Constant Contact (CTCT) 10-Q 29 Jul 15 2015 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 27, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Trading Symbol	CTCT
Entity Registrant Name	Constant Contact, Inc.
Entity Central Index Key	1,405,277
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		32,188,446

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 123,838	$ 104,301
Marketable securities	56,861	58,321
Accounts receivable, net of allowance for doubtful accounts	358	265
Prepaid expenses and other current assets	12,869	10,723
Total current assets	193,926	173,610
Property and equipment, net	48,440	43,739
Restricted cash	1,300	1,300
Goodwill	95,505	95,505
Acquired intangible assets, net	1,249	2,160
Deferred taxes	6,271	4,658
Other assets	2,563	1,893
Total assets	349,254	322,865
Current liabilities
Accounts payable	9,974	4,703
Accrued expenses	14,563	12,230
Deferred revenue	40,092	37,838
Total current liabilities	64,629	54,771
Other long-term liabilities	3,895	3,783
Total liabilities	$ 68,524	$ 58,554
Commitments and contingencies (Note 7)
Stockholders' equity
Preferred stock; $0.01 par value; 5,000,000 shares authorized; no shares issued or outstanding at June 30, 2015 and December 31, 2014
Common stock; $0.01 par value; 100,000,000 shares authorized; 32,196,054 and 31,908,622 shares issued and outstanding at June 30, 2015 and December 31, 2014, respectively	$ 322	$ 319
Additional paid-in capital	258,617	249,599
Accumulated other comprehensive income (loss)	12	(10)
Retained earnings	21,779	14,403
Total stockholders' equity	280,730	264,311
Total liabilities and stockholders' equity	$ 349,254	$ 322,865

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	32,196,054	31,908,622
Common stock, shares outstanding	32,196,054	31,908,622

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Revenue	$ 91,531	$ 81,256	$ 181,948	$ 160,130
Cost of revenue	24,462	22,100	48,893	43,827
Gross profit	67,069	59,156	133,055	116,303
Operating expenses
Research and development	14,129	12,850	27,954	25,924
Sales and marketing	35,440	33,113	71,508	65,913
General and administrative	11,452	10,186	23,245	20,306
Total operating expenses	61,021	56,149	122,707	112,143
Income from operations	6,048	3,007	10,348	4,160
Interest income and other income (expense), net	168	25	111	48
Income before income taxes	6,216	3,032	10,459	4,208
Income tax expense	(2,390)	(1,011)	(3,083)	(1,339)
Net income	$ 3,826	$ 2,021	$ 7,376	$ 2,869
Net income per share:
Basic	$ 0.12	$ 0.06	$ 0.23	$ 0.09
Diluted	$ 0.11	$ 0.06	$ 0.22	$ 0.09
Weighted average shares outstanding used in computing per share amounts:
Basic	32,132	31,484	32,112	31,387
Diluted	33,290	32,620	33,473	32,532

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 3,826	$ 2,021	$ 7,376	$ 2,869
Other comprehensive income:
Net unrealized gains (losses) on marketable securities, net of tax	(7)	6	18	3
Reclassification adjustment for realized gains on marketable securities included in net income		(1)		(1)
Translation adjustment	13	3	4	4
Total other comprehensive income	6	8	22	6
Comprehensive income	$ 3,832	$ 2,029	$ 7,398	$ 2,875

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities
Net income	$ 7,376	$ 2,869
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,215	11,807
Amortization of premium on investments	217	107
Stock-based compensation expense	8,926	8,324
Provision for bad debts	3	10
Gain on sales of marketable securities		(1)
Deferred income taxes	(1,566)
Income tax benefit from the exercise of stock options	(2,910)	(605)
Taxes paid related to net share settlement of restricted stock units	(1,257)	(1,841)
Changes in operating assets and liabilities:
Accounts receivable	(96)	13
Prepaid expenses and other current assets	686	(1,224)
Other assets	(670)	185
Accounts payable	4,860	685
Accrued expenses	2,663	814
Deferred revenue	2,254	1,401
Other long-term liabilities	112	416
Net cash provided by operating activities	32,813	22,960
Cash flows from investing activities
Purchases of marketable securities	(26,106)	(25,759)
Proceeds from maturities of marketable securities	27,362	13,265
Proceeds from sales of marketable securities		633
Acquisition of property and equipment, including costs capitalized for development of internal use software	(15,781)	(14,055)
Net cash used in investing activities	(14,525)	(25,916)
Cash flows from financing activities
Proceeds from issuance of common stock pursuant to the exercise of stock options	10,912	6,616
Income tax benefit from the exercise of stock options	2,910	605
Proceeds from issuance of common stock pursuant to employee stock purchase plan	1,063	831
Repurchase of common stock	(13,640)
Net cash provided by financing activities	1,245	8,052
Effects of exchange rates on cash and cash equivalents	4	4
Net increase in cash and cash equivalents	19,537	5,100
Cash and cash equivalents, beginning of period	104,301	82,478
Cash and cash equivalents, end of period	123,838	87,578
Supplemental disclosure of noncash investing and financing activities:
Capitalization of stock-based compensation	144	$ 100
Acquisition of property and equipment included in accounts payable and accrued expenses	$ 2,003

Nature of the Business

Nature of the Business	6 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of the Business	1. Nature of the Business Constant Contact, Inc. (the “Company”) was incorporated as a Massachusetts corporation in 1995 and was reincorporated in the State of Delaware in 2000. The Company is a leading provider of online marketing tools that are designed for small organizations, including small businesses, associations and non-profits. The Company seeks to help customers succeed by creating and growing their customer and member relationships through easy-to-use products combined with education, support, KnowHow ® ™ ®

