Demandware (DWRE) 10-Q 4 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 30, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Entity Registrant Name	'DEMANDWARE INC	'
Entity Central Index Key	'0001301031	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	36,309,668

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$160,249	$242,425
Short-term investments	98,818	37,133
Accounts receivable-net of allowance for doubtful accounts of $763 and $459 at September 30, 2014 and December 31, 2013, respectively	26,948	28,402
Prepaid expenses and other current assets	9,163	4,315
Total current assets	295,178	312,275
Property and equipment, net	13,958	9,790
Purchased intangible assets, net	2,103	'
Goodwill	8,966	'
Other assets	3,512	1,866
Total assets	323,717	323,931
Current liabilities:	'	'
Current portion of notes payable	'	2,727
Accounts payable	1,687	3,174
Accrued expenses	16,919	17,362
Deferred revenue	22,212	19,609
Deferred rent	218	184
Total current liabilities	41,036	43,056
Long-term liabilities:	'	'
Deferred revenue	21,148	18,862
Notes payable	'	1,524
Deferred rent	1,021	884
Total liabilities	63,205	64,326
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, 35,016 and 34,268 shares issued and outstanding at September 30, 2014 and December 31, 2013, respectively	350	343
Additional paid-in capital	382,703	356,766
Accumulated other comprehensive (loss) gain	-176	64
Accumulated deficit	-122,365	-97,568
Total stockholders' equity	260,512	259,605
Total liabilities and stockholders' equity	$323,717	$323,931

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Accounts receivable, allowance for doubtful accounts	$763	$459
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	240,000,000	240,000,000
Common stock, shares issued	35,016,000	34,268,000
Common stock, shares outstanding	35,016,000	34,268,000

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations and Comprehensive Loss (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue:	'	'	'	'
Subscription	$34,281	$22,563	$96,691	$62,274
Services	3,946	1,916	9,799	5,926
Total revenue	38,227	24,479	106,490	68,200
Cost of revenue:	'	'	'	'
Subscription	6,907	4,325	18,607	12,369
Services	3,878	2,726	11,091	7,706
Total cost of revenue	10,785	7,051	29,698	20,075
Gross profit	27,442	17,428	76,792	48,125
Operating expenses:	'	'	'	'
Sales and marketing	15,668	12,918	49,772	38,474
Research and development	8,795	5,439	23,806	15,556
General and administrative	8,630	5,840	26,386	16,594
Total operating expenses	33,093	24,197	99,964	70,624
Loss from operations	-5,651	-6,769	-23,172	-22,499
Other (expense) income:	'	'	'	'
Interest income	80	49	221	166
Interest expense	-41	-55	-124	-202
Other (expense) income	-1,042	628	-1,031	325
Other (expense) income, net	-1,003	622	-934	289
Loss before income taxes	-6,654	-6,147	-24,106	-22,210
Income tax expense	199	110	691	474
Net loss	-6,853	-6,257	-24,797	-22,684
Net loss per share, basic and diluted	($0.20)	($0.20)	($0.71)	($0.75)
Weighted average common shares outstanding, basic and diluted	34,958	30,710	34,695	30,314
Net loss	-6,853	-6,257	-24,797	-22,684
Other comprehensive (loss) income:	'	'	'	'
Foreign currency translation adjustments	-238	85	-236	49
Unrealized (loss) gain on marketable securities, net of tax	-4	7	-4	-13
Comprehensive loss	($7,095)	($6,165)	($25,037)	($22,648)

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net loss	($24,797)	($22,684)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:	'	'
Depreciation and amortization	4,515	3,293
Bad debt expense	369	433
Stock-based compensation	19,371	10,833
Consulting expense settled with a restricted stock unit award	273	'
Deferred rent expense	172	-9
Amortization of premium on marketable securities	593	451
Other non-cash reconciling items	197	16
Changes in operating assets and liabilities:	'	'
Accounts receivable	1,596	-1,272
Prepaid expenses and other current assets	-4,861	-544
Other long term assets	-1,849	-286
Accounts payable	-917	-1,437
Accrued expenses	-277	9,008
Deferred revenue	4,721	10,867
Net cash (used in) provided by operating activities	-894	8,669
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Purchase of property and equipment	-8,568	-4,335
Purchase of marketable securities	-111,513	-47,694
Acquisition, net of cash acquired	-12,136	'
Sale and maturity of marketable securities	49,231	49,823
Increase in restricted cash and other assets	-19	-167
Net cash used in investing activities	-83,005	-2,373
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from shares purchased under Employee Stock Purchase Plan	643	'
Proceeds from exercise of stock options	5,658	5,126
Proceeds from issuance of notes payable	'	1,997
Payments of equipment notes	-3,345	-2,146
Payments of software financing agreement	-766	-706
Net cash provided by financing activities	2,190	4,271
EFFECT OF EXCHANGE RATES ON CASH AND CASH EQUIVALENTS	-467	123
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	-82,176	10,690
CASH AND CASH EQUIVALENTS-Beginning of period	242,425	58,877
CASH AND CASH EQUIVALENTS-End of period	160,249	69,567
SUPPLEMENTARY INFORMATION:	'	'
Interest paid	101	196
Income taxes paid	677	257
NON-CASH INVESTING AND FINANCING ACTIVITIES:	'	'
Purchase of property and equipment included in accounts payable and accrued expenses	23	4
Software license technical support acquired by assuming directly related liabilities	'	$561

