets	60	'	'	'	83	'	'	'	60	83	0
United States [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total revenue	'	'	'	'	'	'	'	'	61,655	43,365	28,445
Total long-lived assets	8,814	'	'	'	7,976	'	'	'	8,814	7,976	6,230
Germany [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total revenue	'	'	'	'	'	'	'	'	16,549	20,221	19,120
Total long-lived assets	362	'	'	'	303	'	'	'	362	303	174
United Kingdom [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total revenue	'	'	'	'	'	'	'	'	13,929	9,813	5,582
Total long-lived assets	$554	'	'	'	$15	'	'	'	$554	$15	$0

Net_Loss_Per_Share_Attributabl2

Net Loss Per Share Attributable to Common Stockholders - Shares Excluded from Computation of Diluted Net loss Per Share Attributable to Common Stockholders (Detail)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Option [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive securities	3,652	4,421	4,492
Restricted Stock Awards [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive securities	880	341	'
Employee Stock Purchase Plan [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive securities	7	'	'
Warrant [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive securities	'	'	23
Redeemable Convertible Preferred Stock [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive securities	'	'	18,028

Cash_Equivalents_and_ShortTerm2

Cash Equivalents and Short-Term Investments - Cash Equivalents and Available-for-Sale Investments (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Cash And Short Term Investments [Line Items]	'	'
Short-Term Investments - Fair Value	$37,133	$48,251
Short-Term Investments [Member]	'	'
Cash And Short Term Investments [Line Items]	'	'
Short-Term Investments - Amortized Cost	37,131	48,237
Unrealized Gains	6	15
Unrealized Losses	-4	-1
Short-Term Investments - Fair Value	37,133	48,251
Short-Term Investments [Member] | U.S. Government Agency Bonds [Member]	'	'
Cash And Short Term Investments [Line Items]	'	'
Short-Term Investments - Amortized Cost	4,500	16,714
Unrealized Gains	1	5
Unrealized Losses	'	'
Short-Term Investments - Fair Value	4,501	16,719
Short-Term Investments [Member] | Corporate Bonds and Commercial Paper [Member]	'	'
Cash And Short Term Investments [Line Items]	'	'
Short-Term Investments - Amortized Cost	3,318	15,397
Unrealized Gains	'	2
Unrealized Losses	-1	-1
Short-Term Investments - Fair Value	3,317	15,398
Short-Term Investments [Member] | Municipal Securities [Member]	'	'
Cash And Short Term Investments [Line Items]	'	'
Short-Term Investments - Amortized Cost	19,701	7,412
Unrealized Gains	4	7
Unrealized Losses	-2	'
Short-Term Investments - Fair Value	19,703	7,419
Short-Term Investments [Member] | Certificates of Deposit [Member]	'	'
Cash And Short Term Investments [Line Items]	'	'
Short-Term Investments - Amortized Cost	9,612	8,714
Unrealized Gains	1	1
Unrealized Losses	-1	'
Short-Term Investments - Fair Value	9,612	8,715
Cash Equivalents [Member]	'	'
Cash And Short Term Investments [Line Items]	'	'
Cash Equivalents - Amortized Cost	229,128	52,092
Unrealized Gains	'	'
Unrealized Losses	'	'
Cash Equivalents - Fair Value	229,128	52,092
Cash Equivalents [Member] | Municipal Securities [Member]	'	'
Cash And Short Term Investments [Line Items]	'	'
Cash Equivalents - Amortized Cost	2,000	2,070
Unrealized Gains	'	'
Unrealized Losses	'	'
Cash Equivalents - Fair Value	2,000	2,070
Cash Equivalents [Member] | Certificates of Deposit [Member]	'	'
Cash And Short Term Investments [Line Items]	'	'
Cash Equivalents - Amortized Cost	998	1,933
Unrealized Gains	'	'
Unrealized Losses	'	'
Cash Equivalents - Fair Value	998	1,933
Cash Equivalents [Member] | Money Market Funds [Member]	'	'
Cash And Short Term Investments [Line Items]	'	'
Cash Equivalents - Amortized Cost	226,130	48,089
Unrealized Gains	'	'
Unrealized Losses	'	'
Cash Equivalents - Fair Value	$226,130	$48,089