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation The accompanying condensed consolidated financial statements include those of the Company and its subsidiaries, after elimination of all intercompany accounts and transactions. The accompanying condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The condensed consolidated balance sheet at December 31, 2014 was derived from audited financial statements, but does not include all disclosures required by GAAP. The accompanying unaudited condensed consolidated financial statements as of June 30, 2015 and for the three and six months ended June 30, 2015 and 2014 have been prepared by the Company, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. However, the Company believes that the disclosures are adequate to make the information presented not misleading. These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto for the year ended December 31, 2014 included in the Company’s Annual Report on Form 10-K, File Number 001-33707, In the opinion of management, all adjustments, consisting only of normal recurring adjustments necessary for a fair statement of the Company’s consolidated financial position as of June 30, 2015 and consolidated results of operations for the three and six months ended June 30, 2015 and 2014 and cash flows for the six months ended June 30, 2015 and 2014, have been made. The results of operations for the three and six months ended June 30, 2015 are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2015. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. On an ongoing basis, management evaluates these estimates, judgments and assumptions, including those related to revenue recognition, stock-based compensation, goodwill and acquired intangible assets, capitalization of software and website development costs and income taxes. The Company bases these estimates on historical and anticipated results and trends and on various other assumptions that the Company believes are reasonable under the circumstances, including assumptions as to future events. These estimates form the basis for making judgments about the carrying values of assets and liabilities and recorded revenue and expenses that are not readily apparent from other sources. Actual results could differ from these estimates. Marketable Securities The Company’s marketable securities are classified as available-for-sale and are carried at fair value with the unrealized gains and losses reported as a component of accumulated other comprehensive income (loss) in stockholders’ equity. Realized gains and losses and declines in value judged to be other than temporary are included as a component of interest and other income (expense) based on the specific identification method. At June 30, 2015, marketable securities by security type consisted of: Amortized Gross Gross Estimated United States Treasury Notes $ 7,805 $ 4 $ — $ 7,809 Corporate and Agency Bonds 49,051 11 (10 ) 49,052 Total $ 56,856 $ 15 $ (10 ) $ 56,861 At June 30, 2015, marketable securities consisted of investments that mature within one year with the exception of securities with a fair value of $18,317, which have maturities within two years. At December 31, 2014, marketable securities by security type consisted of: Amortized Gross Gross Estimated United States Treasury Notes $ 20,000 $ 6 $ — $ 20,006 Corporate and Agency Bonds 37,330 2 (16 ) 37,316 Commercial Paper 999 — — 999 Total $ 58,329 $ 8 $ (16 ) $ 58,321 Fair Value of Financial Instruments Certain assets and liabilities are carried at fair value under GAAP. Fair value is defined 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 on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. A fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last is considered unobservable, is used to measure fair value: • Level 1 — Quoted prices in active markets for identical assets or liabilities. • Level 2 — Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The following tables present the Company’s fair value hierarchy for its investments, which are measured at fair value on a recurring basis as of June 30, 2015 and December 31, 2014: Fair Value Measurements at June 30, 2015 Using Level 1 Level 2 Level 3 Total Financial Assets: Money Market Instruments $ 7,363 $ — $ — $ 7,363 United States Treasury Notes 7,809 — — 7,809 Corporate and Agency Bonds — 49,052 — 49,052 Total $ 15,172 $ 49,052 $ — $ 64,224 Fair Value Measurements at December 31, 2014 Using Level 1 Level 2 Level 3 Total Financial Assets: Money Market Instruments $ 5,885 $ — $ — $ 5,885 United States Treasury Notes 20,006 — — 20,006 Corporate and Agency Bonds — 37,316 — 37,316 Commercial Paper — 999 — 999 Total $ 25,891 $ 38,315 $ — $ 64,206 Net Income Per Share Basic net income per share is computed by dividing net income by the weighted average number of unrestricted common shares outstanding for the period. Diluted net income per share is computed by dividing net income by the sum of the weighted average number of unrestricted common shares outstanding during the period and the weighted average number of potential common shares from the assumed exercise of stock options and the vesting of shares of restricted stock units using the “treasury stock” method when the effect is not anti-dilutive. The following is a summary of the shares used in computing diluted net income per share: Three months ended Six months ended 2015 2014 2015 2014 (In thousands) Weighted average shares used in calculating basic net income per share 32,132 31,484 32,112 31,387 Stock options 1,026 1,002 1,210 1,016 Warrants — 1 — 1 Restricted stock units 132 133 151 128 Shares used in computing diluted net income per share 33,290 32,620 33,473 32,532 The following common stock equivalents were excluded from the computation of diluted net income per share because they had an anti-dilutive impact as the proceeds under the treasury stock method were in excess of the average fair market value for the period: Three months ended Six months ended 2015 2014 2015 2014 (In thousands) Options to purchase common stock 598 1,488 435 1,261 Restricted stock units 373 276 227 272 Total 971 1,764 662 1,533 Recently Issued Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (the “FASB”) issued new guidance, Revenue from Contracts with Customers, In August 2014, the FASB issued new guidance, Presentation of Financial Statements — Going Concern. In April 2015, the FASB issued new guidance, Intangibles—Goodwill and Other—Internal-Use Software: Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement

