Rocket Fuel 10-Q 14 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 31, 2014
Document and Entity Information	'	'
Entity Registrant Name	'Rocket Fuel Inc.	'
Entity Central Index Key	'0001477200	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Amendment Flag	'false	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	41,295,064
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current Assets:	'	'
Cash and cash equivalents	$111,632	$113,873
Accounts receivable, net	116,229	90,502
Deferred tax assets	1,154	207
Prepaid expenses	3,974	2,164
Other current assets	15,331	3,962
Total current assets	248,320	210,708
Property, equipment and software, net	78,217	25,794
Restricted cash	3,010	0
Intangible assets	73,525	0
Goodwill	114,871	0
Other assets	1,198	1,006
Total assets	519,141	237,508
Current Liabilities:	'	'
Accounts payable	65,284	39,910
Accrued and other current liabilities	33,268	21,584
Deferred revenue	1,251	918
Current portion of capital leases	2,695	203
Current portion of debt	45,990	7,243
Total current liabilities	148,488	69,858
Long-term debt—Less current portion	15,965	19,568
Capital leases—Less current portion	5,024	412
Deferred rent—Less current portion	24,260	3,909
Deferred tax liabilities	2,231	207
Other liabilities	543	387
Total liabilities	196,511	94,341
Commitments and contingencies (Note 13)	'	'
Stockholders’ Equity	'	'
Common stock, $0.001 par value— 1,000,000,000 authorized as of September 30, 2014 and December 31, 2013, respectively; 41,234,242 and 32,825,992 issued and outstanding as of September 30, 2014 and December 31, 2013, respectively	41	33
Additional paid-in capital	410,923	187,624
Accumulated other comprehensive loss	-44	-15
Accumulated deficit	-88,290	-44,475
Total stockholders’ equity	322,630	143,167
Total liabilities and stockholders’ equity	$519,141	$237,508

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]	'	'
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	41,234,242	32,825,992
Common stock, shares outstanding	41,234,242	32,825,992

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (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
Income Statement [Abstract]	'	'	'	'
Revenue	$102,098	$62,458	$269,137	$155,039
Cost of revenue	54,952	31,877	139,410	81,529
Gross profit	47,146	30,581	129,727	73,510
Operating expenses:	'	'	'	'
Research and development	11,200	4,464	26,875	10,587
Sales and marketing	40,421	21,644	103,969	56,293
General and administrative	19,320	8,719	41,795	19,671
Total operating expenses	70,941	34,827	172,639	86,551
Loss from operations	-23,795	-4,246	-42,912	-13,041
Other expense, net:	'	'	'	'
Interest expense	-1,157	-251	-2,085	-604
Other income (expense)—net	-1,999	155	-2,443	-213
Change in fair value of convertible preferred stock warrant liability	0	-2,385	0	-4,740
Other expense, net	-3,156	-2,481	-4,528	-5,557
Loss before income taxes	-26,951	-6,727	-47,440	-18,598
Income tax benefit (provision)	4,120	-133	3,625	-173
Net loss	($22,831)	($6,860)	($43,815)	($18,771)
Basic and diluted net loss per share attributable to common stockholders	($0.61)	($0.61)	($1.23)	($2.01)
Basic and diluted weighted-average shares used to compute net loss per share attributable to common stockholders	37,230	11,315	35,490	9,346

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'		'		'	'
Net loss	($22,831)		($6,860)		($43,815)	($18,771)
Other comprehensive loss:	'		'		'	'
Foreign currency translation adjustments	-54	[1]	24	[1]	-29	-17
Comprehensive loss	($22,885)		($6,836)		($43,844)	($18,788)
[1]	Reclassifications out of Other comprehensive income (loss) into Net loss were not significant.

CONSOLIDATED_STATEMENTS_OF_STO

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
In Thousands, except Share data, unless otherwise specified
Balance at Dec. 31, 2013	$143,167	$33	$187,624	($15)	($44,475)
Balance (in shares) at Dec. 31, 2013	'	32,825,992	'	'	'
Increase (Decrease) in Stockholders' Equity	'	'	'	'	'
Issuance of common stock upon exercises of employee stock options, net of repurchases	3,377	1	3,376	'	'
Issuance of common stock upon exercises of employee stock options, net of repurchases (in shares)	959,588	937,733	'	'	'
Issuance of common stock upon vesting of restricted stock units	0	0	'	'	'
Issuance of common stock upon exercise vesting of restricted stock units (in shares)	'	54,334	'	'	'
Shares withheld related to net share settlement of restricted stock units	-241	'	-241	'	'
Stock Issued During Period, Shares, Acquisitions	5,253,084	5,253,084	'	'	'
Stock Issued During Period, Value, Acquisitions	82,421	5	82,416	'	'
Shares withheld related to net share settlement of restricted stock units (in shares)	'	-15,351	'	'	'
Issuance of stock, net of issuance costs	115,403	2	115,401	'	'
Issuance of stock, net of issuance costs (in shares)	'	2,000,000	'	'	'
Issuance of common stock in connection with employee stock purchase plan	3,792	'	3,792	'	'
Issuance of common stock in connection with employee stock purchase plan (in shares)	'	178,450	'	'	'
Stock-based compensation	18,376	'	18,376	'	'
Foreign currency translation adjustment	-29	'	'	-29	'
Tax benefit from stock-based award activity	179	'	179	'	'
Net loss	-43,815	'	'	'	-43,815
Balance at Sep. 30, 2014	$322,630	$41	$410,923	($44)	($88,290)
Balance (in shares) at Sep. 30, 2014	'	41,234,242	'	'	'

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
OPERATING ACTIVITIES:	'	'
Net loss	($43,815)	($18,771)
Adjustments to reconcile net loss to net cash used in operating activities:	'	'
Depreciation and amortization	12,525	4,583
Provision for doubtful accounts	62	521
Stock-based compensation	17,193	6,277
Amortization of debt discount	144	1
Excess tax benefit from stock-based activity	-179	0
Loss (gain) on disposal of property, equipment and software	216	-26
Change in fair value of preferred stock warrant liability	0	4,740
Changes in operating assets and liabilities:	'	'
Accounts receivable	-5,062	-21,236
Prepaid expenses	-783	-649
Other current assets	-11,368	-292
Other assets	-247	-700
Accounts payable	13,925	12,532
Accrued and other liabilities	-1,475	5,496
Deferred rent	20,471	100
Deferred revenue	323	264
Other liabilities	-3,894	0
Net cash used in operating activities	-1,964	-7,160
INVESTING ACTIVITIES:	'	'
Purchases of property, equipment and software	-40,286	-5,564
Business acquisition, net	-97,444	0
Capitalized internal-use software development costs	-5,459	-4,486
Restricted cash	-2,203	0
Net cash used in investing activities	-145,392	-10,050
FINANCING ACTIVITIES:	'	'
Proceeds from the issuance of common stock in initial and follow-on public offering, net of underwriting discounts and commission	116,510	107,880
Issuance costs related to initial and follow-on public offering	-1,107	-1,534
Proceeds from Warrant Exercises	0	97
Proceeds from exercise of vested common stock options	2,682	208
Proceeds from early exercise of unvested common stock options	17	1,058
Repurchases of common stock options early exercised	-24	-11
Excess tax benefit from stock-based activity	179	0
Proceeds from issuance of common stock from employee stock purchase plan	3,792	0
Tax withholdings related to net share settlements of restricted stock units	-241	0
Repayment of capital lease obligations	-559	0
Borrowings from line of credit	35,000	10,000
Proceeds from issuance of long-term debt	0	10,000
Repayment of long-term debt	-11,133	-114
Net cash provided by financing activities	145,116	127,584
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	-1	12
CHANGE IN CASH AND CASH EQUIVALENTS	-2,241	110,386
CASH AND CASH EQUIVALENTS—Beginning of period	113,873	14,896
CASH AND CASH EQUIVALENTS—End of period	111,632	125,282
SUPPLEMENTAL DISCLOSURES OF OTHER CASH FLOW INFORMATION:	'	'
Cash paid for income taxes, net of refunds	195	348
Cash paid for interest	1,598	543
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:	'	'
Purchases of property and equipment recorded in accounts payable and accruals	7,523	4,952
Offering costs recorded in accrued liabilities	0	3,194
Property, plant and equipment acquired under capital lease obligations	7,855	0
Vesting of early exercised options	674	229
Stock-based compensation capitalized in internal-use software costs	1,183	437
Stock Issued	82,421	0
Conversion of Convertible Preferred Stock to Common Stock	0	60,617
Conversion of Preferred Stock Warrants to Common Stock Warrants	$0	$7,481