Cash_Equivalents_and_ShortTerm3

Cash Equivalents and Short-Term Investments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013
Cash And Cash Equivalents [Abstract]	'
Contractual maturity expiration dates	'1 year

Fair_Value_Measurements_Schedu

Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	$37,133	$48,251
Cash Equivalents [Member] | Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	226,130	48,089
Cash Equivalents [Member] | Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	998	1,933
Cash Equivalents [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	2,000	2,070
Short-Term Investments [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	37,133	48,251
Short-Term Investments [Member] | Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	9,612	8,715
Short-Term Investments [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	19,703	7,419
Short-Term Investments [Member] | U.S. Government Agency Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	4,501	16,719
Short-Term Investments [Member] | Corporate Bonds and Commercial Paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	3,317	15,398
Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Cash Equivalents [Member] | Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	226,130	48,089
Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Cash Equivalents [Member] | Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	'	'
Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Cash Equivalents [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	'	'
Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Short-Term Investments [Member] | Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	'	'
Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Short-Term Investments [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	'	'
Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Short-Term Investments [Member] | U.S. Government Agency Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	'	'
Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Short-Term Investments [Member] | Corporate Bonds and Commercial Paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	'	'
Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] | Cash Equivalents [Member] | Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	'	'
Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] | Cash Equivalents [Member] | Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	998	1,933
Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] | Cash Equivalents [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	2,000	2,070
Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] | Short-Term Investments [Member] | Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	9,612	8,715
Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] | Short-Term Investments [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	19,703	7,419
Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] | Short-Term Investments [Member] | U.S. Government Agency Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	4,501	16,719
Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] | Short-Term Investments [Member] | Corporate Bonds and Commercial Paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	3,317	15,398
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] | Cash Equivalents [Member] | Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	'	'
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] | Cash Equivalents [Member] | Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	'	'
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] | Cash Equivalents [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	'	'
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] | Short-Term Investments [Member] | Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	'	'
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] | Short-Term Investments [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	'	'
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] | Short-Term Investments [Member] | U.S. Government Agency Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	'	'
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] | Short-Term Investments [Member] | Corporate Bonds and Commercial Paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	'	'

Fair_Value_Measurements_Fair_V

Fair Value Measurements - Fair Value Measurements (Detail) (Preferred Stock Warrant [Member], Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Preferred Stock Warrant [Member] | Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair Value Liabilities Measured On Recurring and Nonrecurring Basis [Line Items]	'	'	'
Balance beginning of year	'	$107	$58
Change in fair value of warrant liability	'	426	49
Reclassification of warrant liability to equity	'	-533	'
Balance end of year	'	'	$107

Property_and_Equipment_Compone

Property and Equipment - Components of Property and Equipment (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property and equipment at cost	$25,180	$19,360
Less accumulated depreciation and amortization	-15,390	-10,983
Property and equipment net	9,790	8,377
Computer Equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment at cost	18,976	13,901
Purchased Software, Including Internal Use Software [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment at cost	4,134	4,135
Leasehold Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment at cost	893	332
Office Furniture [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment at cost	$1,177	$992

Property_and_Equipment_Additio

Property and Equipment - 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 Useful Life And Values [Abstract]	'	'	'
Depreciation and amortization expense	$4,385	$3,439	$2,884

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

In Millions, except Share data, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2013

Jun. 30, 2012

Jun. 30, 2011

Apr. 30, 2010

Dec. 31, 2013

30-May-09

31-May-13

31-May-12

Dec. 31, 2013

Dec. 31, 2012

Equipment Line of Credit [Member]

Equipment Line of Credit [Member]

Equipment Line of Credit [Member]

Equipment Line of Credit [Member]

Equipment Line of Credit [Member]

Equipment Line of Credit [Member]

Software Finance Agreement [Member]

Software Finance Agreement [Member]

Software Finance Agreement [Member]

Software Finance Agreement [Member]

Debt Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Secured revolving credit facility maximum

$5

'

'

'

'

'

'

'

'

'

'

'

Interest at a variable rate above prime rate

0.75%

'

'

'

'

'

'

'

'

'

'

'

Shares of common stock purchased on conversion of preferred stock into warrant

23,092

'

'

'

'

'

'

'

'

'

'

'

Shares of common stock exercise price

$3.90

'

'

'

'

'

'

'

'

'

'

'

Issuance of shares of common stock

20,186

'

'

'

'

'

'

'

'

'

'

'

Equipment line of credit

'

'

'

'