Goodwill and Acquired Intangibl

Goodwill and Acquired Intangible Assets	6 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Acquired Intangible Assets	3. Goodwill and Acquired Intangible Assets The carrying amount of goodwill was $95,505 at June 30, 2015 and December 31, 2014. Goodwill is not amortized, but instead is reviewed for impairment at least annually in the fourth quarter or more frequently when events and circumstances occur indicating that the recorded goodwill may be impaired. Intangible assets consist of the following: Estimated June 30, 2015 December 31, 2014 Gross Accumulated Net Carrying Gross Accumulated Net Carrying Developed technology 3 years $ 4,357 $ 3,907 $ 450 $ 4,357 $ 3,465 $ 892 Customer relationships 3.75 years 3,315 3,007 308 3,315 2,666 649 Publisher relationships 5 years 710 438 272 710 367 343 Trade name 5 years 570 351 219 570 294 276 $ 8,952 $ 7,703 $ 1,249 $ 8,952 $ 6,792 $ 2,160 The Company amortizes intangible assets over the estimated useful lives noted above. Amortization of developed technology and publisher relationships assets is on a straight-line basis as the pattern of consumption of the economic benefits of the intangible assets cannot be reliably determined. The Company also amortizes the trade name asset over its estimated useful life on a straight-line basis as the straight-line basis is not materially different than the pattern of consumption of economic benefit basis. Customer relationships are amortized over their useful life based on the pattern of consumption of economic benefit of the asset. Amortization commences once the asset has been placed in service. Amortization expense for intangible assets was $427 and $554 for the three months ended June 30, 2015 and 2014, respectively, and $911 and $1,121 for the six months ended June 30, 2015 and 2014, respectively. Amortization relating to developed technology and publisher relationships is recorded within cost of revenue and amortization of customer relationships and trade name is recorded within sales and marketing expense. Future estimated amortization expense for intangible assets as of June 30, 2015 is as follows: Remainder of 2015 $ 672 2016 470 2017 107 Total $ 1,249

Stockholders' Equity and Stock-

Stockholders' Equity and Stock-Based Compensation	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Stockholders' Equity and Stock-Based Compensation	4. Stockholders’ Equity and Stock-Based Compensation Stock Repurchase Program In the second quarter of 2014, the Board of Directors authorized the repurchase of up to $30,000 of its common stock through July 31, 2015. Under the authorization, the Company could repurchase shares in the open market, which included the use of 10b5-1 trading plans, or through privately negotiated transactions. The timing and amount of repurchases depended upon several factors, including market and business conditions. The Company funded repurchases from its cash and cash equivalents. During the three months ended June 30, 2015, the Company repurchased 156,120 shares at an average price of $29.72 per share. These shares were retired and accounted for as a reduction to stockholders’ equity in the Company’s condensed consolidated balance sheet. As of June 30, 2015, this stock repurchase program has ended. In the second quarter of 2015, the Board of Directors authorized the additional repurchase of up to $50,000 of the Company’s common stock through July 1, 2016. Under the authorization, the Company can repurchase shares in the open market, which may include the use of 10b5-1 trading plans, or through privately negotiated transactions. The timing and amount of repurchases, if any, will depend upon several factors, including market and business conditions. Share repurchases may be suspended or discontinued at any time. The Company intends to fund repurchases from its cash and cash equivalents. No shares have been repurchased under this program as of June 30, 2015. Stock-Based Compensation Expense The Company grants stock-based awards under its existing 2011 Stock Incentive Plan and its 2007 Employee Stock Purchase Plan. The Company also has outstanding stock-based awards under its 1999 Stock Option/Stock Issuance Plan, its 2007 Stock Incentive Plan and its 2012 Inducement Award Plan but is no longer granting awards under these plans. As of June 30, 2015, 1,220,997 shares of common stock are available for issuance under the 2011 Stock Incentive Plan. As of June 30, 2015, 268,549 shares of common stock are available for issuance to participating employees under the 2007 Employee Stock Purchase Plan. The Company applies the fair value recognition provisions for all stock-based awards granted or modified in accordance with authoritative guidance. Under this guidance the Company records compensation costs over the requisite service period of the award based on the grant-date fair value. The straight-line method is applied to all grants with service conditions, while the graded vesting method is applied to all grants with both service and performance conditions. The Company recognized stock-based compensation expense on all awards in cost of revenue and operating expense categories as follows: Three months ended Six months ended 2015 2014 2015 2014 Cost of revenue $ 558 $ 506 $ 1,057 $ 948 Research and development 909 783 1,776 1,803 Sales and marketing 1,368 1,578 2,559 2,610 General and administrative 1,787 1,543 3,534 2,963 $ 4,622 $ 4,410 $ 8,926 $ 8,324 Additionally, the Company capitalized $76 and $50 of stock-based compensation related to the development of internal-use software for the three months ended June 30, 2015 and 2014, respectively, and $144 and $100 of stock-based compensation related to the development of internal-use software for the six months ended June 30, 2015 and 2014, respectively.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	5. Income Taxes For the three and six months ended June 30, 2015 and 2014, the Company recorded income tax expense related to federal, state, and to a lesser extent, foreign tax obligations. The Company’s effective tax rate may vary from period to period based on changes in estimated taxable income or loss, changes to federal, state or foreign tax laws, deductibility of certain costs and expenses, and as a result of acquisitions. The Company’s estimated effective tax rate for 2015 and 2014, which has been applied to the Company’s income before income taxes for the three and six months ended June 30, 2015 and 2014, varies from the statutory rate primarily due to state taxes and non-deductible stock-based compensation expense, that increases the effective tax rate, partially offset by state research and development credits that decrease the effective tax rate. The federal research and development credit has not yet been enacted for 2015 and had not yet been enacted in the first half of 2014 and therefore was not included in the Company’s estimated effective tax rate for either 2015 or 2014. The income tax expense for 2015 and 2014 was further reduced by the impact of disqualifying dispositions of incentive stock options during the periods. The Company had net deferred tax assets of $6,443 at December 31, 2014, which increased to $8,009 at June 30, 2015. The Company has not recorded any amounts for unrecognized tax benefits as of June 30, 2015 or December 31, 2014. As of June 30, 2015 and December 31, 2014, the Company had no accrued interest or tax penalties recorded.