NATURE_OF_BUSINESS_AND_SUMMARY

NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	'
	NOTE 1. NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Rocket Fuel Inc. (the “Company”) was incorporated as a Delaware corporation on March 25, 2008. The Company is a provider of artificial-intelligence digital advertising solutions and is headquartered in Redwood City, California, and has offices in various cities across the United States. The Company established a wholly-owned subsidiary in the United Kingdom in 2011, in Canada in 2013, and in Brazil during the third quarter of 2014. The United Kingdom subsidiary has offices throughout Europe and in Australia and established a wholly-owned subsidiary in Germany in 2013.
	In September 2013, the Company completed the initial public offering of its common stock (the “IPO”) whereby 4,000,000 shares of common stock were sold by the Company and 600,000 shares of common stock were sold by selling stockholders. The public offering price of the shares sold in the offering was $29.00 per share. The Company did not receive any proceeds from the sale of shares by the selling stockholders. The total gross proceeds from the offering to the Company were $116.0 million. After deducting underwriters’ discounts and commissions and offering expenses, the aggregate net proceeds received by the Company totaled approximately $103.3 million.
	In February 2014, the Company completed an underwritten follow-on public offering (the “Follow-on Offering”) of its common stock in which 2,000,000 shares of common stock were sold by the Company and 3,000,000 shares of common stock were sold by selling stockholders. The public offering price of the shares sold in the offering was $61.00 per share. The Company did not receive any proceeds from the sale of shares by the selling stockholders. The total gross proceeds from the offering to the Company were $122.0 million. After deducting underwriters’ discounts and commissions and offering expenses, the aggregate net proceeds received by the Company totaled approximately $115.4 million.
	Basis of Presentation—The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, 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, 2013, included in its Annual Report on Form 10-K.
	The condensed consolidated balance sheet as of December 31, 2013 included herein was derived from the audited financial statements as of that date, but does not include all notes and other disclosures required by GAAP.
	In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year 2014 or any future period.
	Principles of Consolidation—The consolidated financial statements include the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation.
	Use of Estimates—The preparation of unaudited condensed consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Such estimates include, but are not limited to, provisions for doubtful accounts, the amount of software development costs which should be capitalized, future taxable income, the useful lives of long-lived assets and the assumptions used for purposes of determining stock-based compensation. Actual results could differ from those estimates.
	Foreign Currency Translation—The Company’s foreign subsidiaries record their assets, liabilities and results of operations in their local currencies, which are their functional currencies. The Company translates its subsidiaries' consolidated financial statements into U.S. dollars each reporting period for purposes of consolidation.
	Assets and liabilities of the Company’s foreign subsidiaries are translated at the period-end currency exchange rates, certain equity accounts are translated at historical exchange rates and revenue, expenses, gains and losses are translated at the average currency exchange rates in effect for the period. The effects of these translation adjustments are reported in a separate component of stockholders’ equity titled accumulated other comprehensive income (loss).
	Fair Value of Financial Instruments—The Company’s financial instruments consist principally of cash equivalents, accounts receivable, accounts payable, accrued liabilities, capital leases, term debt and revolving credit facilities. The fair value of the Company’s cash equivalents is determined based on quoted prices in active markets for identical assets for its money market funds. The recorded values of the Company’s accounts receivable, accounts payable and accrued liabilities approximate their current fair values due to the relatively short-term nature of these accounts. The Company believes that the fair value of the capital leases, term debt and revolving credit facilities approximates its recorded amount as of September 30, 2014 as the interest rates on the term debt and revolving credit facilities are variable and the rates for each are based on market interest rates after consideration of default and credit risk.
	Cash and Cash Equivalents—Cash consists of cash maintained in checking and savings accounts. All highly liquid investments purchased with an original maturity date of 90 days or less at the date of purchase are considered to be cash equivalents. Cash equivalents consist of money market funds.
	Restricted Cash—Restricted cash as of September 30, 2014 consists of cash required to be deposited with financial institutions for security deposits for some of the Company's office lease agreements.
	Concentration of Credit Risk—Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and accounts receivable. A significant portion of the Company’s cash is held at three major financial institutions that the Company's management has assessed to be of high credit quality. The Company has not experienced any losses in such accounts.
	The Company mitigates its credit risk with respect to accounts receivable by performing credit evaluations and monitoring agencies' and advertisers' accounts receivable balances. As of September 30, 2014, three agency holding companies and no single advertiser accounted for 10% of more of accounts receivable. As of December 31, 2013, no single agency holding company or advertiser accounted for 10% or more of accounts receivable.
	With respect to revenue concentration, the Company defines a customer as an advertiser that is a distinct source of revenue and is legally bound to pay for the advertising services that the Company delivers on the advertiser’s behalf. The Company counts all advertisers within a single corporate structure as one customer even in cases where multiple brands, branches or divisions of an organization enter into separate contracts with the Company. During the three and nine months ended September 30, 2014 and 2013, no single customer represented 10% or more of revenue.
	The Company also monitors the percentage of revenue that flows through advertising agencies, even though advertising agencies that act on behalf of the Company’s advertisers are not considered customers based on the definition above. If all branches and divisions within each global advertising agency were considered to be a single agency for this purpose, three agency holding companies would have been associated with 10% or more of revenue during the three and nine months ended September 30, 2014, and two agency holding companies would have been associated with 10% or more of revenue during the three and nine months ended September 30, 2013.
	Provision for Doubtful Accounts—The Company records a provision for doubtful accounts based on historical experience and a detailed assessment of the collectability of its accounts receivable. In estimating the allowance for doubtful accounts, management considers, among other factors, the aging of the accounts receivable, historical write-offs and the credit-worthiness of each customer. If circumstances change, such as higher-than-expected defaults or an unexpected material adverse change in a major customer’s ability to meet its financial obligations, the Company’s estimate of the recoverability of the amounts due could be reduced by a material amount.
	The following table presents the changes in the allowance for doubtful accounts (in thousands):
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014			2013
	Allowance for doubtful accounts:
	Balance, beginning of period	$	797	$	485	$	1,057		$	468
	Add: bad debt expense	53		505		254			521
	Less: write-offs, net of recoveries	271		18		(190		)	19
	Balance, end of period	$	1,121	$	1,008	$	1,121		$	1,008
	Property and Equipment—Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization is computed using the straight-line method over the estimated useful lives of the related assets. Maintenance and repairs are charged to expense as incurred, and improvements and betterments are capitalized. When assets are retired or otherwise disposed of, the cost and accumulated depreciation or amortization, as applicable, are removed from the balance sheet and any resulting gain or loss is reflected in operations in the period realized.
	Construction in progress primarily includes costs related to the leasehold improvements and also includes network equipment infrastructure to support the Company's data centers around the world. Interest capitalized during the periods presented was not material.
	Leasehold improvements are amortized on a straight-line basis over the term of the lease, or the useful life of the assets, whichever is shorter. Depreciation and amortization periods for the Company’s property and equipment are as follows:
	Asset Classification	Estimated Useful Life
	Computer hardware and purchased software	2–3 years
	Capitalized internal-use software costs	2–3 years
	Office equipment, furniture and fixtures	5 years
	Internal-Use Software Development Costs—The Company incurs costs to develop software for internal use. The Company expenses all costs that relate to the planning and post implementation phases of development as research and development expense. The Company capitalizes costs when preliminary efforts are successfully completed, management has authorized and committed project funding, and it is probable that the project will be completed and will be used as intended. Costs incurred for enhancements that are expected to result in additional material functionality are capitalized. The Company capitalized $2.3 million and $1.7 million in internal-use software costs during the three months ended September 30, 2014 and 2013, respectively, and $6.6 million and $4.9 million for the nine months ended September 30, 2014 and 2013, respectively. These capitalized amounts are included in property, equipment and software—net on the condensed consolidated balance sheets.
	Amortization commences when the website or software for internal use is ready for its intended use and the amortization period is the estimated useful life of the related asset. Amortization expense totaled $1.4 million and $0.9 million for the three months ended September 30, 2014 and 2013, respectively, and $3.7 million and $2.5 million for the nine months ended September 30, 2014 and 2013, respectively.
	Impairment of Long-lived Assets—The Company periodically reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset is impaired or the estimated useful life is no longer appropriate. If indicators of impairment exist and the undiscounted projected cash flows associated with an asset are less than the carrying amount of the asset, an impairment loss is recorded to write the asset down to its estimated fair value. Fair value is estimated based on discounted future cash flows. No impairment charges were recorded during the three and nine months ended September 30, 2014 and 2013.
	Business Combinations—The Company accounts for business combinations using the acquisition accounting method as required under the provisions of FASB ASC 805, Business Combinations, or ASC 805. The total purchase price is allocated to the assets acquired and liabilities assumed based on fair values at the date of acquisition. Goodwill as of the acquisition date is measured as the excess of consideration transferred over the net of the acquisition date fair values of the identifiable assets acquired and the liabilities assumed.
	Best estimates and assumptions are used in the purchase price allocation process to accurately value assets acquired and liabilities assumed at the business combination date. These estimates and assumptions are inherently uncertain and subject to refinement. As a result, during the preliminary purchase price allocation period, which may be up to one year from the business combination date, the Company may record adjustments to the assets acquired and liabilities assumed, with the corresponding adjustment to goodwill. After the preliminary purchase price allocation period, adjustments are recorded in the operating results in the period in which the adjustments were determined.
	The fair value assigned to identifiable intangible assets acquired is determined using the income approach which discounts expected future cash flows to present value using estimations and assumptions determined by management. The Company believes that these identified intangible assets will have no residual value after their estimated economic useful lives. The identifiable intangible assets are subject to amortization on a straight-line basis as this best approximates the benefit period related to these assets.
	The excess of the purchase price over the identified tangible and intangible assets, less liabilities assumed, is recorded as goodwill and primarily reflects the value of the synergies expected to be generated from combining the Company's and the acquired entity’s technology and operations. Generally, the goodwill is not deductible for income tax purposes.
	Goodwill, Intangibles and Impairment Assessments —Goodwill represents the excess of the aggregate purchase price paid over the fair value of the net tangible and intangible assets acquired. Intangible assets that are not considered to have an indefinite useful life are amortized over their useful lives. The Company evaluates the estimated remaining useful lives of purchased intangible assets and whether events or changes in circumstances warrant a revision to the remaining periods of amortization.
	Goodwill is not amortized and is tested for impairment at least annually or whenever events or changes in circumstances indicate that the carrying value may not be recoverable. The Company has determined that it operates as one reporting unit and has selected December 1 as the date to perform its annual impairment test.