'

'

'

2

'

'

'

'

Increase in available equipment line of credit borrowings

'

'

3

3

4

4

'

'

'

'

'

'

Initial drawdown of loan due in equal monthly payments

'

'

'

'

'

'

'36 equal months

'

'

'

'

'

Annual interest rate

'

'

'

'

'

'

3.75%

'

'

5.40%

'

'

Outstanding balance under the Software Finance Agreement

3.3

4.1

'

'

'

'

'

'

'

'

0.9

1.3

Available borrowings under the Loan for eligible equipment purchases

1.6

'

'

'

'

'

'

'

'

'

'

'

Purchase of software license

'

'

'

'

'

'

'

'

'

1.8

'

'

Frequency of payments

'

'

'

'

'

'

'

'

'

'12 equal quarterly payments

'

'

Agreement Expiration Date

'

'

'

'

'

'

'

'

'

'

1-Apr-15

'

Increased financed amount

'

'

'

'

'

'

'

'

$0.60

'

'

'

Debt_Summary_of_Future_Annual_

Debt - Summary of Future Annual Principal Payments Due Under Loan (Detail) (Loan Agreement [Member], USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Loan Agreement [Member]	'
Debt [Line Items]	'
2014	$2,030
2015	1,029
2016	285
Total	3,344
Less current portion of notes payable	2,030
Long-term notes payable	$1,314

Debt_Summary_of_Future_Annual_1

Debt - Summary of Future Annual Principal Payments Due under Software Finance Agreement (Detail) (Software Finance Agreement [Member], USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Software Finance Agreement [Member]	'
Debt [Line Items]	'
2014	$697
2015	210
Total	907
Less current portion of note payable	697
Long-term notes payable	$210

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended						1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2011	Feb. 29, 2012	Jan. 31, 2011
				Co-location Services [Member]	Co-location Services [Member]	Co-location Services [Member]	Funding Agreement [Member]	Funding Agreement [Member]
Long-term Purchase Commitment [Line Items]	'	'	'	'	'	'	'	'
Rent expense	$2,600,000	$2,100,000	$1,000,000	$3,200,000	$2,500,000	$1,500,000	'	'
Operating lease expiration year	'2021	'	'	'	'	'	'	'
Operating lease period	'24 months	'	'	'	'	'	'	'
Agreement expire date	'2016-01	'	'	'	'	'	'	'
Future minimum payments in 2014	'	'	'	4,000,000	'	'	'	'
Future minimum payments in 2015	'	'	'	2,800,000	'	'	'	'
Future minimum payments in 2016	'	'	'	11,000	'	'	'	'
Amount lent to Chinese entity	'	'	'	'	'	'	'	150,000
Additional amount funded	'	'	'	'	'	'	$16,000	'

Commitments_and_Contingencies_2

Commitments and Contingencies - Company's Obligation for Payments Under Leases (Detail) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Commitments And Contingencies Disclosure [Abstract]	'
2014	$2,649
2015	2,621
2016	2,375
2017	1,900
2018	1,230
Thereafter	918
Total minimum lease payments	$11,693

Capitalization_Additional_Info

Capitalization - Additional Information (Detail) (USD $)	0 Months Ended
	Mar. 20, 2012	Dec. 31, 2013	Dec. 31, 2012
Equity [Abstract]	'	'	'
Common stock, shares authorized	'	240,000,000	240,000,000
Common stock, par value	'	$0.01	$0.01
Preferred stock, shares authorized	'	10,000,000	10,000,000
Preferred stock, par value	'	$0.01	$0.01
Preferred stock, shares issued	'	0	'
Preferred stock, shares outstanding	'	0	'
Redeemable convertible preferred stock converted into share of common stock upon closing of IPO	18,028,763	'	'

Warrants_Additional_Informatio

Warrants - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Class of Warrant or Right [Line Items]	'	'	'
Shares of common stock purchased on conversion of preferred stock into warrant	23,092	'	'
Shares of common stock purchased on conversion of preferred stock into warrant, price per share	$3.90	'	'
Exercisable warrant, expiration date	'July 2018	'	'
Fair value of warrant at the time of conversion of warrant upon closing of IPO	$500,000	'	'
Issuance of common stock	20,186	'	'
Other Income Expense [Member]	'	'	'
Class of Warrant or Right [Line Items]	'	'	'
Income (loss) from change in fair value of warrant	$0	($400,000)	($49,000)