Organization_and_Summary_of_Si

Organization and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Organization and Summary of Significant Accounting Policies	'
	1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Company Overview—Demandware, Inc. (the “Company”) provides enterprise-class cloud-based digital commerce solutions that enable companies to easily 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, secure and open Demandware Commerce platform to create a seamless brand experience for consumers across all digital touch points globally.
	The Company sells subscriptions to its software and related services through both a direct sales force and indirect channels. The Company’s current 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 categories.
	The Company’s headquarters are located in Burlington, Massachusetts.
	On September 30, 2014, the Company signed a definitive agreement with SunBridge Corporation, an international venture capital and professional services firm, to establish a joint venture, Demandware K.K., in Japan. Immediately prior to the incorporation of Demandware K.K., the Company will contribute 300 million Japanese Yen to Demandware K.K. in return for 75% of its outstanding shares of common stock. The incorporation of Demandware K.K. is contingent upon approval from the Legal Affairs Bureau of Japan. As of September 30, 2014, the Company had not contributed to the joint venture.
	Public Stock Offering—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.
	Basis of Presentation and Significant Accounting Policies—The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) applicable to interim periods, under the rules and regulations of the United States Securities and Exchange Commission ( “SEC”), and on a basis substantially consistent with the audited consolidated financial statements of the Company as of and for the fiscal year ended December 31, 2013. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of the results of operations for the interim periods reported and of the Company’s financial condition as of the date of the interim balance sheet. The Company considers events or transactions that occur after the balance sheet date but before the financial statements are issued to provide additional information relative to certain estimates or to identify matters that require additional disclosure. Interim results are not necessarily indicative of the results for any other interim period or for the entire year.
	The condensed consolidated balance sheet at December 31, 2013 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP. The accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K filed with the SEC on March 3, 2014.
	Recent Accounting Pronouncements—Effective January 1, 2014, the Company adopted Accounting Standards Update (“ASU”) 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. The adoption of this guidance did not have a material impact on the Company’s consolidated financial position, results of operations or cash flows.
	In May 2014, the Financial Accounting Standards Board issued ASU No. 2014-09, “Revenue from Contracts with Customers”. The comprehensive new standard will supersede existing revenue recognition guidance and require revenue to be recognized when promised goods or services are transferred to customers in amounts that reflect the consideration to which the Company expects to be entitled in exchange for those goods or services. The guidance will also require that certain contract costs incurred to obtain or fulfill a contract, such as sales commissions, be capitalized as an asset and amortized as revenue is recognized. Adoption of the new rules could affect the timing of both revenue recognition and the recognition of contract costs for certain transactions. The guidance permits two implementation approaches, one requiring retrospective application of the new standard with restatement of prior years and one requiring prospective application of the new standard with disclosure of results under old standards. The new standard is effective for reporting periods beginning after December 15, 2016 and early adoption is not permitted. For the Company, the new standard will be effective January 1, 2017. The Company is currently evaluating the impact of adoption and the implementation approach to be used.

Net_Loss_Per_Share

Net Loss Per Share	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Net Loss Per Share	'
	2. NET LOSS PER SHARE
	The Company calculates basic and diluted net loss per common share by dividing the net loss 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, and shares under the Company’s Employee Stock Purchase Plan (“ESPP”), 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 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 anti-dilutive impact (in thousands):
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Options to purchase common stock		2,757		3,468		2,854		3,829
	Unvested restricted stock		1,211		915		1,178		861
	Employee Stock Purchase Plan		20		15		14		5

Business_Combination

Business Combination	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Business Combination	'
	3. BUSINESS COMBINATION
	On January 22, 2014, the Company acquired 100% of the equity of Mainstreet Commerce LC (“Mainstreet”), a provider of cloud-based distributed order management solutions, for total cash consideration of $19.4 million. $10.0 million of the total consideration was held in escrow and is being released ratably in quarterly payments through January 2016. $7.0 million of the amount in escrow is reserved for payments to key Mainstreet employees for post-combination employment services, and therefore is recorded as a prepayment in the Company’s condensed consolidated balance sheet, and will be recognized in the Company’s post-combination financial statements as compensation expense over the employment period. The remaining $3.0 million in escrow is being withheld following the close of the transaction as protection against certain losses the Company may incur in the event of certain breaches of representations, warranties and covenants and other specified claims set forth in the purchase agreement, and therefore is included in the purchase price of $12.4 million. For federal income tax purposes, the transaction is treated as an asset acquisition. The goodwill resulting from this transaction is expected to be deductible for tax purposes. During the nine months ended September 30, 2014, the Company incurred transaction costs in connection with the acquisition of $0.1 million, which are included in general and administrative expenses. Including prior periods not presented, the Company has incurred transaction costs in connection with the acquisition of $0.5 million through September 30, 2014.
	Under the acquisition method of accounting, the Company allocated the purchase price to the identifiable assets and liabilities based on their estimated fair value, which was determined by management using the information available as of the date of the acquisition (Level 3 inputs).
	Methodologies used in valuing the intangible assets include, but are not limited to, the replacement cost method for customer relationships, relief from royalty for trademarks and multiple period excess earnings method for developed technology. The excess of the purchase price over the total net identifiable assets has been recorded as goodwill, which includes synergies expected from the expanded service capabilities and the value of the assembled work force in accordance with GAAP.
	The allocation of the Mainstreet consideration to the assets acquired and obligations assumed was as follows (in thousands):
	Cash	$	261
	Accounts receivable		511
	Developed technology		2,500
	Customer relationships		300
	Trademarks		10
	Goodwill		8,966
	Other assets / liabilities, net		(151	)
	Total purchase price	$	12,397
	The Company will amortize the customer relationships over approximately five years and trademarks over one year on a straight-line basis. The Company will amortize the developed technology over five years based upon the pattern in which the economic benefits related to the developed technology are realized; however, such amortized amounts are not less than amounts that would be amortized over a straight-line basis. Comparative pro forma financial information for this acquisition has not been presented because the acquisition is not material to the Company’s consolidated results of operations.