	In the impairment assessment of its goodwill, the Company performs a qualitative assessment and then, if necessary, a two step impairment test, which involves assumptions regarding estimated future cash flows to be derived from the Company. If these estimates or their related assumptions change in the future, the Company may be required to record impairment for these assets. The first step of the impairment test involves comparing the fair value of the reporting unit to its net book value, including goodwill. If the net book value exceeds its fair value, then the Company would perform the second step of the goodwill impairment test to determine the amount of the impairment loss. The impairment loss would be calculated by comparing the implied fair value of the Company to its net book value. In calculating the implied fair value of the Company’s goodwill, the fair value of the Company would be allocated to all of the other assets and liabilities based on their fair values. The excess of the fair value of the Company over the amount assigned to its other assets and liabilities is the implied fair value of goodwill. An impairment loss would be recognized when the carrying amount of goodwill exceeds its implied fair value. There has been no impairment of goodwill during the periods presented.
	Revenue Recognition—To date, the Company has generated most of its revenue by delivering digital advertisements to Internet users through various channels, including display, mobile, social and video. This aspect of its business is referred to as a demand side platform, or “DSP.”
	The Company recognizes revenue when all four of the following criteria are met:
	•    Persuasive evidence of an arrangement exists,
	•    Delivery has occurred or a service has been provided,
	•    Customer fees are fixed or determinable, and
	•    Collection is reasonably assured.
	These revenue arrangements are generally evidenced by a fully-executed insertion order (“IO”). Generally, IOs state the number and type of advertising impressions (cost-per-thousand) to be delivered, the agreed upon rate for each delivered impression, and a fixed period of time for delivery.
	The Company determines collectability by performing ongoing credit evaluations and monitoring its customers’ accounts receivable balances. For new customers and their agents, which may be advertising agencies or other third parties, the Company performs a credit check with an independent credit agency and may check credit references to determine creditworthiness. The Company only recognizes revenue when collection is reasonably assured.
	In the normal course of business, the Company frequently contracts with advertising agencies on behalf of their advertiser clients. The determination of whether revenue from DSP arrangements should be reported on a gross or net basis is based on an assessment of whether the Company is acting as the principal or an agent in the transaction. In determining whether the Company acts as the principal or an agent, the Company follows the accounting guidance for principal-agent considerations. While none of the factors identified in this guidance is individually considered presumptive or determinative, because (a) the Company is the primary obligor and is responsible for (i) fulfilling the advertisement delivery, (ii) establishing the selling prices for delivery of the advertisements, (iii) selecting the media to fulfill the insertion order, and (iv) performing all billing and collection activities including retaining credit risk, and (b) the Company has the risk of fluctuating costs from its media vendors relative to fixed pricing negotiated with its customers and has discretion in selecting media vendors when fulfilling a customer’s campaign, the Company has concluded that it acts as the principal in the majority of these arrangements and therefore reports revenue earned and costs incurred on a gross basis.
	On occasion, the Company has offered customer incentive programs that provide rebates after achieving a specified level of advertising spending. The Company records reductions to revenue for estimated commitments related to these customer incentive programs. For transactions involving incentives, the Company recognizes revenue net of the estimated amount to be paid by rebate, provided that the rebate amount can be reasonably and reliably estimated and the other conditions for revenue recognition have been met. The Company’s policy requires that, if rebates cannot be reliably estimated, revenue is not recognized until reliable estimates can be made or the rebate program lapses.
	In addition to delivering internet advertising through its full-service DSP, the Company licenses a self-service version of its DSP technology platforms and its data management platform ("DMP") to agencies and advertisers for their own use. These arrangements do not provide the customer with the right to take possession of the software or platform. The Company also provides professional services to certain of its customers. Revenue from license agreements is recognized ratably over the license term. Professional services consist primarily of assisting these customers with on-site support, training and other consulting services. When professional services are not considered essential to the functionality of the software, revenue is recognized ratably over the service or related subscription term, whichever is longer, otherwise recognition is deferred until the services are completed.
	Multiple-Element Arrangements—The Company enters into arrangements to sell advertising that includes different media placements or ad services that are delivered at the same time, or within close proximity of one another. The Company allocates arrangement consideration in multiple-deliverable revenue arrangements at the inception of an arrangement to all deliverables or those packages in which all components of the package are delivered at the same time, based on the relative selling price method in accordance with the selling price hierarchy, which includes: (1) vendor-specific objective evidence (“VSOE”), if available; (2) third-party evidence (“TPE”), if VSOE is not available; and (3) best estimate of selling price (“BESP”), if neither VSOE nor TPE is available.
	VSOE—The Company determines VSOE based on its historical pricing and discounting practices for the specific product or service when sold separately. In determining VSOE, the Company requires that a substantial majority of the stand-alone selling prices for these services fall within a reasonably narrow pricing range. The Company has not been able to establish VSOE for any of its advertising offerings.
	TPE—When VSOE cannot be established for deliverables in multiple element arrangements, the Company applies judgment with respect to whether it can establish a selling price based on TPE. TPE is determined based on competitor prices for similar deliverables when sold separately. Generally, the Company’s go-to-market strategy differs from that of its peers and its offerings contain a significant level of differentiation such that the comparable pricing of services cannot be obtained. Furthermore, the Company is unable to reliably determine the selling prices of similar competitor services on a stand-alone basis. As a result, the Company has not been able to establish selling price based on TPE.
	BESP—When it is unable to establish selling price using VSOE or TPE, the Company uses BESP in its allocation of arrangement consideration. The objective of BESP is to determine the price at which the Company would transact a sale if the service were sold on a stand-alone basis. BESP is generally used to allocate the selling price to deliverables in the Company’s multiple element arrangements. The Company determines BESP for deliverables by considering multiple factors, including, but not limited to, prices it charges for similar offerings, market conditions, competitive landscape and pricing practices. In particular, the Company reviews multiple data points to determine BESP, including price lists used by the Company’s sales team in pricing negotiations, historical average and median pricing achieved in prior contractual customer arrangements and input from the Company’s sales operation department regarding what it believes the deliverables could be sold for on a stand-alone basis. BESP is determined at an advertising unit level that is consistent with the Company’s underlying market strategy and stratified based on specific consideration of channel, geography, industry and size, as deemed necessary.
	The Company limits the amount of allocable arrangement consideration to amounts that are fixed or determinable and that are not contingent on future performance or future deliverables. The Company regularly reviews BESP. Changes in assumptions or judgments or changes to the elements in the arrangement could cause a material increase or decrease in the amount of revenue that the Company reports in a particular period.
	The Company recognizes the relative fair value of advertising services as they are delivered, assuming all other revenue recognition criteria are met. Deferred revenue is comprised of contractual billings in excess of recognized revenue and payments received in advance of revenue recognition.
	Cost of Revenue—Cost of revenue consists primarily of media cost for advertising impressions purchased from real-time advertising exchanges and other third parties. Cost of revenue also includes third-party data center costs and the salaries and related costs of the Company’s operations group. This group sets up, initiates and monitors the Company’s advertising campaigns. In addition, depreciation of the data center equipment, rental payments to third-party vendors for data centers and amortization of capitalized internal-use software are included in cost of revenue.
Research and Development—Research and development expenses include costs associated with the maintenance and ongoing development of the Company’s technology, including compensation and employee benefits and allocated costs associated with the Company’s engineering and research and development departments, as well as costs for contracted services and supplies. Allocated costs include charges for facilities, office expenses, telephones, and other miscellaneous expenses. The Company reviews costs incurred in the application development stage and assesses such costs for potential capitalization.
Sales and Marketing—Sales and marketing expenses consist primarily of compensation (including commissions) and employee benefits of sales and marketing personnel and related support teams, allocated costs, certain advertising costs, travel, trade shows and marketing materials. Allocated costs include charges for facilities, office expenses, telephones, and other miscellaneous expenses. The Company incurred advertising costs of $1.5 million and $1.6 million for the three months ended September 30, 2014 and 2013, respectively, and $4.5 million and $3.3 million for the nine months ended September 30, 2014 and 2013, respectively.
General and Administrative—General and administrative expenses include facilities costs, executive and administrative compensation and employee benefits, depreciation, professional services fees, insurance costs, bad debt and other allocated costs, such as facility-related expenses, supplies and other fixed costs. Allocated costs include charges for facilities, office expenses, telephones, and other miscellaneous expenses.
Stock-based Compensation—The Company measures compensation expense for all stock-based payment awards, including stock options granted to employees, based on the estimated fair value of the awards on the date of the grant. The fair value of each stock option granted is estimated using the Black-Scholes option pricing model. Stock-based compensation is recognized on a straight-line basis over the requisite vesting period, net of estimated forfeitures. The forfeiture rate is based on an analysis of the Company’s actual historical forfeitures.
The Company accounts for stock options issued to non-employees based on the fair value of the awards determined using the Black-Scholes option pricing model.
Preferred Stock Warrant Liability—Freestanding warrants related to shares that are redeemable or contingently redeemable were classified as a liability on the Company’s condensed consolidated balance sheet. The fully-vested convertible preferred stock warrants were subject to re-measurement at each balance sheet date, and any change in fair value is recognized as a component of other expense, net. As completion of the Company’s initial public offering constituted a liquidation event, the convertible preferred stock warrants were converted into common stock or warrants to purchase common stock, and the liability was reclassified to additional paid-in capital in the third quarter of 2013.
Income Taxes—The Company accounts for income taxes using an asset and liability approach. Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Operating loss and tax credit carry-forwards are measured by applying currently enacted tax laws. Valuation allowances are provided when necessary to reduce net deferred tax assets to an amount that is more likely than not to be realized.
The Company recognizes the tax effects of an uncertain tax position only if it is more likely than not to be sustained based solely on its technical merits as of the reporting date, and then, only in an amount more likely than not to be sustained upon review by the tax authorities. The Company considers many factors when evaluating and estimating its tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes.
Recently Issued and Adopted Accounting Pronouncements—Under the Jumpstart Our Business Startups Act (the "JOBS Act"), we qualify as an “emerging growth company.” We have irrevocably elected to opt out of the extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act, and, therefore, we will be subject to the same new or revised accounting standards as other public companies that are not “emerging growth companies.”
In May 2014, the FASB issued new accounting guidance related to revenue recognition. This new standard will replace all current U.S. GAAP guidance on this topic and eliminate all industry-specific guidance. The new revenue recognition standard provides a unified model to determine when and how revenue is recognized. The core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. This guidance will be effective beginning January 1, 2017 and can be applied either retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption. We have not yet determined if we will apply this new accounting standard retrospectively or as a cumulative-effect adjustment and are in the process of evaluating the impact of adopting this standard on our financial statements.
In August 2014, the FASB issued new guidance related to management responsibility to assess and provide related disclosure of the Company’s ability to continue as a going concern. This ASU will be effective for annual periods ending after December 15, 2016. The adoption of this guidance will not have a material impact on the Company's consolidated financial statements.