Warrants_Summary_of_Warrant_Li

Warrants - Summary of Warrant Liability Fair Value Using Black-Scholes Option Pricing Model (Detail) (Warrant [Member], USD $)	0 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 20, 2012	Dec. 31, 2011
Warrant [Member]	'	'
Class of Warrant or Right [Line Items]	'	'
Fair value of preferred stock warrant liability	$533	$107
Risk-free interest rate	1.56%	1.45%
Expected dividend yield	'	'
Expected term (in years)	'6 years 3 months	'6 years 6 months
Expected volatility	57.40%	59.10%

StockBased_Compensation_Plans_1

Stock-Based Compensation Plans - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Common stock, shares authorized	240,000,000	240,000,000	240,000,000	'
Stock-based compensation cost	'	$14,688,000	$7,043,000	$1,489,000
Restricted Stock Awards [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Restricted stock units share based compensation awards granted	25,000	752,000	'	'
Stock-based compensation cost	'	8,000,000	2,800,000	400,000
Unrecognized compensation expense	26,700,000	26,700,000	'	'
Weighted average period	'	'2 years 10 months 24 days	'	'
Stock Option Plan [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Unrecognized compensation expense	11,900,000	11,900,000	'	'
Weighted average period	'	'2 years 6 months	'	'
Stock Option [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Share-based compensation vesting period	'	'4 years	'	'
Employee Stock Purchase Plan [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Maximum shares employees to purchase	400,000	400,000	'	'
Percentage of purchase price of stock	'	85.00%	'	'
Number of shares issued during period	'	14,934	'	'
Exercise price of share	$36.47	$36.47	'	'
Cash proceeds from issuance of shares	'	$500,000	'	'
Maximum [Member] | 2012 Plan [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Common stock pursuant to stock options and stock awards, shares issued	'	6,749,678	'	'
Maximum [Member] | Restricted Stock Awards [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Share-based compensation vesting period	'	'4 years	'	'
Minimum [Member] | Restricted Stock Awards [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Share-based compensation vesting period	'	'2 years	'	'

StockBased_Compensation_Plans_2

Stock-Based Compensation Plans - Common Stock Reserved for Exercise of Stock Options and Release of Restricted Stock (Detail)	Dec. 31, 2013
In Thousands, unless otherwise specified
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Common Stock reserved for conversion of Preferred Stock and exercise of stock options and warrants	8,256
2004 Stock Option and Grant Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Common Stock reserved for conversion of Preferred Stock and exercise of stock options and warrants	1,952
2012 Stock Incentive Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Common Stock reserved for conversion of Preferred Stock and exercise of stock options and warrants	6,304

StockBased_Compensation_Plans_3

Stock-Based Compensation Plans - Summary of Stock Options Activity (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'
Outstanding Shares-January 1, 2013	4,127	'
Granted, Shares	290	'
Forfeited, Shares	172	'
Expired or cancelled, Shares	4	'
Exercised, Shares	1,247	'
Outstanding Shares-December 31, 2013	2,994	4,127
Exercisable Shares-December 31, 2013	2,054	'
Options vested and expected to vest, Shares-December 31, 2013	2,929	'
Outstanding Weighted-Average Exercise Price-January 1, 2013	$9.45	'
Granted, Weighted-Average Exercise Price	$33.47	'
Forfeited, Weighted-Average Exercise Price	$21.10	'
Expired or cancelled, Weighted-Average Exercise Price	$16.63	'
Exercised, Weighted-Average Exercise Price	$6.37	'
Outstanding Weighted-Average Exercise Price-December 31, 2013	$12.39	$9.45
Exercisable Weighted-Average Exercise Price-December 31, 2013	$5.81	'
Options vested and expected to vest, Weighted-Average Exercise Price-December 31, 2013	$11.92	'
Outstanding, Weighted-Average Remaining Contractual Life (in Years)	'6 years 11 months 16 days	'7 years 6 months 26 days
Exercisable, Weighted-Average Remaining Contractual Life (in Years)-December 31, 2013	'6 years 4 months 2 days	'
Options vested and expected to vest, Weighted-Average Remaining Contractual Life (in Years)-December 31, 2013	'6 years 11 months 1 day	'
Outstanding, Aggregate Intrinsic Value-January 1, 2013	$77,557	'
Outstanding, Aggregate Intrinsic Value-December 31, 2013	154,928	77,557
Exercisable, Aggregate Intrinsic Value-December 31, 2013	119,747	'
Options vested and expected to vest, Aggregate Intrinsic Value-December 31, 2013	$152,891	'