Cash_Equivalents_and_ShortTerm

Cash Equivalents and Short-Term Investments	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014 is as follows (in thousands):
		Amortized		Unrealized		Unrealized			Fair
		Cost		Gains		Losses			Value
	Cash Equivalents:
	Money market funds	$	138,405	$	—	$	—		$	138,405
	Certificates of deposit		498		—		—			498
	Municipal securities		3,000		—		—			3,000
		$	141,903	$	—	$	—		$	141,903
	Short-Term Investments:
	U.S. government agency bonds	$	22,417	$	2	$	—		$	22,419
	Corporate bonds		9,435		—		(2	)		9,433
	International government bonds		9,068		1		—			9,069
	Municipal securities		25,365		4		(5	)		25,364
	Certificates of deposit		32,535		1		(3	)		32,533
		$	98,820	$	8	$	(10	)	$	98,818
	A summary of the Company’s cash equivalents and short-term investments at December 31, 2013 is as follows (in thousands):
		Amortized		Unrealized		Unrealized			Fair
		Cost		Gains		Losses			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
	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	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014 and December 31, 2013. 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.
	GAAP defines 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 September 30, 2014 and December 31, 2013 (in thousands):
					Fair Value Measurements Using
			Amounts		Quoted		Significant		Significant
			at Fair		Prices in		Other		Unobservable
			Value		Active		Observable		Inputs
					Markets		Inputs		(Level 3)
					for		(Level 2)
					Identical
					Assets
					(Level 1)
	At September 30, 2014
	Assets—Cash Equivalents:
	Money market funds		$	138,405	$	138,405	$	—	$	—
	Certificates of deposit			498		—		498		—
	Municipal securities			3,000		—		3,000		—
	Assets—Short-Term Investments:
	U.S. government agency bonds		$	22,419	$	—	$	22,419	$	—
	Corporate bonds and commercial paper			9,433		—		9,433		—
	International government bonds			9,069		—		9,069		—
	Municipal securities			25,364		—		25,364		—
	Certificates of deposit			32,533		—		32,533		—
	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		—
	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. As of September 30, 2014 and December 31, 2013, the Company did not carry Level 3 assets or liabilities.

Debt

Debt	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Debt	'
	6. DEBT
	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 was payable in 36 equal monthly payments of principal, plus accrued interest, at an annual rate of 3.75%. In September 2014, the Company paid the outstanding balance in full. The 2008 Loan Agreement had been secured by substantially all of the Company’s assets, except its intellectual property.
	At September 30, 2014 and December 31, 2013, the outstanding balance under the Loan was zero and $3.3 million, respectively. As of September 30, 2014, the Company did not have any available borrowings under the Loan for eligible equipment purchases.
	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 had been secured by the financed assets. The financed amount was 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, and increased the financed amount by $0.6 million. In February 2014, the Company paid the outstanding balance under the Software Finance Agreement in full. At September 30, 2014 and December 31, 2013, the outstanding balance under the Software Finance Agreement was zero and $0.9 million, respectively.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	7. COMMITMENTS AND CONTINGENCIES
	Litigation—In the ordinary course of business, the Company is involved in litigation incidental to its business, certain of which includes speculative claims for substantial or indeterminate amounts of damages. 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 a loss. The Company’s management is not aware of any pending legal proceeding or other loss contingency, whether asserted or unasserted, affecting the Company for which it might become liable or the outcome of which management expects to have a material impact on the Company. However, the outcome of legal matters is inherently unpredictable and subject to significant uncertainties.