FAIR_VALUE_MEASUREMENTS

FAIR VALUE MEASUREMENTS	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
FAIR VALUE MEASUREMENTS	'
	NOTE 2.	FAIR VALUE MEASUREMENTS
	Fair value is defined as the price that would be received on the sale of an asset or paid to transfer a liability (exit price) in an orderly transaction between market participants at the measurement date. The FASB has established a fair value hierarchy that distinguishes between (1) market participant assumptions developed based on market data obtained from independent sources (observable inputs) and (2) an entity’s own assumptions about market participant assumptions developed based on the best information available in the circumstances (unobservable inputs). The fair value hierarchy consists of three broad levels, which gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3).
	The three levels of the fair value hierarchy under the guidance for fair value measurement are described below:
	Level 1	Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. Pricing inputs are based upon quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. For securities, the valuations are based on quoted prices of the security that are readily and regularly available in an active market, and accordingly, a significant degree of judgment is not required. As of September 30, 2014 and December 31, 2013, the Company used Level 1 assumptions for its money market funds.
	Level 2	Pricing inputs are based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or liabilities. As of September 30, 2014 and December 31, 2013, the Company did not have any Level 2 financial assets or liabilities.
	Level 3	Pricing inputs are generally unobservable for the assets or liabilities and include situations where there is little, if any, market activity for the investment. The inputs into the determination of fair value require management’s judgment or estimation of assumptions that market participants would use in pricing the assets or liabilities. The fair values are therefore determined using model-based techniques that include option pricing models, discounted cash flow models, and similar techniques. As of September 30, 2014 and December 31, 2013, the Company did not have any Level 3 financial assets or liabilities.
	The carrying amounts of cash equivalents, accounts receivable, prepaid expenses, accounts payable and accrued liabilities approximate fair value due to the short-term nature of these items. Based on the borrowing rates currently available to the Company for debt with similar terms, the carrying value of the capital lease, term debt and line of credit approximate fair value (using Level 2 inputs).
	The following tables set forth the Company’s financial instruments that were measured at fair value on a recurring basis as of September 30, 2014 and December 31, 2013, by level within the fair value hierarchy. The Company’s assessment of the significance of a particular input to the fair value measurement requires management to make judgments and consider factors specific to the asset or liability. The Company’s fair value hierarchy for its financial assets and financial liabilities that are carried at fair value are as follows (in thousands):
	30-Sep-14		Fair Value		Level 1		Level 2		Level 3
	Money market funds (included in cash and cash equivalents)		$	22,903	$	22,903	$	—	$	—
	31-Dec-13		Fair Value		Level 1		Level 2		Level 3
	Money market funds (included in cash and cash equivalents)		$	2,900	$	2,900	$	—	$	—

CASH_AND_CASH_EQUIVALENTS

CASH AND CASH EQUIVALENTS	9 Months Ended
	Sep. 30, 2014
Cash and Cash Equivalents [Abstract]	'
CASH AND CASH EQUIVALENTS	'
	NOTE 3.	CASH AND CASH EQUIVALENTS
	Cash and cash equivalents as of September 30, 2014 and December 31, 2013 consisted of the following (in thousands):
		September 30,		December 31,
		2014		2013
	Cash and cash equivalents:
	Cash	$	88,729	$	110,973
	Money market funds	22,903		2,900
	Total cash and cash equivalents	$	111,632	$	113,873

PROPERTY_EQUIPMENT_AND_SOFTWAR

PROPERTY, EQUIPMENT AND SOFTWARE, NET	9 Months Ended
	Sep. 30, 2014
Property, Plant and Equipment [Abstract]	'
PROPERTY, EQUIPMENT AND SOFTWARE, NET	'
	NOTE 4.	PROPERTY, EQUIPMENT AND SOFTWARE, NET
	Property, equipment and software, net as of September 30, 2014 and December 31, 2013, consisted of the following (in thousands):
		September 30,			December 31,
		2014			2013
	Capitalized internal-use software costs	$	20,672		$	14,030
	Computer hardware and software	35,328			17,077
	Furniture and fixtures	11,167			1,735
	Leasehold improvements	33,126			815
	Construction in progress	—			3,622
	Total	100,293			37,279
	Accumulated depreciation and amortization	(22,076		)	(11,485		)
	Total property, equipment and software, net	$	78,217		$	25,794
	Total depreciation and amortization expense, excluding amortization of internal-use software costs, was $3.2 million and $0.8 million for the three months ended September 30, 2014 and 2013, respectively, and $7.7 million and $2.1 million for the nine months ended September 30, 2014 and 2013, respectively. Amortization expense of internal-use software costs was $1.4 million and $0.9 million for the three months ended September 30, 2014 and 2013, respectively, and $3.7 million and $2.5 million for the nine months ended September 30, 2014 and 2013, respectively. Refer to Note 6 for details of the Company's capital leases as of September 30, 2014 and December 31, 2013.