Accrued Expenses

Accrued Expenses	6 Months Ended
	Jun. 30, 2015
Payables and Accruals [Abstract]
Accrued Expenses	6. Accrued Expenses June 30, December 31, Payroll and payroll-related $ 4,623 $ 4,430 Licensed software and maintenance 1,197 1,197 Marketing programs 2,102 490 Other accrued expenses 6,641 6,113 $ 14,563 $ 12,230

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	7. Commitments and Contingencies Office Leases The Company has a lease for its headquarters space in Waltham, Massachusetts (the “Lease”) that is effective through September 2022 with one ten-year extension option. The Lease includes space the Company is currently occupying as well as space that will be made available at various points in time during the term. The Company leases office space for a sales and support office in Colorado under a lease agreement effective through April 2019 with three three-year extension options. The Company also leases small amounts of general office space in Florida, New York, California and the United Kingdom under lease agreements that expire at various dates through 2018. Lease incentives, payment escalations and rent holidays specified in the lease agreements are accrued or deferred as appropriate such that rent expense per square foot is recognized on a straight-line basis over the terms of occupancy. At June 30, 2015 and December 31, 2014, the Company had both prepaid rent and accrued rent balances related to its office leases. The prepaid rent balance was $49 as of June 30, 2015, of which $14 was included in prepaid expenses and other current assets and $35 was included in other assets. The accrued rent balance was $4,568 as of June 30, 2015, of which $777 was included in accrued expenses and $3,791 was included in other long-term liabilities. The prepaid rent balance was $51 at December 31, 2014, of which $3 was included in prepaid expenses and other current assets and $48 was included in other assets. The accrued rent balance was $4,232 at December 31, 2014, of which $577 was included in accrued expenses and $3,655 was included in other long-term liabilities. As of June 30, 2015, future minimum lease payments under non-cancelable office leases are as follows: Remainder of 2015 $ 4,724 2016 9,913 2017 9,798 2018 9,396 2019 8,284 Thereafter 21,891 64,006 Less: Sublease income 573 $ 63,433 Total rent expense under office leases was $2,337 and $2,262 for the three months ended June 30, 2015 and 2014, respectively, and $4,746 and $4,582 for the six months ended June 30, 2015 and 2014, respectively. Total rent expense for the three and six months ended June 30, 2015 is net of sublease income of $47 and $94, respectively. Third-Party Hosting Agreements The Company has agreements with two affiliated vendors to provide specialized space and equipment and related services from which the Company hosts its software applications. Payment escalations and rent holidays specified in these agreements are accrued or deferred as appropriate such that rent expense per square foot is recognized on a straight-line basis over the terms of occupancy. As of June 30, 2015 and December 31, 2014, the Company had both prepaid rent and accrued rent balances related to these agreements. As of June 30, 2015, the Company had prepaid rent of $357, of which $250 was included in prepaid expenses and other current assets and $107 was included in other assets. Of the accrued rent balance of $160, $57 was included in accrued expenses and $103 was included in other long-term liabilities. At December 31, 2014, the Company had prepaid rent of $501, of which $295 was included in prepaid expenses and other current assets and $206 was included in other assets. The accrued rent balance was $172 of which $38 was included in accrued expense and other current liabilities and $134 was included in other long-term liabilities. The agreements include payment commitments that expire at various dates through 2017. As of June 30, 2015, future minimum payments under the agreements are as follows: Remainder of 2015 $ 1,978 2016 4,049 2017 775 Total $ 6,802 Total rent expense under hosting agreements was $1,111 and $1,043 for the three months ended June 30, 2015 and 2014, respectively, and $2,216 and $2,106 for the six months ended June 30, 2015 and 2014, respectively. Vendor Commitments As of June 30, 2015, the Company had issued both cancellable and non-cancellable purchase orders to various vendors and entered into contractual commitments with various vendors totaling $27,389 related to marketing programs and other non-marketing goods and services to be delivered principally over the next twelve months. Letters of Credit and Restricted Cash As of June 30, 2015 and December 31, 2014, the Company maintained a letter of credit totaling $1,300 for the benefit of the landlord of the Lease. The landlord can draw against the letter of credit in the event of default by the Company. The Company was required to maintain a cash balance of at least $1,300 as of June 30, 2015 and December 31, 2014 to secure the letter of credit. These amounts were classified as restricted cash in the balance sheet at June 30, 2015 and December 31, 2014. Indemnification Obligations The Company enters into standard indemnification agreements with the Company’s channel partners and certain other third parties in the ordinary course of business. Pursuant to these agreements, the Company indemnifies and agrees to reimburse the indemnified party for losses incurred by the indemnified party in connection with certain intellectual property infringement and other claims by any third party with respect to the Company’s business and technology. Based on historical information and information known as of June 30, 2015, the Company does not expect it will incur any significant liabilities under these indemnification agreements. Legal Matters In September 2012, RPost Holdings, Inc., RPost Communications Limited and RMail Limited (collectively, “RPost”) filed a complaint in the United States District Court for the Eastern District of Texas that named the Company as a defendant in a lawsuit. The complaint alleged that certain elements of the Company’s email marketing technology infringe five patents held by RPost. RPost seeks an award for damages in an unspecified amount and injunctive relief. In February 2013, RPost amended its complaint to name five of the Company’s marketing partners as defendants. Under the Company’s contractual agreements with these marketing partners, the Company is obligated to indemnify them for claims related to patent infringement. The Company filed a motion to sever and stay the claims against its partners and multiple motions to dismiss the claims against the Company. In January 2014, the case was stayed pending the resolution of certain state court and bankruptcy court actions involving RPost, to which the Company is not a party. The stay was extended by agreement of the parties in December 2014. This litigation is in its very early stages. As a result, neither the ultimate outcome of this litigation nor an estimate of a probable loss or any reasonably possible losses can be assessed at this time. Nevertheless, the Company believes that it has meritorious defenses to any claim of infringement and intends to defend itself vigorously. The Company is from time to time subject to various other legal proceedings and claims, either asserted or unasserted, which arise in the ordinary course of its business. While the outcome of these other claims cannot be predicted with certainty, management does not believe that the outcome of any of these other legal matters will have a material adverse effect on the Company’s results of operations or financial condition.