StockBased_Awards

Stock-Based Awards	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Awards	'
	8. STOCK-BASED AWARDS
	Stock Options—The Company’s stock options generally vest over a four-year period and expire 10 years from the date of grant. Upon option exercise, the Company issues shares of common stock.
	The following table summarizes information related to stock options outstanding as of September 30, 2014 (in thousands, except per share and term information):
		Shares		Weighted-		Weighted-		Aggregate
				Average		Average		Intrinsic
				Exercise		Remaining		Value
				Price		Contractual
				(per Share)		Life
						(in Years)
	Exercisable—September 30, 2014		1,955	$	6.78		5.57	$	86,309
	Options vested and expected to vest—September 30, 2014		2,687	$	15.32		6.28	$	98,057
	Unrecognized compensation expense relating to stock options was $14.1 million at September 30, 2014, which is expected to be recognized over a weighted-average period of approximately three years.
	Restricted Stock Awards—The Company’s restricted stock awards generally vest over a two- or four-year period, and upon vesting, the Company issues shares of common stock. Unrecognized compensation expense relating to restricted stock awards was $50.3 million at September 30, 2014, which is expected to be recognized over a weighted-average period of approximately three years.
	Restricted Stock Units—On June 6, 2014, the Company granted restricted stock units for 16,875 shares of common stock to the Company’s former Chief Financial Officer, as outlined in the Transition and Separation Letter Agreement dated February 10, 2014 between the Company and the former Chief Financial Officer (the “Transition and Separation Letter Agreement”). The restricted stock units will be paid out in shares one year from the grant date, provided that the former Chief Financial Officer substantially complies with the Post-Employment Assistance undertakings and with the Restrictive Covenants Agreements, each as defined in the Transition and Separation Letter Agreement. If the former Chief Financial Officer does not substantially comply, the restricted stock units will be forfeited as of the date of noncompliance. During the three and nine months ended September 30, 2014, the Company recorded $0.2 million and $0.3 million, respectively, of consulting expense for this restricted stock unit award, and no such expense was recorded during the three and nine months ended September 30, 2013.
	Employee Stock Purchase Plan— The ESPP and its foreign corollaries permit eligible employees to purchase shares of the Company’s common stock through accumulated payroll deductions. 400,000 shares have been allocated for the ESPP. 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.
	Stock-Based Compensation—Stock-based compensation expense 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 awards with a performance-based measure, the Company accrues stock-based compensation expense 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 operations and comprehensive loss (in thousands):
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Cost of subscription revenue	$	177	$	84	$	477	$	294
	Cost of services revenue		532		274		1,441		889
	Sales and marketing		1,868		1,055		5,335		3,130
	Research and development		1,825		815		5,156		2,550
	General and administration		1,968		1,261		6,962		3,970
	Total	$	6,370	$	3,489	$	19,371	$	10,833
	Stock-based compensation cost for the three months ended September 30, 2014 and 2013 includes $1.6 million and $1.4 million, respectively, related to stock options, and $0.1 million and $0.1 million, respectively, related to the ESPP. Stock-based compensation cost for the nine months ended September 30, 2014 and 2013 includes $4.6 million and $4.7 million, respectively, related to stock options, and $0.3 million and $0.1 million, respectively, related to the ESPP. The remaining expense for each period relates to restricted stock.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	9. INCOME TAXES
	The Company’s income tax expense was $0.2 million and $0.7 million for the three and nine months ended September 30, 2014, respectively. The effective income tax rate was (3.0)% and (2.9)% for the three and nine months ended September 30, 2014, respectively, as compared to an income tax expense of $0.1 million and $0.5 million, respectively, and an effective income tax rate of (1.8)% and (2.1)% for the three and nine months ended September 30, 2013. The increase in the income tax expense primarily relates to additional foreign income taxes.
	The Company has evaluated the positive and negative evidence bearing upon the realizability of its deferred tax assets. Management has determined that it is more likely than not that the Company will not utilize the benefits of federal and state deferred tax assets for financial reporting purposes. Accordingly, 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 assets related to Demandware E-Commerce (Shanghai) Limited, Demandware UK Limited, and Demandware Australia Pty Limited.
	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 certain state tax authorities due to the Company’s NOL carryforwards. The Company is subject to examination by various foreign jurisdictions for years after 2008. The Company believes it has adequately reserved for its uncertain tax positions; however, there is no assurance that taxing authorities will not propose adjustments that are more or less than its expected outcome. It is not expected that the amount of unrecognized tax benefits will be recognized in the next twelve months. In addition, the Company does not expect the change in uncertain tax positions to have a material impact on its financial position, results of operations or liquidity.

Goodwill_and_Purchased_Intangi

Goodwill and Purchased Intangible Assets	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Purchased Intangible Assets	'
	10. GOODWILL AND PURCHASED INTANGIBLE ASSETS
	Goodwill—Changes in the carrying amount of goodwill in the nine months ended September 30, 2014 are as follows (in thousands):
	Balance, December 31, 2013	$	—
	Additions		8,966
	Balance, September 30, 2014	$	8,966
	The addition to goodwill during fiscal year 2014 is related to the acquisition of Mainstreet in January 2014 (Note 3).
	Purchased Intangible Assets— Intangible assets acquired as of September 30, 2014 are as follows (in thousands):
		As of September 30, 2014
		Gross Carrying		Accumulated		Net Book Value
		Amount		Amortization
	Developed Technology	$	2,500	$	631	$	1,869
	Customer Relationships		300		69		231
	Trademarks		10		7		3
	Total	$	2,810	$	707	$	2,103
	The Company had no acquired intangible assets as of December 31, 2013.
	In the three and nine months ended September 30, 2014, amortization expense related to acquired intangible assets was $0.2 million and $0.7 million, respectively. The Company incurred no amortization expense related to acquired intangible assets during the three and nine months ended September 30, 2013.
	Future estimated amortization expense for acquired intangible assets as of September 30, 2014 is as follows (in thousands):
	Remainder of 2014	$	230
	2015		674
	2016		477
	2017		402
	2018		302
	Thereafter		18
	Total	$	2,103