StockBased_Compensation_Plans_4

Stock-Based Compensation Plans - Summary of Restricted Stock Activity (Detail) (Restricted Stock Awards [Member], USD $)	1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013
Restricted Stock Awards [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Nonvested, Number of Shares, Beginning Balance	'	431,000
Granted, Number of Shares	25,000	752,000
Vested, Number of Shares	'	167,000
Forfeited, Number of Shares	'	55,000
Nonvested, Number of Shares, Ending Balance	961,000	961,000
Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance	'	$30.86
Granted, Weighted Average Grant Date Fair Value	'	$33.02
Vested, Weighted Average Grant Date Fair Value	'	$31.64
Forfeited, Weighted Average Grant Date Fair Value	'	$29.10
Nonvested, Weighted Average Grant Date Fair Value, Ending Balance	$32.51	$32.51

StockBased_Compensation_Plans_5

Stock-Based Compensation Plans - Summary of Stock-Based Awards Granted and Exercised (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'	'
Weighted average fair value of options granted	$16.87	$16.49	$3.30
Aggregate intrinsic value of options exercised	$42,099	$21,402	$5,990
Cash proceeds received upon exercise of options	$7,948	$1,282	$1,645

StockBased_Compensation_Plans_6

Stock-Based Compensation Plans - Stock-Based Compensation Expense (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]	'	'	'
Stock-based compensation cost	$14,688	$7,043	$1,489
Cost of Subscription Revenue [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation cost	391	175	20
Cost of Services Revenue [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation cost	1,179	722	93
Sales and Marketing [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation cost	4,296	1,842	252
Research and Development [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation cost	3,574	1,509	487
General and Administration [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation cost	$5,248	$2,795	$637

StockBased_Compensation_Plans_7

Stock-Based Compensation Plans - Assumptions Used to Compute Stock-based Compensation Expense (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'	'
Risk-free interest rate	2.10%	1.30%	2.10%
Expected dividend yield	'	'	'
Expected term (in years)	'6 years	'6 years	'6 years
Weighted average expected volatility	50.42%	57.00%	59.90%

Income_Taxes_Provision_for_Inc

Income Taxes - Provision for Income Taxes (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, 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
Loss before income taxes:	'	'	'	'	'	'	'	'	'	'	'
Domestic	'	'	'	'	'	'	'	'	($21,940)	($8,832)	($1,627)
International	'	'	'	'	'	'	'	'	1,634	1,129	428
(Loss) income before provision for income taxes	1,904	-6,147	-8,310	-7,753	3,409	-3,432	-5,563	-2,117	-20,306	-7,703	-1,199
Current income tax provision:	'	'	'	'	'	'	'	'	'	'	'
Federal	'	'	'	'	'	'	'	'	'	'	'
State	'	'	'	'	'	'	'	'	52	56	55
Foreign	'	'	'	'	'	'	'	'	457	368	157
Total current income tax provision	'	'	'	'	'	'	'	'	509	424	212
Deferred income tax provision:	'	'	'	'	'	'	'	'	'	'	'
Federal	'	'	'	'	'	'	'	'	'	'	'
State	'	'	'	'	'	'	'	'	'	'	'
Foreign	'	'	'	'	'	'	'	'	65	-3	'
Total deferred income tax provision	'	'	'	'	'	'	'	'	65	-3	'
Total income tax provision	'	'	'	'	'	'	'	'	$574	$421	$212

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax [Line Items]	'	'	'
Federal statutory rate to (loss) income before provision for income taxes	34.00%	34.00%	34.00%
Valuation allowance increase decrease	$6.30	$2.70	$1
Federal net operating loss carryforwards	93.8	'	'
State net operating loss carryforwards	51.3	'	'
Net operating loss carryforwards expire	'Through 2033	'	'
Equity impact due to realization of deferred tax assets	22	'	'
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0	'	'
Research and development tax credit carryforwards [Member]	'	'	'
Income Tax [Line Items]	'	'	'
Federal and state research and development tax credit carryforwards	0.9	'	'
State [Member] | Research and development tax credit carryforwards [Member]	'	'	'
Income Tax [Line Items]	'	'	'
Federal and state research and development tax credit carryforwards	$0.60	'	'