401(k) Savings Plan

401(k) Savings Plan	6 Months Ended
	Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]
401(k) Savings Plan	8. 401(k) Savings Plan The Company has a defined contribution savings plan under Section 401(k) of the Internal Revenue Code of 1986. This plan covers substantially all employees who meet minimum age and service requirements and allows participants to defer a portion of their annual compensation on a pre-tax basis. Company contributions to the plan may be made at the discretion of the Board of Directors. The Company elected to make matching contributions for the plan years ending December 31, 2015 and 2014 at a rate of 100% of each employee’s contribution up to a maximum matching contribution of 3% of the employee’s compensation and at a rate of 50% of each employee’s contribution in excess of 3% up to a maximum of 5% of the employee’s compensation. Through June 30, 2015 and 2014, the Company made matching contributions of $2,238 and $1,799 for the plan years ended December 31, 2015 and 2014, respectively.

Summary of Significant Accoun15

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements include those of the Company and its subsidiaries, after elimination of all intercompany accounts and transactions. The accompanying condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The condensed consolidated balance sheet at December 31, 2014 was derived from audited financial statements, but does not include all disclosures required by GAAP. The accompanying unaudited condensed consolidated financial statements as of June 30, 2015 and for the three and six months ended June 30, 2015 and 2014 have been prepared by the Company, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. However, the Company believes that the disclosures are adequate to make the information presented not misleading. These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto for the year ended December 31, 2014 included in the Company’s Annual Report on Form 10-K, File Number 001-33707, on file with the SEC. In the opinion of management, all adjustments, consisting only of normal recurring adjustments necessary for a fair statement of the Company’s consolidated financial position as of June 30, 2015 and consolidated results of operations for the three and six months ended June 30, 2015 and 2014 and cash flows for the six months ended June 30, 2015 and 2014, have been made. The results of operations for the three and six months ended June 30, 2015 are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2015.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. On an ongoing basis, management evaluates these estimates, judgments and assumptions, including those related to revenue recognition, stock-based compensation, goodwill and acquired intangible assets, capitalization of software and website development costs and income taxes. The Company bases these estimates on historical and anticipated results and trends and on various other assumptions that the Company believes are reasonable under the circumstances, including assumptions as to future events. These estimates form the basis for making judgments about the carrying values of assets and liabilities and recorded revenue and expenses that are not readily apparent from other sources. Actual results could differ from these estimates.
Marketable Securities	Marketable Securities The Company’s marketable securities are classified as available-for-sale and are carried at fair value with the unrealized gains and losses reported as a component of accumulated other comprehensive income (loss) in stockholders’ equity. Realized gains and losses and declines in value judged to be other than temporary are included as a component of interest and other income (expense) based on the specific identification method. At June 30, 2015, marketable securities by security type consisted of: Amortized Gross Gross Estimated United States Treasury Notes $ 7,805 $ 4 $ — $ 7,809 Corporate and Agency Bonds 49,051 11 (10 ) 49,052 Total $ 56,856 $ 15 $ (10 ) $ 56,861 At June 30, 2015, marketable securities consisted of investments that mature within one year with the exception of securities with a fair value of $18,317, which have maturities within two years. At December 31, 2014, marketable securities by security type consisted of: Amortized Gross Gross Estimated United States Treasury Notes $ 20,000 $ 6 $ — $ 20,006 Corporate and Agency Bonds 37,330 2 (16 ) 37,316 Commercial Paper 999 — — 999 Total $ 58,329 $ 8 $ (16 ) $ 58,321
Fair Value of Financial Instruments	Fair Value of Financial Instruments Certain assets and liabilities are carried at fair value under GAAP. Fair value is defined 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 on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. A fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last is considered unobservable, is used to measure fair value: • Level 1 — Quoted prices in active markets for identical assets or liabilities. • Level 2 — Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The following tables present the Company’s fair value hierarchy for its investments, which are measured at fair value on a recurring basis as of June 30, 2015 and December 31, 2014: Fair Value Measurements at June 30, 2015 Using Level 1 Level 2 Level 3 Total Financial Assets: Money Market Instruments $ 7,363 $ — $ — $ 7,363 United States Treasury Notes 7,809 — — 7,809 Corporate and Agency Bonds — 49,052 — 49,052 Total $ 15,172 $ 49,052 $ — $ 64,224 Fair Value Measurements at December 31, 2014 Using Level 1 Level 2 Level 3 Total Financial Assets: Money Market Instruments $ 5,885 $ — $ — $ 5,885 United States Treasury Notes 20,006 — — 20,006 Corporate and Agency Bonds — 37,316 — 37,316 Commercial Paper — 999 — 999 Total $ 25,891 $ 38,315 $ — $ 64,206
Net Income Per Share	Net Income Per Share Basic net income per share is computed by dividing net income by the weighted average number of unrestricted common shares outstanding for the period. Diluted net income per share is computed by dividing net income by the sum of the weighted average number of unrestricted common shares outstanding during the period and the weighted average number of potential common shares from the assumed exercise of stock options and the vesting of shares of restricted stock units using the “treasury stock” method when the effect is not anti-dilutive. The following is a summary of the shares used in computing diluted net income per share: Three months ended Six months ended 2015 2014 2015 2014 (In thousands) Weighted average shares used in calculating basic net income per share 32,132 31,484 32,112 31,387 Stock options 1,026 1,002 1,210 1,016 Warrants — 1 — 1 Restricted stock units 132 133 151 128 Shares used in computing diluted net income per share 33,290 32,620 33,473 32,532 The following common stock equivalents were excluded from the computation of diluted net income per share because they had an anti-dilutive impact as the proceeds under the treasury stock method were in excess of the average fair market value for the period: Three months ended Six months ended 2015 2014 2015 2014 (In thousands) Options to purchase common stock 598 1,488 435 1,261 Restricted stock units 373 276 227 272 Total 971 1,764 662 1,533
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (the “FASB”) issued new guidance, Revenue from Contracts with Customers, In August 2014, the FASB issued new guidance, Presentation of Financial Statements — Going Concern. In April 2015, the FASB issued new guidance, Intangibles—Goodwill and Other—Internal-Use Software: Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement