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	11. SUBSEQUENT EVENTS
	CQuotient Acquisition— On October 9, 2014, the Company acquired 100% of the equity of CQuotient, Inc. (“CQuotient”), a cloud personalization provider, for cash consideration of approximately $21.5 million. Additional consideration of $3.4 million, payable in cash or shares of the Company’s common stock at the option of the Company, is payable to certain employees contingent upon their continued employment. This consideration will be recognized in the Company’s post-combination financial statements as compensation expense over the employment period. 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 CQuotient immediately before the acquisition date and the valuation techniques and related inputs used to measure the acquisition date fair value. During each of the three and nine months ended September 30, 2014, $0.3 million of acquisition-related costs were incurred to effect the CQuotient acquisition, which is included in the Company’s general and administrative expense. No such expenses were incurred during the three and nine months ended September 30, 2013. Comparative pro forma financial information for this acquisition has not been presented because the acquisition is not material to the Company’s consolidated results of operations.

Organization_and_Summary_of_Si1

Organization and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Basis of Presentation and Significant Accounting Policies	'
	Basis of Presentation and Significant Accounting Policies—The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) applicable to interim periods, under the rules and regulations of the United States Securities and Exchange Commission ( “SEC”), and on a basis substantially consistent with the audited consolidated financial statements of the Company as of and for the fiscal year ended December 31, 2013. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of the results of operations for the interim periods reported and of the Company’s financial condition as of the date of the interim balance sheet. The Company considers events or transactions that occur after the balance sheet date but before the financial statements are issued to provide additional information relative to certain estimates or to identify matters that require additional disclosure. Interim results are not necessarily indicative of the results for any other interim period or for the entire year.
	The condensed consolidated balance sheet at December 31, 2013 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP. The accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K filed with the SEC on March 3, 2014.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements—Effective January 1, 2014, the Company adopted Accounting Standards Update (“ASU”) 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. The adoption of this guidance did not have a material impact on the Company’s consolidated financial position, results of operations or cash flows.
	In May 2014, the Financial Accounting Standards Board issued ASU No. 2014-09, “Revenue from Contracts with Customers”. The comprehensive new standard will supersede existing revenue recognition guidance and require revenue to be recognized when promised goods or services are transferred to customers in amounts that reflect the consideration to which the Company expects to be entitled in exchange for those goods or services. The guidance will also require that certain contract costs incurred to obtain or fulfill a contract, such as sales commissions, be capitalized as an asset and amortized as revenue is recognized. Adoption of the new rules could affect the timing of both revenue recognition and the recognition of contract costs for certain transactions. The guidance permits two implementation approaches, one requiring retrospective application of the new standard with restatement of prior years and one requiring prospective application of the new standard with disclosure of results under old standards. The new standard is effective for reporting periods beginning after December 15, 2016 and early adoption is not permitted. For the Company, the new standard will be effective January 1, 2017. The Company is currently evaluating the impact of adoption and the implementation approach to be used.

Net_Loss_Per_Share_Tables

Net Loss Per Share (Tables)	9 Months Ended
	Sep. 30, 2014
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 anti-dilutive impact (in thousands):
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Options to purchase common stock		2,757		3,468		2,854		3,829
	Unvested restricted stock		1,211		915		1,178		861
	Employee Stock Purchase Plan		20		15		14		5

Business_Combination_Tables

Business Combination (Tables)	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Schedule of Assets Acquired and Obligations Assumed	'
	The allocation of the Mainstreet consideration to the assets acquired and obligations assumed was as follows (in thousands):
	Cash	$	261
	Accounts receivable		511
	Developed technology		2,500
	Customer relationships		300
	Trademarks		10
	Goodwill		8,966
	Other assets / liabilities, net		(151	)
	Total purchase price	$	12,397

Cash_Equivalents_and_ShortTerm1

Cash Equivalents and Short-Term Investments (Tables)	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014 is as follows (in thousands):
		Amortized		Unrealized		Unrealized			Fair
		Cost		Gains		Losses			Value
	Cash Equivalents:
	Money market funds	$	138,405	$	—	$	—		$	138,405
	Certificates of deposit		498		—		—			498
	Municipal securities		3,000		—		—			3,000
		$	141,903	$	—	$	—		$	141,903
	Short-Term Investments:
	U.S. government agency bonds	$	22,417	$	2	$	—		$	22,419
	Corporate bonds		9,435		—		(2	)		9,433
	International government bonds		9,068		1		—			9,069
	Municipal securities		25,365		4		(5	)		25,364
	Certificates of deposit		32,535		1		(3	)		32,533
		$	98,820	$	8	$	(10	)	$	98,818
	A summary of the Company’s cash equivalents and short-term investments at December 31, 2013 is as follows (in thousands):
		Amortized		Unrealized		Unrealized			Fair
		Cost		Gains		Losses			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

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014 and December 31, 2013 (in thousands):
				Fair Value Measurements Using
		Amounts		Quoted		Significant		Significant
		at Fair		Prices in		Other		Unobservable
		Value		Active		Observable		Inputs
				Markets		Inputs		(Level 3)
				for		(Level 2)
				Identical
				Assets
				(Level 1)
	At September 30, 2014
	Assets—Cash Equivalents:
	Money market funds	$	138,405	$	138,405	$	—	$	—
	Certificates of deposit		498		—		498		—
	Municipal securities		3,000		—		3,000		—
	Assets—Short-Term Investments:
	U.S. government agency bonds	$	22,419	$	—	$	22,419	$	—
	Corporate bonds and commercial paper		9,433		—		9,433		—
	International government bonds		9,069		—		9,069		—
	Municipal securities		25,364		—		25,364		—
	Certificates of deposit		32,533		—		32,533		—
	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		—