BUSINESS_COMBINATIONS_BUSINESS

BUSINESS COMBINATIONS BUSINESS COMBINATIONS	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
BUSINESS COMBINATION	'
	NOTE 5.	BUSINESS COMBINATIONS
	On September 5, 2014, the Company acquired X Plus Two Solutions, Inc., a Delaware corporation (“X Plus Two”), which wholly owns X Plus One Solutions, Inc, known in the industry as [x+1] ("[x+1]"). The Company paid as consideration an aggregate of $98.0 million in cash and 5,253,084 shares of the Company’s common stock.
	Purchase consideration:
	Cash	$	98,045
	Fair value of 5,253,084 shares common stock transferred	82,421
	Total preliminary purchase price	$	180,466
	The acquisition of X Plus Two was accounted for in accordance with the acquisition method of accounting for business combinations with the Company as the accounting acquirer. The Company expensed the related acquisition costs in the amount of $4.7 million in general and administrative expenses. Under the acquisition method of accounting, the total purchase price as shown in the table above is allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values. The total purchase price was allocated using the information currently available. As a result, we may continue to adjust the preliminary estimated purchase price allocation after obtaining more information regarding asset valuations, liabilities assumed, and making any revisions of our preliminary estimates. The preliminary purchase price allocation of the estimated purchase consideration is as follows:
	Current assets	$	32,005
	Non-current assets	3,999
	Current liabilities	(28,893		)
	Non-current liabilities	(16,216		)
	Net acquired tangible assets	(9,105		)
	Identifiable intangible assets	74,700
	Goodwill	114,871
	Total preliminary purchase price	$	180,466
	The $114.9 million of goodwill is primarily attributable to synergies expected to be generated from combining the Company's and [x+1]’s technology and operations. None of the goodwill recorded as part of the acquisition will be deductible for U.S. federal income tax purposes.
	The preliminary estimated useful life and fair values of the identifiable intangible assets as of September 30, 2014 were as follows (in thousands):
								As of September 30, 2014
		Estimated Useful Life (in years)		Preliminary Fair Value				Accumulated Amortization				Net Book Value
				(in thousands)
	Developed technology	4-Mar		$	42,100			$	(805	)		$	41,295
	Customer relationships	8-Jul		27,700				(241		)		27,459
	Trademarks	5		2,000				(28		)		1,972
	Non-compete agreements	2		2,900				(100		)		2,800
	Total			$	74,700			(1,174		)		73,526
	Amortization expense of intangible assets for the three and nine months ended September 30, 2014 was $1.2 million. The expected annual amortization expense of intangible assets as of September 30, 2014 is presented below (in thousands):
	Year ending December 31,		Amortization
	2014 (remaining 3 months)		$	4,227
	2015		16,908
	2016		16,445
	2017		14,095
	2018		8,851
	2019 and thereafter		13,000
	Total		$	73,526
	The results of operations of X Plus Two have been included in the Company's consolidated statements of operations from the acquisition date. The following unaudited pro forma condensed combined financial information reflects the Company's condensed results of operations for the periods indicated and assumes that the business had been acquired at the beginning of fiscal year 2013 and includes pro forma adjustments. Direct and incremental transaction costs are excluded from the three and nine months ended September 30, 2014 pro forma condensed combined financial information presented below, and included in the three and nine months ended September 30, 2013. The unaudited pro forma results also include amortization associated with preliminary estimates for the acquired intangible assets and the associated tax impact on these unaudited pro forma adjustments. The tax benefit of $4.1 million that resulted from the acquisition is recorded in the three and nine months ended September 30, 2013. The pro forma condensed combined financial information is presented for informational purposes only and is not necessarily indicative of results that would have occurred had the acquisition taken place at the beginning of the earliest period presented, or of future results.
	Supplemental information on an unaudited pro forma basis, as if the acquisition had been consummated on January 1, 2013, is presented as follows (in thousands):
		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2014				2013				2014				2013
	Pro forma revenue	$	118,193			$	75,566			$	327,398			$	198,749
	Pro forma net loss	$	(28,970	)		$	(18,842	)		$	(63,578	)		$	(45,919	)

ACCRUED_AND_OTHER_CURRENT_LIAB

ACCRUED AND OTHER CURRENT LIABILITIES	9 Months Ended
	Sep. 30, 2014
Payables and Accruals [Abstract]	'
ACCRUED AND OTHER CURRENT LIABILITIES	'
	NOTE 6.	ACCRUED AND OTHER CURRENT LIABILITIES
	Accrued and other current liabilities as of September 30, 2014 and December 31, 2013 consisted of the following (in thousands):
		September 30,		December 31,
		2014		2013
	Payroll and related expenses	$	15,641	$	10,722
	Accrued vacation	385		2,220
	Professional services	645		650
	Accrued credit cards	971		774
	Early exercise of unvested stock options	404		1,107
	Employee stock purchase plan	2,181		1,427
	Acquisition-integration costs	1,475		—
	Fixed assets received, but unbilled	3,653		—
	Other accrued expenses	7,913		4,684
	Total accrued and other current liabilities	$	33,268	$	21,584

CAPITAL_LEASES

CAPITAL LEASES	9 Months Ended
	Sep. 30, 2014
Leases [Abstract]	'
CAPITAL LEASES	'
	NOTE 7.	CAPITAL LEASES
	Property and equipment at September 30, 2014 and December 31, 2013 included $8.5 million and $0.6 million, respectively, acquired under capital lease agreements of which the majority consists of computer hardware. There was $0.8 million and $0 of accumulated depreciation of property and equipment acquired under these capital leases at September 30, 2014 and December 31, 2013, respectively.
	The remaining future minimum lease payments under these non-cancelable capital leases as of September 30, 2014 were as follows (in thousands):
	Year ending December 31,		Future Payments
	2014 (remaining 3 months)		$	772
	2015		3,088
	2016		3,088
	2017		1,424
	Thereafter		—
	Total minimum lease payments		$	8,372
	Less: amount representing interest and taxes		(653		)
	Less: current portion of minimum lease payments		(2,695		)
	Capital lease obligations, net of current portion		$	5,024

OTHER_INCOME_EXPENSENET

OTHER INCOME (EXPENSE)—NET	9 Months Ended
	Sep. 30, 2014
Other Income and Expenses [Abstract]	'
OTHER INCOME (EXPENSE)—NET	'
	NOTE 8.	OTHER INCOME (EXPENSE)—NET
	Other income (expense)—net for the three and nine months ended September 30, 2014 and 2013, consisted of the following (in thousands):
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2014			2013		2014			2013
	Gain (loss) on foreign translation	$	(2,015	)	$	108	$	(2,476	)	$	(351	)
	Other non-operating income (loss), net	16			47		33			138
	Total other income (expense)—net	$	(1,999	)	$	155	$	(2,443	)	$	(213	)

DEBT

DEBT	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
DEBT	'
	NOTE 9.	DEBT
	Loan Facility—On December 20, 2013, the Company entered into an Amended and Restated Revolving Credit and Term Loan Agreement (the "Loan Facility") with certain lenders. Subsequently, the Company entered into a First Amendment to the Loan Facility on June 30, 2014 and a Second Amendment to the Loan Facility on October 31, 2014 to expand the credit facility and to adjust certain terms, definitions and covenants. The Loan Facility provides for an $80.0 million revolving credit facility, with a $12.0 million letter of credit subfacility, as amended from $5.0 million, and a $1.5 million swingline subfacility, and a $20.0 million secured term loan facility. The Loan Facility permits the Company, subject to certain requirements, to request an increase in the maximum revolving commitments under the Loan Facility by up to $25.0 million in additional revolving commitments. Revolving loans may be advanced under the Loan Facility in amounts up to the lesser of the $80.0 million maximum and a borrowing base equal to 85% of the value of eligible accounts receivable. The borrowing base is subject to certain reserves and eligibility criteria. Letters of credit can be issued under the subfacility up to $12.0 million, provided that the aggregate amount of advances outstanding under the revolving facility, the subfacility and the swingline facility do not exceed the lesser of the $80.0 million maximum and the borrowing base amount. If at any time the aggregate amounts outstanding under the revolving facility, the letter of credit subfacility and the swingline facility exceed the lesser of the $80.0 million maximum and the borrowing base then in effect, then the Company must make a prepayment in an amount sufficient to eliminate the excess. Loan proceeds may be used for general corporate purposes. The Company may prepay revolving loans and term loans under the Loan Facility in whole or in part at any time without premium or penalty, subject to certain conditions.
	In September 2014, the Company drew $35.0 million on the revolving credit facility for a total $42.4 million balance outstanding as of September 30, 2014.
	Revolving loans bear interest, at the Company's option, at (i) a base rate determined pursuant to the terms of the Loan Facility, plus a spread of 1.75% to 2.50%, or (ii) a LIBOR rate determined pursuant to the terms of the Loan Facility, plus a spread of 2.75% to 3.50%. Term loans bear interest, at the Company's option, at (i) a base rate determined pursuant to the terms of the Loan Facility, plus a spread of 2.75% to 3.50%, or (ii) a LIBOR rate determined pursuant to the terms of the Loan Facility, plus a spread of 3.75% to 4.50%. In each case, the spread is based on the cash reflected on the Company's balance sheet for the preceding fiscal quarter. The base rate is determined by taking the greatest of (i) the prime rate announced by Comerica, (ii) the federal funds rate plus 1.0% and (iii) the daily adjusting LIBOR rate plus 1.0%. Interest is due and payable quarterly in arrears for base rate loans. Interest is due and payable at the end of an interest period (or at each three months interval in the case of loans with interest periods greater than three months) for LIBOR rate loans.
	The Company is required to maintain certain financial covenants under the Loan Facility, including the following:
	EBITDA. The Company is required to maintain specified EBITDA, which is defined for this purpose, with respect to any trailing twelve month period, as an amount equal to the sum of (i) consolidated net income (loss) in accordance with GAAP, after eliminating all extraordinary nonrecurring items of income, plus (ii) depreciation and amortization, income tax expense; total interest expense paid or accrued; non-cash expenses or losses; stock-based compensation expense; costs and expenses from permitted acquisitions up to certain limits; costs and expenses in connection with the Loan Facility and any other expenses agreed with Comerica and the lenders; payroll-related expenses incurred in connection with the exercise of employee stock options up to certain limits; integration costs related to the [x+1] acquisition up to certain limits; less (iii) all extraordinary and non-recurring revenues and gains (including income tax benefits).
	Liquidity ratio. Under the Loan Facility, the ratio of (i) the sum of all cash on deposit with Comerica and certain other domestic financial institutions and the aggregate amount of all eligible accounts receivable to (ii) all indebtedness owing to the lender of the Loan Facility must be at least 1.10 to 1.00.
	The terms of the Loan Facility also require the Company to comply with certain other financial and non-financial covenants. As of September 30, 2014, the Company was out of compliance with one covenant, related to capital expenditure limits, for which a waiver was obtained. This limit was increased in the Second Amendment to the Loan Facility.
	Future Payments
	Future principal payments of long-term debt as of September 30, 2014 were as follows (in thousands):
	Year ending December 31,		Future Payments
	2014 (remaining 3 months)		$	—
	2015		5,000
	2016		5,000
	2017		5,000
	2018		5,000
	Total		20,000
	Less: current portion of long-term debt		(3,750		)
	Long-term debt, net of current portion		$	16,250
	As of September 30, 2014, the $42.4 million balance outstanding under the revolving credit facility had a maturity date of December 20, 2016, and because the Company has the option to draw upon the facility or repay borrowed funds at any time, the balance is shown as a current liability in the accompanying consolidated balance sheet. Additionally, the debt liabilities on the condensed consolidated balance sheet are net of $0.5 million in debt discounts.
	Additionally, $11.1 million of debt that was assumed with the acquisition of [x+1] was paid in full prior to September 30, 2014.