Summary of Significant Accoun16

Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Summary of Marketable Securities by Security Type	At June 30, 2015, marketable securities by security type consisted of: Amortized Gross Gross Estimated United States Treasury Notes $ 7,805 $ 4 $ — $ 7,809 Corporate and Agency Bonds 49,051 11 (10 ) 49,052 Total $ 56,856 $ 15 $ (10 ) $ 56,861 At June 30, 2015, marketable securities consisted of investments that mature within one year with the exception of securities with a fair value of $18,317, which have maturities within two years. At December 31, 2014, marketable securities by security type consisted of: Amortized Gross Gross Estimated United States Treasury Notes $ 20,000 $ 6 $ — $ 20,006 Corporate and Agency Bonds 37,330 2 (16 ) 37,316 Commercial Paper 999 — — 999 Total $ 58,329 $ 8 $ (16 ) $ 58,321
Fair Value Hierarchy for Investments Measured at Fair Value on Recurring Basis	The following tables present the Company’s fair value hierarchy for its investments, which are measured at fair value on a recurring basis as of June 30, 2015 and December 31, 2014: Fair Value Measurements at June 30, 2015 Using Level 1 Level 2 Level 3 Total Financial Assets: Money Market Instruments $ 7,363 $ — $ — $ 7,363 United States Treasury Notes 7,809 — — 7,809 Corporate and Agency Bonds — 49,052 — 49,052 Total $ 15,172 $ 49,052 $ — $ 64,224 Fair Value Measurements at December 31, 2014 Using Level 1 Level 2 Level 3 Total Financial Assets: Money Market Instruments $ 5,885 $ — $ — $ 5,885 United States Treasury Notes 20,006 — — 20,006 Corporate and Agency Bonds — 37,316 — 37,316 Commercial Paper — 999 — 999 Total $ 25,891 $ 38,315 $ — $ 64,206
Summary of Shares Used in Computing Diluted Net Income Per Share	The following is a summary of the shares used in computing diluted net income per share: Three months ended Six months ended 2015 2014 2015 2014 (In thousands) Weighted average shares used in calculating basic net income per share 32,132 31,484 32,112 31,387 Stock options 1,026 1,002 1,210 1,016 Warrants — 1 — 1 Restricted stock units 132 133 151 128 Shares used in computing diluted net income per share 33,290 32,620 33,473 32,532
Common Stock Equivalents Excluded from Computation of Diluted Net Income Per Share	The following common stock equivalents were excluded from the computation of diluted net income per share because they had an anti-dilutive impact as the proceeds under the treasury stock method were in excess of the average fair market value for the period: Three months ended Six months ended 2015 2014 2015 2014 (In thousands) Options to purchase common stock 598 1,488 435 1,261 Restricted stock units 373 276 227 272 Total 971 1,764 662 1,533

Goodwill and Acquired Intangi17

Goodwill and Acquired Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible assets consist of the following: Estimated June 30, 2015 December 31, 2014 Gross Accumulated Net Carrying Gross Accumulated Net Carrying Developed technology 3 years $ 4,357 $ 3,907 $ 450 $ 4,357 $ 3,465 $ 892 Customer relationships 3.75 years 3,315 3,007 308 3,315 2,666 649 Publisher relationships 5 years 710 438 272 710 367 343 Trade name 5 years 570 351 219 570 294 276 $ 8,952 $ 7,703 $ 1,249 $ 8,952 $ 6,792 $ 2,160
Future Estimated Amortization Expense for Intangible Assets	Future estimated amortization expense for intangible assets as of June 30, 2015 is as follows: Remainder of 2015 $ 672 2016 470 2017 107 Total $ 1,249

Stockholders' Equity and Stoc18

Stockholders' Equity and Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Recognized Stock-Based Compensation Expense	The Company recognized stock-based compensation expense on all awards in cost of revenue and operating expense categories as follows: Three months ended Six months ended 2015 2014 2015 2014 Cost of revenue $ 558 $ 506 $ 1,057 $ 948 Research and development 909 783 1,776 1,803 Sales and marketing 1,368 1,578 2,559 2,610 General and administrative 1,787 1,543 3,534 2,963 $ 4,622 $ 4,410 $ 8,926 $ 8,324

Accrued Expenses (Tables)

Accrued Expenses (Tables)	6 Months Ended
	Jun. 30, 2015
Payables and Accruals [Abstract]
Components of Accrued Expenses	June 30, December 31, Payroll and payroll-related $ 4,623 $ 4,430 Licensed software and maintenance 1,197 1,197 Marketing programs 2,102 490 Other accrued expenses 6,641 6,113 $ 14,563 $ 12,230