StockBased_Awards_Tables

Stock-Based Awards (Tables)	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Summary of Stock Options Outstanding	'
	The following table summarizes information related to stock options outstanding as of September 30, 2014 (in thousands, except per share and term information):
		Shares		Weighted-		Weighted-		Aggregate
				Average		Average		Intrinsic
				Exercise		Remaining		Value
				Price		Contractual
				(per Share)		Life
						(in Years)
	Exercisable—September 30, 2014		1,955	$	6.78		5.57	$	86,309
	Options vested and expected to vest—September 30, 2014		2,687	$	15.32		6.28	$	98,057
Stock-Based Compensation Expense	'
	The following table presents stock-based compensation expense included in the Company’s consolidated statements of operations and comprehensive loss (in thousands):
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Cost of subscription revenue	$	177	$	84	$	477	$	294
	Cost of services revenue		532		274		1,441		889
	Sales and marketing		1,868		1,055		5,335		3,130
	Research and development		1,825		815		5,156		2,550
	General and administration		1,968		1,261		6,962		3,970
	Total	$	6,370	$	3,489	$	19,371	$	10,833

Goodwill_and_Purchased_Intangi1

Goodwill and Purchased Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Summary of Changes in Carrying Amount of Goodwill	'
	Goodwill—Changes in the carrying amount of goodwill in the nine months ended September 30, 2014 are as follows (in thousands):
	Balance, December 31, 2013	$	—
	Additions		8,966
	Balance, September 30, 2014	$	8,966
Schedule of Intangible Assets Acquired	'
	Intangible assets acquired as of September 30, 2014 are as follows (in thousands):
		As of September 30, 2014
		Gross Carrying		Accumulated		Net Book Value
		Amount		Amortization
	Developed Technology	$	2,500	$	631	$	1,869
	Customer Relationships		300		69		231
	Trademarks		10		7		3
	Total	$	2,810	$	707	$	2,103
Schedule of Future Estimated Amortization Expense for Acquired Intangible Assets	'
	Future estimated amortization expense for acquired intangible assets as of September 30, 2014 is as follows (in thousands):
	Remainder of 2014	$	230
	2015		674
	2016		477
	2017		402
	2018		302
	Thereafter		18
	Total	$	2,103

Organization_and_Summary_of_Si2

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)	1 Months Ended		0 Months Ended	1 Months Ended
	Dec. 31, 2013	Nov. 30, 2013	Sep. 30, 2014	Dec. 31, 2013
	USD ($)	USD ($)	Demandware K.K Joint Venture [Member]	Underwriter [Member]
			JPY (¥)
Subsidiary, Sale of Stock [Line Items]	'	'	'	'
Contribution to joint venture	'	'	¥ 300,000,000	'
Percentage of contribution to joint venture	'	'	75.00%	'
Public Offerings of common stock	'	3,310,098	'	496,515
Common stock sold by certain shareholders	'	810,098	'	'
Public offering price per share	$57	$57	'	'
Offering expenses	500,000	'	'	'
Proceeds from public offerings of common stock	163,100,000	'	'	'
Proceeds from sale of common stock by the selling shareholders	$0	'	'	'

Net_Loss_Per_Share_Shares_Excl

Net Loss Per Share - Shares Excluded from Computation of Diluted Net loss Per Share Attributable to Common Stockholders (Detail)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Stock Option [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive securities	2,757	3,468	2,854	3,829
Restricted Stock Awards [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive securities	1,211	915	1,178	861
Employee Stock Purchase Plan [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive securities	20	15	14	5

Business_Combination_Additiona

Business Combination - Additional Information (Detail) (Mainstreet Commerce LC [Member], USD $)	0 Months Ended	3 Months Ended	9 Months Ended
	Jan. 22, 2014	Sep. 30, 2014	Sep. 30, 2014	Jan. 22, 2014
Business Acquisition [Line Items]	'	'	'	'
Acquisition date	'	'	22-Jan-14	'
Percentage of equity acquired	'	'	'	100.00%
Business acquisition, cash consideration	$19,400,000	'	'	'
Amount held in escrow	'	'	'	10,000,000
Amount in escrow is reserved for payments to employees for post combination employment services	7,000,000	'	'	'
Business acquisition, escrow withheld as protection against certain losses	'	'	'	3,000,000
Purchase price of business acquisition	'	12,397,000	12,397,000	12,400,000
Transaction costs in connection with acquisition	'	$500,000	$100,000	'
Customer Relationships [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Intangible assets, amortization period	'	'	'5 years	'
Trademarks [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Intangible assets, amortization period	'	'	'1 year	'
Developed Technology [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Intangible assets, amortization period	'	'	'5 years	'