STOCKHOLDERS_EQUITY

STOCKHOLDERS' EQUITY	9 Months Ended
	Sep. 30, 2014
Stockholders' Equity Note [Abstract]	'
STOCKHOLDERS' EQUITY	'
	NOTE 10.	STOCKHOLDERS’ EQUITY
	In February 2014, the Company completed an underwritten follow-on public offering of its common stock in which 2,000,000 shares of common stock were sold by the Company and 3,000,000 shares of common stock were sold by selling stockholders. The public offering price of the shares sold in the offering was $61.00 per share. The Company did not receive any proceeds from the sale of shares by the selling stockholders. The total gross proceeds from the offering to the Company were $122.0 million. After deducting underwriters’ discounts and commissions and offering expenses, the aggregate net proceeds received by the Company totaled approximately $115.4 million.
	On September 5, 2014, the Company acquired X Plus Two, which wholly owns [x+1], for 5,253,084 shares of the Company’s common stock and $98.0 million in cash.
	Reserved Shares of Common Stock—The Company’s shares of capital stock reserved for issuance as of September 30, 2014 were as follows:
		30-Sep-14
	Options outstanding	6,716,267
	Restricted stock awards and units outstanding	977,005
	Available for future stock option and restricted stock unit grants	5,367,331
	Available for future employee stock purchase plan purchases	1,478,069
	Total shares reserved	14,538,672
	2008 Equity Incentive Plan—The 2008 Equity Incentive Plan (the “2008 Plan”) provides for the grant of incentive stock options and nonqualified stock options. The compensation committee of the Company's board of directors has the authority to approve the employees and non-employees to whom options are granted and determine the terms of each option, including (i) the number of shares of common stock subject to the option; (ii) when the option becomes exercisable; (iii) the option exercise price, which, in the case of incentive stock options, must be at least 100% of the fair market value of the common stock as of the date of grant; and (iv) the duration of the option (which, in the case of incentive stock options, may not exceed 10 years). Options granted under the 2008 Plan generally vest over four years and expire no later than 10 years from the date of grant. The Company has terminated the 2008 Plan for future use, and no further equity awards are to be granted under the 2008 Plan. All outstanding awards under the 2008 Plan will continue to be governed by their existing terms.
	Under the terms of the 2008 Plan, certain employees received the right to exercise unvested options. Upon termination of service, an employee’s unvested shares may be repurchased by the Company at the original purchase price. As of September 30, 2014 and December 31, 2013, 137,865 and 315,579 unvested shares, respectively, were subject to repurchase. During the nine months ended September 30, 2014 and year ended December 31, 2013, the Company repurchased 21,855 and 5,834 shares of unvested stock, respectively.
	2013 Equity Incentive Plan—Since its initial public offering in September 2013, the Company has made equity grants pursuant to its 2013 Equity Incentive Plan (the “2013 Plan”). The 2013 Plan permits the grant of incentive stock options, within the meaning of Section 422 of the Code, to the Company’s employees and any parent and subsidiary corporations’ employees, and the grant of nonstatutory stock options, restricted stock, restricted stock units, stock appreciation rights, performance units and performance shares to the Company’s employees, directors and consultants and the Company’s parent and subsidiary corporations’ employees and consultants.
	A total of 5,000,000 shares of common stock were reserved for issuance upon initial adoption of the 2013 Plan. In addition, the shares to be reserved for issuance under the 2013 Plan will also include shares subject to stock options or similar awards granted under the 2008 Plan that expire or terminate without having been exercised in full and shares issued pursuant to awards granted under the 2008 Plan that are forfeited to or repurchased by the Company (provided that the maximum number of shares that may be added to the 2013 Plan pursuant to this provision is 7,900,000 shares).
	The number of shares available for issuance under the 2013 Plan also includes an annual increase on the first day of each fiscal year equal to the least of (i) 4,000,000 shares; (ii) 5% of the outstanding shares of common stock as of the last day of the immediately preceding fiscal year; or (iii) such other amount as the Company’s board of directors may determine. Effective January 1, 2014, 1,641,299 shares were added to the shares reserved for issuance under the 2013 Plan according to the terms described above.
	The compensation committee of the board of directors has the authority to approve the employees and other service providers to whom equity awards are granted and to determine the terms of each award, subject to the terms of the 2013 Plan.  The compensation committee may determine the number of shares subject to an award, except that awards to non-employee members of the board of directors are determined under the Company's Outside Director Compensation Policy. Options and stock appreciation rights granted under the 2013 Plan must have a per share exercise price equal to at least 100% of the fair market value of a shares of the Company's common stock as of the date of grant and may not expire later than 10 years from the date of grant.
	The following tables summarize option award activity:
		Number of		Weighted-				Weighted-	Aggregate
		Shares		Average				Average	Intrinsic Value (in thousands)
		Outstanding		Exercise				Remaining
				Price				Contractual
								Life
								(Years)
	Balance at December 31, 2013	7,410,588		$	6.97			8.5	$	404,106
	Options granted (weighted average fair value of $23.40 per share)	537,908		43.15
	Options exercised	-959,588		2.81
	Options forfeited	-272,641		12.25
	Balance at September 30, 2014	6,716,267		$	10.24			7.9	$	54,427
	Options vested and expected to vest—September 30, 2014	6,383,874		$	9.86			7.9	$	52,879
	Options vested and exercisable—September 30, 2014	3,423,608		$	5.69			7.4	$	35,329
	Aggregate intrinsic value represents the difference between the Company’s estimated fair value of its common stock and the exercise price of outstanding in-the-money options. The total intrinsic value of options exercised was approximately $1.7 million and $9.5 million for the three months ended September 30, 2014 and 2013, respectively, and $29.7 million and $10.9 million for the nine months ended September 30, 2014 and 2013, respectively.
	Employee Stock-based Compensation—The fair value of options on the date of grant is estimated based on the Black-Scholes option-pricing model using the single-option award approach with the weighted-average assumptions set forth below. Expected term represents the period that the Company’s stock-based awards are expected to be outstanding and is determined based on the simplified method. Due to the lack of historical exercise activity for the Company, the simplified method calculates the expected term as the mid-point between the vesting date and the contractual expiration date of the award. Volatility is estimated using comparable public company volatility for similar option terms until a sufficient amount of historical information regarding the volatility of our own common stock share price becomes available. The risk-free interest rate is determined using a U.S. Treasury rate for the period that coincides with the expected term.
	As the Company has never paid cash dividends, and at present, has no intention to pay cash dividends in the future, expected dividends are zero. Expected forfeitures are based on the Company’s historical experience. The Company uses the straight-line method for expense recognition.
	The assumptions used to value stock-based awards granted to employees were as follows:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Expected term (years)	6.3		5.3–6.1		5.5–6.3		5.3–6.6
	Volatility	56.7%–57.6%		58.2%–59.1%		55.6%–58.0%		58.2%–64.9%
	Risk-free interest rate	1.84%		1.59%–1.73%		1.84%–1.97%		1.04%–1.88%
	Dividend yield	—		—		—		—
	As of September 30, 2014 and December 31, 2013, unamortized stock-based compensation expense related to unvested common stock options was $27.2 million and $21.7 million, respectively. The weighted-average period over which such stock-based compensation expense will be recognized is approximately 2.2 years.
	Restricted Stock Units ("RSUs") and Restricted Stock Awards ("RSAs")—A summary of RSU activity for the nine months ended September 30, 2014 is as follows:
		Number of Shares			Weighted Average Grant Date Fair Value
	Unvested at December 31, 2013	382,402			$	55.86
	Granted	718,112			30.2
	Vested and issued	(54,334	)		45.33
	Canceled	(69,175	)		44.99
	Unvested at September 30, 2014	977,005			$	38.35
	During the nine months ended September 30, 2014, the Company granted 4,000 RSAs with a weighted average grant date fair value of $16.67.
	The Company recognized stock-based compensation expense associated with RSUs and RSAs of $2.5 million and $0.1 million for the three months ended September 30, 2014 and 2013, respectively, and $6.5 million and $0.1 million for the nine months ended September 30, 2014 and 2013, respectively. At September 30, 2014, unrecognized compensation expense related to the RSUs and RSAs was $26.8 million. The unrecognized compensation expense will be amortized on a straight-line basis through 2018. The total fair value of RSUs and RSAs vested and issued during the three and nine months ended September 30, 2014 was $0.5 million and $1.2 million, respectively.
	Employee Stock Purchase Plan
	In August 2013, the Company’s board of directors adopted and the stockholders approved the Company’s 2013 Employee Stock Purchase Plan (the “ESPP”), which became effective upon adoption by the Company’s board of directors. The ESPP allows eligible employees to purchase shares of the Company’s common stock at a discount through payroll deductions of up to 15% of their eligible compensation, subject to any plan limitations. The offering periods generally start on the first trading day on or after June 1 and December 1 of each year and end on the first trading day on or before November 30 and May 31 approximately six months later. The administrator may, in its discretion, modify the terms of future offering periods. Due to the timing of the Company's initial public offering, the first offering period started on October 1, 2013 and ended on May 31, 2014.  At the end of each offering period, employees are able to purchase shares at 85% of the lower of the fair market value of the Company’s common stock on the first trading day of the offering period or on the last trading day of the offering period. As of September 30, 2014, total compensation costs related to rights to purchase shares of common stock under the ESPP offering period ending November 30, 2014, but not yet vested were approximately $1.7 million, which will be recognized over the offering period.
	The assumptions used to calculate our stock-based compensation for each stock purchase right granted under the ESPP were as follows:
		Three Months Ended		Nine Months Ended
		September 30, 2014		September 30, 2014
	Expected term (years)	0.5		0.5–0.7
	Volatility	77.40%		66.2%–77.4%
	Risk-free interest rate	0.06%		0.06%–0.07%
	Dividend yield	—		—
	Equity compensation allocation
	The following table summarizes the allocation of stock-based compensation in the accompanying condensed consolidated statements of operations (in thousands):
		Three Months Ended							Nine Months Ended
	September 30,							September 30,
	2014				2013			2014		2013
Cost of revenue	$	282			$	93		$	810	$	211
Research and development	1,279				506			3,577		1,266
Sales and marketing	2,683				1,152			7,598		2,471
General and administrative	1,685				902			4,900		2,305
Total	$	5,929			$	2,653		$	16,885	$	6,253