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2015
Office Leases [Member]
Future Minimum Lease Payments under Leases and Agreements	As of June 30, 2015, future minimum lease payments under non-cancelable office leases are as follows: Remainder of 2015 $ 4,724 2016 9,913 2017 9,798 2018 9,396 2019 8,284 Thereafter 21,891 64,006 Less: Sublease income 573 $ 63,433
Third-Party Hosting Agreements [Member]
Future Minimum Lease Payments under Leases and Agreements	As of June 30, 2015, future minimum payments under the agreements are as follows: Remainder of 2015 $ 1,978 2016 4,049 2017 775 Total $ 6,802

Summary of Significant Accoun21

Summary of Significant Accounting Policies - Summary of Marketable Securities by Security Type (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 56,856	$ 58,329
Gross Unrealized Gains	15	8
Gross Unrealized Losses	(10)	(16)
Estimated Fair Value	56,861	58,321
Corporate and Agency Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	49,051	37,330
Gross Unrealized Gains	11	2
Gross Unrealized Losses	(10)	(16)
Estimated Fair Value	49,052	37,316
United States Treasury Notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,805	20,000
Gross Unrealized Gains	4	6
Estimated Fair Value	$ 7,809	20,006
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		999
Estimated Fair Value		$ 999

Summary of Significant Accoun22

Summary of Significant Accounting Policies - Additional Information (Detail) - Jun. 30, 2015 - USD ($) $ in Thousands	Total
Summary Of Significant Accounting Policies [Line Items]
Fair value of marketable securities classified as available-for-sale	$ 18,317
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Maturity period for marketable securities classified as available-for-sale	2 years
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Maturity period for marketable securities classified as available-for-sale	1 year

Summary of Significant Accoun23

Summary of Significant Accounting Policies - Fair Value Hierarchy for Investments Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financial Assets:
Available for sale securities fair value disclosure	$ 56,861	$ 58,321
United States Treasury Notes [Member]
Financial Assets:
Available for sale securities fair value disclosure	7,809	20,006
Commercial Paper [Member]
Financial Assets:
Available for sale securities fair value disclosure		999
Recurring [Member]
Financial Assets:
Total	64,224	64,206
Recurring [Member] | Money Market Instruments [Member]
Financial Assets:
Cash and cash equivalents fair value disclosure	7,363	5,885
Recurring [Member] | United States Treasury Notes [Member]
Financial Assets:
Available for sale securities fair value disclosure	7,809	20,006
Recurring [Member] | Corporate and Agency Bonds [Member]
Financial Assets:
Available for sale securities fair value disclosure	49,052	37,316
Recurring [Member] | Commercial Paper [Member]
Financial Assets:
Available for sale securities fair value disclosure		999
Level 2 [Member] | Recurring [Member]
Financial Assets:
Total	49,052	38,315
Level 2 [Member] | Recurring [Member] | Corporate and Agency Bonds [Member]
Financial Assets:
Available for sale securities fair value disclosure	49,052	37,316
Level 2 [Member] | Recurring [Member] | Commercial Paper [Member]
Financial Assets:
Available for sale securities fair value disclosure		999
Level 1 [Member] | Recurring [Member]
Financial Assets:
Total	15,172	25,891
Level 1 [Member] | Recurring [Member] | Money Market Instruments [Member]
Financial Assets:
Cash and cash equivalents fair value disclosure	7,363	5,885
Level 1 [Member] | Recurring [Member] | United States Treasury Notes [Member]
Financial Assets:
Available for sale securities fair value disclosure	$ 7,809	$ 20,006

Summary of Significant Accoun24

Summary of Significant Accounting Policies - Summary of Shares used in Computing Diluted Net Income Per Share (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Weighted average shares used in calculating basic net income per share	32,132	31,484	32,112	31,387
Shares used in computing diluted net income per share	33,290	32,620	33,473	32,532
Stock Options [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock options and restricted stock units	1,026	1,002	1,210	1,016
Restricted Stock Units [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock options and restricted stock units	132	133	151	128
Warrants [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Warrants		1		1

Summary of Significant Accoun25

Summary of Significant Accounting Policies - Common Stock Equivalents Excluded from Computation of Diluted Net Income Per Share (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	971	1,764	662	1,533
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	598	1,488	435	1,261
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	373	276	227	272

Goodwill and Acquired Intangi26

Goodwill and Acquired Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Carrying amount of goodwill	$ 95,505		$ 95,505		$ 95,505
Amortization expense for intangible assets	$ 427	$ 554	$ 911	$ 1,121

Goodwill and Acquired Intangi27

Goodwill and Acquired Intangible Assets - Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 8,952	$ 8,952
Accumulated Amortization	7,703	6,792
Net Carrying Amount	$ 1,249	2,160
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Gross Carrying Amount	$ 4,357	4,357
Accumulated Amortization	3,907	3,465
Net Carrying Amount	$ 450	892
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years 9 months
Gross Carrying Amount	$ 3,315	3,315
Accumulated Amortization	3,007	2,666
Net Carrying Amount	$ 308	649
Publisher Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Gross Carrying Amount	$ 710	710
Accumulated Amortization	438	367
Net Carrying Amount	$ 272	343
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Gross Carrying Amount	$ 570	570
Accumulated Amortization	351	294
Net Carrying Amount	$ 219	$ 276

Goodwill and Acquired Intangi28

Goodwill and Acquired Intangible Assets - Future Estimated Amortization Expense for Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2015	$ 672
2,016	470
2,017	107
Net Carrying Amount	$ 1,249	$ 2,160