Business_Combination_Schedule_

Business Combination - Schedule of Assets Acquired and Obligations Assumed (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Jan. 22, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014
In Thousands, unless otherwise specified			Mainstreet Commerce LC [Member]	Mainstreet Commerce LC [Member]	Mainstreet Commerce LC [Member]	Mainstreet Commerce LC [Member]	Mainstreet Commerce LC [Member]
					Developed Technology [Member]	Customer Relationships [Member]	Trademarks [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'
Cash	'	'	$261	'	'	'	'
Accounts receivable	'	'	511	'	'	'	'
Finite lived intangible assets	'	'	'	'	2,500	300	10
Goodwill	8,966	'	8,966	'	'	'	'
Other assets / liabilities, net	'	'	-151	'	'	'	'
Total purchase price	'	'	$12,397	$12,400	'	'	'

Cash_Equivalents_and_ShortTerm2

Cash Equivalents and Short-Term Investments - Cash Equivalents and Available-for-Sale Investments (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Cash Equivalents [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Cash Equivalents - Amortized Cost	$141,903	$229,128
Unrealized Gains	'	'
Unrealized Losses	'	'
Cash Equivalents - Fair Value	141,903	229,128
Cash Equivalents [Member] | Money Market Funds [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Cash Equivalents - Amortized Cost	138,405	226,130
Unrealized Gains	'	'
Unrealized Losses	'	'
Cash Equivalents - Fair Value	138,405	226,130
Cash Equivalents [Member] | Certificates of Deposit [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Cash Equivalents - Amortized Cost	498	998
Unrealized Gains	'	'
Unrealized Losses	'	'
Cash Equivalents - Fair Value	498	998
Cash Equivalents [Member] | Municipal Securities [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Cash Equivalents - Amortized Cost	3,000	2,000
Unrealized Gains	'	'
Unrealized Losses	'	'
Cash Equivalents - Fair Value	3,000	2,000
Short-Term Investments [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Short-Term Investments - Amortized Cost	98,820	37,131
Unrealized Gains	8	6
Unrealized Losses	-10	-4
Short-Term Investments - Fair Value	98,818	37,133
Short-Term Investments [Member] | Certificates of Deposit [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Short-Term Investments - Amortized Cost	32,535	9,612
Unrealized Gains	1	1
Unrealized Losses	-3	-1
Short-Term Investments - Fair Value	32,533	9,612
Short-Term Investments [Member] | Municipal Securities [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Short-Term Investments - Amortized Cost	25,365	19,701
Unrealized Gains	4	4
Unrealized Losses	-5	-2
Short-Term Investments - Fair Value	25,364	19,703
Short-Term Investments [Member] | U.S. Government Agency Bonds [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Short-Term Investments - Amortized Cost	22,417	4,500
Unrealized Gains	2	1
Short-Term Investments - Fair Value	22,419	4,501
Short-Term Investments [Member] | Corporate Bonds and Commercial Paper [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Short-Term Investments - Amortized Cost	'	3,318
Unrealized Losses	'	-1
Short-Term Investments - Fair Value	'	3,317
Short-Term Investments [Member] | Corporate Bonds	'	'
Cash and Cash Equivalents [Line Items]	'	'
Short-Term Investments - Amortized Cost	9,435	'
Unrealized Losses	-2	'
Short-Term Investments - Fair Value	9,433	'
Short-Term Investments [Member] | International Government Bonds [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Short-Term Investments - Amortized Cost	9,068	'
Unrealized Gains	1	'
Short-Term Investments - Fair Value	$9,069	'

Cash_Equivalents_and_ShortTerm3

Cash Equivalents and Short-Term Investments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014
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 $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	$98,818	$37,133
Cash Equivalents [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	141,903	229,128
Cash Equivalents [Member] | Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	138,405	226,130
Cash Equivalents [Member] | Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	498	998
Cash Equivalents [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Cash Equivalents	3,000	2,000
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	32,533	9,612
Short-Term Investments [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	25,364	19,703
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	22,419	4,501
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	9,433	3,317
Short-Term Investments [Member] | International Government Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	9,069	'
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	138,405	226,130
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	498	998
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	3,000	2,000
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	32,533	9,612
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	25,364	19,703
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	22,419	4,501
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	9,433	3,317
Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] | Short-Term Investments [Member] | International Government Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets-Short-Term Investments	$9,069	'

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)

Sep. 30, 2014

Dec. 31, 2013

Jun. 30, 2013

Jun. 30, 2012

Jun. 30, 2011

Apr. 30, 2010

Sep. 30, 2014

30-May-09

31-May-13

31-May-12

Sep. 30, 2014

Dec. 31, 2013

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 Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding borrowings under the Loan

$0

$3,300,000

'

'

'

'

'

$2,000,000

'

'

$0

$900,000

Increase in available equipment line of credit borrowings

'

'

3,000,000

3,000,000

4,000,000

4,000,000

'

'

'

'

'

'

Initial drawdown of loan due in equal monthly payments

'

'

'

'

'

'

'36 equal months

'

'

'

'

'

Annual interest rate

'

'

'

'

'

'

3.75%

'

'

'

5.40%

'

Available borrowings under the Loan for eligible equipment purchases

0

'

'

'

'

'

'

'

'

'

'

'

Purchase of software license

'

'

'

'

'

'

'

'

'

1,800,000

'

'

Frequency of payments

'

'

'

'

'

'

'

'

'

'

'12 equal quarterly payments

'