NET_INCOME_LOSS_PER_SHARE

NET INCOME (LOSS) PER SHARE	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
NET INCOME (LOSS) PER SHARE	'
	NOTE 11.	NET INCOME (LOSS) PER SHARE
	The Company calculates its basic and diluted net income (loss) per share attributable to common stockholders in conformity with the two-class method required for companies with participating securities. Under the two-class method, in periods when the Company has net income, net income attributable to common stockholders is determined by allocating undistributed earnings, calculated as net income less current period convertible preferred stock non-cumulative dividends, between common stock and convertible preferred stock. In computing diluted net income attributable to common stockholders, undistributed earnings are re-allocated to reflect the potential impact of dilutive securities. The Company’s basic net loss per share attributable to common stockholders is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding for the period. The diluted net loss per share attributable to common stockholders is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period. For purposes of this calculation, convertible preferred stock, options to purchase common stock and preferred stock warrants are considered common stock equivalents but have been excluded from the calculation of diluted net loss per share attributable to common stockholders as their effect is antidilutive.
	Basic loss per share is calculated by dividing net loss by the weighted-average number of shares of common stock outstanding during the period, less shares subject to repurchase, and excludes any dilutive effects of employee stock-based awards and warrants. Because the Company had net losses for the three and nine months ended September 30, 2014 and 2013, all potential shares of common stock were determined to be anti-dilutive.
	The following table sets forth the computation of net loss per share of common stock (in thousands, except per share amounts):
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
		2014				2013			2014			2013
	Net loss	$	(22,831	)		$	(6,860	)	$	(43,815	)	$	(18,771	)
	Weighted-average shares used to compute basic and diluted net loss per share	37,230				11,315			35,490			9,346
	Basic and diluted net loss per share	$	(0.61	)		$	(0.61	)	$	(1.23	)	$	(2.01	)
	The following securities were excluded from the calculation of diluted net loss per share attributable to common stockholders because their effect would have been anti-dilutive for the periods presented (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014		2013
	Employee stock options	6,716			7,405			6,716		7,405
	Shares subject to repurchase	138			380			138		380
	Restricted stock units (RSUs) and restricted stock awards (RSAs)	977			51			977		51
	Employee stock purchase plan	106			—			106		—
		7,937			7,836			7,937		7,836

INCOME_TAXES

INCOME TAXES	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
INCOME TAXES	'
	NOTE 12.	INCOME TAXES
	The Company is subject to income tax in the United States as well as other tax jurisdictions in which it conducts business.  Earnings from non-U.S. activities are subject to local country income tax. The Company does not provide for federal income taxes on the undistributed earnings of its foreign subsidiaries as such earnings are to be reinvested indefinitely.
	The Company recorded an income tax benefit of $4.1 million and income tax provision of $0.1 million for the three months ended September 30, 2014 and 2013, respectively. The Company recorded an income tax benefit of $3.6 million and income tax provision of $0.2 million for the nine months ended September 30, 2014 and 2013, respectively. The tax benefit for the three and nine months ended September 30, 2014 is primarily due to a partial release of valuation allowance against the Company’s deferred tax assets limited to the amount of the net deferred tax liabilities generated from intangibles acquired from the [x+1] acquisition, partially offset by provisions for foreign and state income taxes. The tax expense for the three and nine months ended September 30, 2013 is primarily due to foreign and state income tax expense.
	The following table presents the components of the benefit (provision) for income taxes (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Federal	$	4,031		$	—		$	4,031		$	—
	State	(2		)	5			(2		)	1
	Foreign	91			(138		)	(404		)	(174		)
	Total benefit (provision) for income taxes	$	4,120		$	(133	)	$	3,625		$	(173	)
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. In connection with the acquisition of [x+1], the Company recorded $5.1 million of net deferred tax liabilities related to the intangible assets less deferred tax assets from net operating losses and research and development tax credits of the acquired entity.
	Due to uncertainty as to the realization of benefits from deferred tax assets, including net operating loss carry-forwards, research and development and other tax credits, the Company maintains a valuation allowance reserved against the balance of such assets as of September 30, 2014.

COMMITMENTS_AND_CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
COMMITMENTS AND CONTINGENCIES	'
	NOTE 13.	COMMITMENTS AND CONTINGENCIES
	Operating Leases—The Company has operating lease agreements for office space for administration, research and development and sales and marketing activities in the United States that expire at various dates, with the latest expiration date in 2025.
	The Company recognizes rent expense on a straight-line basis over the lease term and records the difference between cash rent payments and the recognition of rent expense as a deferred rent liability. Rent expense was $3.9 million and $1.0 million for the three months ended September 30, 2014 and 2013, respectively, and $10.8 million and $2.5 million for the nine months ended September 30, 2014 and 2013, respectively.
	Approximate remaining future minimum lease payments under these non-cancelable operating leases as of September 30, 2014 were as follows (in thousands):
	Year ending December 31,		Future Payments
	2014 (remaining 3 months)		$	2,731
	2015		17,087
	2016		20,260
	2017		19,770
	2018		18,479
	Thereafter		65,951
			$	144,278
	Please refer to Note 6 for details of the Company's capital lease commitments as of September 30, 2014 and December 31, 2013.
	Letters of Credit Bank Guarantees and Restricted Cash—As of September 30, 2014 and December 31, 2013, the Company had irrevocable letters of credit outstanding in the amount of $6.2 million and $3.4 million, respectively, for facilities leases. The letters of credit have various expiration dates, with the latest being June 2025.
	As of September 30, 2014, the Company had $3.0 million reserved to support bank guarantees for certain office lease agreements. These amounts are classified as restricted cash on the Company's condensed consolidated balance sheets.
	Indemnification Agreements—In the ordinary course of business, the Company enters into agreements providing for indemnification of varying scope and terms to customers, vendors, lessors, business partners, and other parties with respect to certain matters, including, but not limited to, losses arising out of breach of such agreements, services to be provided by the Company or from intellectual property infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with directors and certain officers and employees that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors, officers or employees. No demands have been made upon the Company to provide indemnification under such agreements, and thus there are no claims that the Company is aware of that could have a material effect on the Company’s condensed consolidated balance sheets, condensed consolidated statements of operations, condensed consolidated statements of comprehensive loss, or condensed consolidated statements of cash flows.
	Legal Proceedings—The Company is involved from time to time in claims, proceedings, and litigation, including the following:
	On September 3, 2014 and September 10, 2014, respectively, two purported class actions were filed in the Northern District of California against the Company and certain of the Company’s officers and directors. The actions are Shah v. Rocket Fuel Inc., et al., Case No. 4:14-cv-03998, and Mehrotra v. Rocket Fuel Inc., et al., Case No. 4:14-cv-04114. The underwriters of the Company’s initial public offering on September 19, 2013 (the “IPO”) and its secondary offering on February 5, 2013 (the “Secondary Offering”) are also named as defendants. The complaints allege that the defendants made false and misleading statements about the ability of the Company’s technology to detect and eliminate fraudulent web traffic, and about the Company's future prospects. The complaints also allege that the Company’s registration statements and prospectuses for the IPO and the Secondary Offering contained false and misleading statements on these topics. The complaints purport to assert claims for violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and SEC Rule 10b-5, and for violations of Sections 11 and 15 of the Securities Act of 1933, on behalf of those who purchased the Company’s common stock between September 20, 2013 and August 5, 2014, inclusive, as well as those who purchased stock in the Company’s initial public offering on September 19, 2013. The Mehrotra complaint also purports to assert a claim for violation of Section 12(a)(2) of the Securities Act of 1933. The complaints seek monetary damages in an unspecified amount.
	The outcomes of the Company's legal proceedings are inherently unpredictable, subject to significant uncertainties, and could be material to its operating results and cash flows for a particular period.
	Legal fees are expensed in the period in which they are incurred.