Stockholders' Equity and Stoc29

Stockholders' Equity and Stock-Based Compensation - Stock Repurchase Program - Additional Information (Detail) - USD ($)	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
2014 Stock Repurchase Program [Member]
Equity, Share Repurchase Program [Line Items]
Stock repurchase program authorized amount of shares repurchased		$ 30,000,000
Number of shares repurchased	156,120
Stock repurchase program average purchase price per share	$ 29.72
2015 Stock Repurchase Program [Member]
Equity, Share Repurchase Program [Line Items]
Stock repurchase program authorized amount of shares repurchased	$ 50,000,000
Stock repurchased during period, shares	0

Stockholders' Equity and Stoc30

Stockholders' Equity and Stock-Based Compensation - Stock-Based Compensation Expense - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capitalized stock-based compensation expense	$ 76	$ 50	$ 144	$ 100
2011 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock available for issuance	1,220,997		1,220,997
2007 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock available for issuance	268,549		268,549

Stockholders' Equity and Stoc31

Stockholders' Equity and Stock-Based Compensation - Recognized Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 4,622	$ 4,410	$ 8,926	$ 8,324
Cost of Revenue [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	558	506	1,057	948
Research and Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	909	783	1,776	1,803
Sales and Marketing [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,368	1,578	2,559	2,610
General and Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,787	$ 1,543	$ 3,534	$ 2,963

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Net deferred tax assets	$ 8,009,000	$ 6,443,000
Unrecognized tax benefits	0	0
Unrecognized tax benefits, accrued interest or tax penalties	$ 0	$ 0

Accrued Expenses - Components o

Accrued Expenses - Components of Accrued Expenses (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Payroll and payroll-related	$ 4,623	$ 4,430
Licensed software and maintenance	1,197	1,197
Marketing programs	2,102	490
Other accrued expenses	6,641	6,113
Accrued expenses, total	$ 14,563	$ 12,230

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)OptionPlanVendor	Jun. 30, 2014USD ($)	Dec. 31, 2014USD ($)
Operating Leased Assets [Line Items]
Expiration of lease agreement			Various dates through 2017
Prepaid expenses and other current assets	$ 12,869		$ 12,869		$ 10,723
Other assets	2,563		2,563		1,893
Amount of contractual commitments with various vendors over the next twelve months	27,389		27,389
Letter of credit for the benefit of the landlord	1,300		1,300		1,300
Cash balance to secure the letter of credit	1,300		1,300		1,300
Office Leases [Member]
Operating Leased Assets [Line Items]
Prepaid rent	49		49		51
Prepaid expenses and other current assets	14		14		3
Other assets	35		35		48
Accrued rent balance	4,568		4,568		4,232
Rent expense	2,337	$ 2,262	4,746	$ 4,582
Income on sublease	47		94
Office Leases [Member] | Accrued Expenses [Member]
Operating Leased Assets [Line Items]
Accrued rent balance included in accrued expenses	777		777		577
Office Leases [Member] | Other Long-Term Liabilities [Member]
Operating Leased Assets [Line Items]
Accrued rent balance included in other long-term liabilities	3,791		3,791		3,655
Third-Party Hosting Agreements [Member]
Operating Leased Assets [Line Items]
Prepaid rent	357		357		501
Prepaid expenses and other current assets	250		250		295
Other assets	107		107		206
Accrued rent balance	160		160		172
Rent expense	1,111	$ 1,043	$ 2,216	$ 2,106
Number of vendors provide for related services | Vendor			2
Third-Party Hosting Agreements [Member] | Accrued Expenses [Member]
Operating Leased Assets [Line Items]
Accrued rent balance included in accrued expenses	57		$ 57		38
Third-Party Hosting Agreements [Member] | Other Long-Term Liabilities [Member]
Operating Leased Assets [Line Items]
Accrued rent balance included in other long-term liabilities	$ 103		$ 103		$ 134
Headquarters Space [Member]
Operating Leased Assets [Line Items]
Lease expiration date			Sep. 22, 2022
Time period for extension option			10 years
Number of extension option | OptionPlan			1
Sales and Support Office [Member]
Operating Leased Assets [Line Items]
Time period for extension option			3 years
Number of extension option | OptionPlan			3
Expiration of lease agreement			April 2,019
General Office [Member]
Operating Leased Assets [Line Items]
Expiration of lease agreement			Various dates through 2018

Commitments and Contingencies35

Commitments and Contingencies - Future Minimum Lease Payments under Leases and Agreements (Detail) $ in Thousands	Jun. 30, 2015USD ($)
Office Leases [Member]
Operating Leased Assets [Line Items]
Remainder of 2015	$ 4,724
2,016	9,913
2,017	9,798
2,018	9,396
2,019	8,284
Thereafter	21,891
Total	64,006
Less: Sublease income	573
Net operating lease obligation	63,433
Third-Party Hosting Agreements [Member]
Operating Leased Assets [Line Items]
Remainder of 2015	1,978
2,016	4,049
2,017	775
Total	$ 6,802

401(k) Savings Plan - Additiona

401(k) Savings Plan - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Defined Contribution Plan Disclosure [Line Items]
Contribution by employer to 401 (k) Savings Plan	$ 2,238	$ 1,799
Employee's Contributions up to 3% [Member]
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution, percent	100.00%	100.00%
Employee's Contributions Between 3% and 5% [Member]
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution, percent	50.00%	50.00%
100% of Matching Contribution [Member]
Defined Contribution Plan Disclosure [Line Items]
Percentage of the employee's compensation	3.00%	3.00%
50% of Matching Contribution [Member]
Defined Contribution Plan Disclosure [Line Items]
Percentage of the employee's compensation	5.00%	5.00%
50% of Matching Contribution [Member] | Minimum [Member]
Defined Contribution Plan Disclosure [Line Items]
Percentage of the employee's compensation	3.00%	3.00%