Agreement expiration date

'

'

'

'

'

'

'

'

'

'

1-Apr-15

'

Increased financed amount

'

'

'

'

'

'

'

'

$600,000

'

'

'

StockBased_Awards_Additional_I

Stock-Based Awards - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended
	Jun. 06, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Consulting expense	'	'	'	$273,000	'
Stock-based compensation cost	'	6,370,000	3,489,000	19,371,000	10,833,000
Stock Option [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Share-based compensation vesting period	'	'	'	'4 years	'
Stock options grant expiration period	'	'	'	'10 years	'
Unrecognized compensation expense	'	14,100,000	'	14,100,000	'
Weighted average period	'	'	'	'3 years	'
Stock-based compensation cost	'	1,600,000	1,400,000	4,600,000	4,700,000
Restricted Stock Awards [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Weighted average period	'	'	'	'3 years	'
Unrecognized compensation expense	'	50,300,000	'	50,300,000	'
Restricted Stock Awards [Member] | Minimum [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Share-based compensation vesting period	'	'	'	'2 years	'
Restricted Stock Awards [Member] | Maximum [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]	'	'	'	'	'
Allocated shares, employees to purchase	'	400,000	'	400,000	'
Percentage of purchase price of stock	'	'	'	85.00%	'
Stock-based compensation cost	'	100,000	100,000	300,000	100,000
Restricted Stock Units (RSUs) [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Common stock shares granted	16,875	'	'	'	'
Consulting expense	'	$200,000	$0	$300,000	$0

StockBased_Awards_Summary_of_S

Stock-Based Awards - Summary of Stock Options Outstanding (Detail) (USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Exercisable Shares-September 30, 2014	1,955
Options vested and expected to vest, Shares-September 30, 2014	2,687
Exercisable Weighted-Average Exercise Price (per share)-September 30, 2014	$6.78
Options vested and expected to vest, Weighted-Average Exercise Price (per share)-September 30, 2014	$15.32
Exercisable, Weighted-Average Remaining Contractual Life (in Years)-September 30, 2014	'5 years 6 months 26 days
Options vested and expected to vest, Weighted-Average Remaining Contractual Life (in Years)-September 30, 2014	'6 years 3 months 11 days
Exercisable, Aggregate Intrinsic Value-September 30, 2014	$86,309
Options vested and expected to vest, Aggregate Intrinsic Value-September 30, 2014	$98,057

StockBased_Awards_StockBased_C

Stock-Based Awards - Stock-Based Compensation Expense (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]	'	'	'	'
Stock-based compensation cost	$6,370	$3,489	$19,371	$10,833
Cost of Subscription Revenue [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]	'	'	'	'
Stock-based compensation cost	177	84	477	294
Cost of Services Revenue [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]	'	'	'	'
Stock-based compensation cost	532	274	1,441	889
Sales and Marketing [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]	'	'	'	'
Stock-based compensation cost	1,868	1,055	5,335	3,130
Research and Development [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]	'	'	'	'
Stock-based compensation cost	1,825	815	5,156	2,550
General and Administration [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]	'	'	'	'
Stock-based compensation cost	$1,968	$1,261	$6,962	$3,970

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Income tax expense	$199	$110	$691	$474
Effective income tax rate	-3.00%	-1.80%	-2.90%	-2.10%

Goodwill_and_Purchased_Intangi2

Goodwill and Purchased Intangible Assets - Summary of Changes in Carrying Amount of Goodwill (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Balance, December 31, 2013	'
Additions	8,966
Balance, September 30, 2014	$8,966

Goodwill_and_Purchased_Intangi3

Goodwill and Purchased Intangible Assets - Schedule of Intangible Assets Acquired (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$2,810	'
Accumulated Amortization	707	'
Net Book Value	2,103	0
Developed Technology [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	2,500	'
Accumulated Amortization	631	'
Net Book Value	1,869	'
Customer Relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	300	'
Accumulated Amortization	69	'
Net Book Value	231	'
Trademarks [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	10	'
Accumulated Amortization	7	'
Net Book Value	$3	'

Goodwill_and_Purchased_Intangi4

Goodwill and Purchased Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'	'	'	'	'
Acquired intangible assets	$2,103,000	'	$2,103,000	'	$0
Intangible assets, amortization expense	$200,000	$0	$700,000	$0	'

Goodwill_and_Purchased_Intangi5

Goodwill and Purchased Intangible Assets - Schedule of Future Estimated Amortization Expense for Acquired Intangible Assets (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
Remainder of 2014	$230	'
2015	674	'
2016	477	'
2017	402	'
2018	302	'
Thereafter	18	'
Net Book Value	$2,103	$0

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (CQuotient Acquisition [Member], USD $)	3 Months Ended		9 Months Ended		0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Oct. 09, 2014
	General and Administration [Member]	General and Administration [Member]	General and Administration [Member]	General and Administration [Member]	Subsequent Events [Member]
Subsequent Event [Line Items]	'	'	'	'	'
Acquisition date	'	'	'	'	9-Oct-14
Percentage of interest acquired	'	'	'	'	100.00%
Business acquisition, cash consideration	'	'	'	'	$21,500,000
Additional consideration	'	'	'	'	3,400,000
Transaction costs in connection with acquisition	$300,000	$0	$300,000	$0	'