Income_Taxes_Effective_Income_

Income Taxes - Effective Income Tax Rate Reconciliation (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
U.S. Federal tax expense at statutory rates	34.00%	34.00%	34.00%
State income taxes, net of federal tax benefit	1.00%	1.00%	-14.00%
Foreign rate differential	0.00%	1.00%	1.00%
Permanent differences	-2.00%	-2.00%	-6.00%
Stock-based compensation	-5.00%	-5.00%	-15.00%
Uncertain tax provisions	-1.00%	-1.00%	-9.00%
Valuation allowance	-30.00%	-33.00%	-9.00%
Effective income tax rate	-3.00%	-5.00%	-18.00%

Income_Taxes_Components_of_Net

Income Taxes - Components of Net Deferred Tax Assets (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Income Tax Disclosure [Abstract]	'	'
Operating loss carryforwards	$12,948	$16,747
Capitalized research and development costs	8,433	2,634
Accrued expenses	5,630	2,897
Research and development credits	1,160	890
Deferred revenue	4,192	4,164
Stock compensation	2,850	1,685
Depreciation	296	301
Other	3	'
Total deferred tax assets	35,512	29,318
Valuation allowance for deferred tax assets	-35,577	-29,315
Net deferred tax assets	($65)	$3

Income_Taxes_Changes_to_Compan

Income Taxes - Changes to Company's Uncertain Tax Positions (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
Beginning balance	$1,061	$805	$670
Increase related to current tax year	357	256	135
Ending balance	$1,418	$1,061	$805

Employee_Benefits_Additional_I

Employee Benefits - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013
Schedule Of Sale Of Subsidiary [Abstract]	'
Participants contribution percentage	20.00%

Selected_Quarterly_Information2

Selected Quarterly Information - Summary of Selected Quarterly Information (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per 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
Quarterly Financial Information Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Revenue	$35,536	$24,479	$23,207	$20,514	$26,319	$18,706	$18,360	$16,090	$103,736	$79,475	$56,547
Gross profit	27,594	17,428	16,665	14,032	19,983	12,215	12,265	10,671	75,719	55,134	36,840
(Loss) income from operations	1,710	-6,769	-8,413	-7,317	3,333	-3,566	-5,083	-1,843	-20,789	-7,159	-756
(Loss) income before provision for income taxes	1,904	-6,147	-8,310	-7,753	3,409	-3,432	-5,563	-2,117	-20,306	-7,703	-1,199
Net (loss) income	$1,822	($6,257)	($8,455)	($7,972)	$3,223	($3,471)	($5,633)	($2,243)	($20,880)	($8,124)	($1,411)
Basic net (loss) earnings per share attributable to common stockholders	$0.06	($0.20)	($0.28)	($0.27)	$0.11	($0.12)	($0.19)	($0.42)	'	'	'
Diluted net (loss) earnings per share attributable to common stockholders	$0.05	($0.20)	($0.28)	($0.27)	$0.10	($0.12)	($0.19)	($0.42)	'	'	'

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	12 Months Ended						0 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Jan. 23, 2014
	Mainstreet Commerce Acquisitions [Member]	Mainstreet Commerce Acquisitions [Member]	Sales and Marketing [Member]	Sales and Marketing [Member]	General and Administration [Member]	General and Administration [Member]	Subsequent Events [Member]
			Mainstreet Commerce Acquisitions [Member]	Mainstreet Commerce Acquisitions [Member]	Mainstreet Commerce Acquisitions [Member]	Mainstreet Commerce Acquisitions [Member]
Subsequent Event [Line Items]	'	'	'	'	'	'	'
Acquisition date	'	'	'	'	'	'	23-Jan-14
Percentage of interest acquired	'	'	'	'	'	'	100.00%
Business acquisition cash consideration	'	'	'	'	'	'	$19.40
Consideration in escrow account	'	'	'	'	'	'	10
Contingent earn-out payments	'	'	'	'	'	'	7
Purchase price allocated to the acquisition	'	'	'	'	'	'	12.4
Business combination related acquisition cos	$0.40	$0	$0.30	$0	$0.10	$0	'