RETIREMENT_PLANS

RETIREMENT PLANS	9 Months Ended
	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
RETIREMENT PLANS	'
	NOTE 14.	RETIREMENT PLANS
	The Company has established a 401(k) plan to provide tax deferred salary deductions for all eligible employees. Participants may make voluntary contributions to the 401(k) plan, limited by certain Internal Revenue Service restrictions. The Company is responsible for the administrative costs of the 401(k) plan. The Company does not match employee contributions.

SEGMENTS

SEGMENTS	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
SEGMENTS	'
	NOTE 15.	SEGMENTS
	The Company considers operating segments to be components of the Company's business for which separate financial information is available that is evaluated regularly by the Company’s chief operating decision maker in deciding how to allocate resources and in assessing performance. The chief operating decision maker for the Company is the Chief Executive Officer. The Chief Executive Officer reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. The Company has one business activity, and there are no segment managers who are held accountable for operations, operating results or plans for levels or components below the consolidated unit level. Accordingly, the Company has determined that it has a single operating and reportable segment.
	The following table summarizes total revenue generated through sales personnel located in the respective locations (in thousands):
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	North America	$	85,948	$	56,578	$	226,519	$	137,824
	All Other Countries	16,150		5,880		42,618		17,215
	Total revenue	$	102,098	$	62,458	$	269,137	$	155,039
	The following table summarizes total long-lived assets in the respective locations (in thousands):
		September 30,		December 31,
		2014		2013
	North America	$	73,263	$	23,956
	All Other Countries	4,954		1,838
	Total long-lived assets	$	78,217	$	25,794
	As of September 30, 2014, three agency holding companies and no single advertiser accounted for 10% of more of accounts receivable. As of December 31, 2013, no single agency holding company or advertiser accounted for 10% or more of accounts receivable.
	With respect to revenue concentration, the Company defines a customer as an advertiser that is a distinct source of revenue and is legally bound to pay for the advertising services that the Company delivers on the advertiser’s behalf. The Company counts all advertisers within a single corporate structure as one customer even in cases where multiple brands, branches or divisions of an organization enter into separate contracts with the Company. During the three and nine months ended September 30, 2014 and 2013, no single customer represented 10% or more of revenue.
	The Company also monitors the percentage of revenue that flows through advertising agencies, even though advertising agencies that act on behalf of the Company’s advertisers are not considered customers based on the definition above. If all branches and divisions within each global advertising agency were considered to be a single agency for this purpose, three agency holding companies would have been associated with 10% or more of revenue during the three and nine months ended September 30, 2014, and two agency holding companies would have been associated with 10% or more of revenue during the three and nine months ended September 30, 2013.

SUBSEQUENT_EVENTS

SUBSEQUENT EVENTS	9 Months Ended
	Sep. 30, 2014
Subsequent Events [Abstract]	'
SUBSEQUENT EVENTS	'
	NOTE 16.	SUBSEQUENT EVENTS
	No subsequent events have occurred that would require adjustment to the financial statements or disclosures included in the financial statements.

NATURE_OF_BUSINESS_AND_SUMMARY1

NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Principles of Consolidation	'
	Principles of Consolidation—The consolidated financial statements include the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation.
Use of Estimates	'
	Use of Estimates—The preparation of unaudited condensed consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Such estimates include, but are not limited to, provisions for doubtful accounts, the amount of software development costs which should be capitalized, future taxable income, the useful lives of long-lived assets and the assumptions used for purposes of determining stock-based compensation. Actual results could differ from those estimates.
Foreign Currency Translation	'
	Foreign Currency Translation—The Company’s foreign subsidiaries record their assets, liabilities and results of operations in their local currencies, which are their functional currencies. The Company translates its subsidiaries' consolidated financial statements into U.S. dollars each reporting period for purposes of consolidation.
	Assets and liabilities of the Company’s foreign subsidiaries are translated at the period-end currency exchange rates, certain equity accounts are translated at historical exchange rates and revenue, expenses, gains and losses are translated at the average currency exchange rates in effect for the period. The effects of these translation adjustments are reported in a separate component of stockholders’ equity titled accumulated other comprehensive income (loss).
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments—The Company’s financial instruments consist principally of cash equivalents, accounts receivable, accounts payable, accrued liabilities, capital leases, term debt and revolving credit facilities. The fair value of the Company’s cash equivalents is determined based on quoted prices in active markets for identical assets for its money market funds. The recorded values of the Company’s accounts receivable, accounts payable and accrued liabilities approximate their current fair values due to the relatively short-term nature of these accounts. The Company believes that the fair value of the capital leases, term debt and revolving credit facilities approximates its recorded amount as of September 30, 2014 as the interest rates on the term debt and revolving credit facilities are variable and the rates for each are based on market interest rates after consideration of default and credit risk.
Cash and Cash Equivalents & Restricted Cash	'
	Cash and Cash Equivalents—Cash consists of cash maintained in checking and savings accounts. All highly liquid investments purchased with an original maturity date of 90 days or less at the date of purchase are considered to be cash equivalents. Cash equivalents consist of money market funds.
	Restricted Cash—Restricted cash as of September 30, 2014 consists of cash required to be deposited with financial institutions for security deposits for some of the Company's office lease agreements.
Concentration of Credit Risk	'
	Concentration of Credit Risk—Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and accounts receivable. A significant portion of the Company’s cash is held at three major financial institutions that the Company's management has assessed to be of high credit quality. The Company has not experienced any losses in such accounts.
	The Company mitigates its credit risk with respect to accounts receivable by performing credit evaluations and monitoring agencies' and advertisers' accounts receivable balances. As of September 30, 2014, three agency holding companies and no single advertiser accounted for 10% of more of accounts receivable. As of December 31, 2013, no single agency holding company or advertiser accounted for 10% or more of accounts receivable.
	With respect to revenue concentration, the Company defines a customer as an advertiser that is a distinct source of revenue and is legally bound to pay for the advertising services that the Company delivers on the advertiser’s behalf. The Company counts all advertisers within a single corporate structure as one customer even in cases where multiple brands, branches or divisions of an organization enter into separate contracts with the Company. During the three and nine months ended September 30, 2014 and 2013, no single customer represented 10% or more of revenue.
	The Company also monitors the percentage of revenue that flows through advertising agencies, even though advertising agencies that act on behalf of the Company’s advertisers are not considered customers based on the definition above. If all branches and divisions within each global advertising agency were considered to be a single agency for this purpose, three agency holding companies would have been associated with 10% or more of revenue during the three and nine months ended September 30, 2014, and two agency holding companies would have been associated with 10% or more of revenue during the three and nine months ended September 30, 2013.
Provision for Doubtful Accounts	'
	Provision for Doubtful Accounts—The Company records a provision for doubtful accounts based on historical experience and a detailed assessment of the collectability of its accounts receivable. In estimating the allowance for doubtful accounts, management considers, among other factors, the aging of the accounts receivable, historical write-offs and the credit-worthiness of each customer. If circumstances change, such as higher-than-expected defaults or an unexpected material adverse change in a major customer’s ability to meet its financial obligations, the Company’s estimate of the recoverability of the amounts due could be reduced by a material amount.
Property and Equipment	'
	Property and Equipment—Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization is computed using the straight-line method over the estimated useful lives of the related assets. Maintenance and repairs are charged to expense as incurred, and improvements and betterments are capitalized. When assets are retired or otherwise disposed of, the cost and accumulated depreciation or amortization, as applicable, are removed from the balance sheet and any resulting gain or loss is reflected in operations in the period realized.
	Construction in progress primarily includes costs related to the leasehold improvements and also includes network equipment infrastructure to support the Company's data centers around the world. Interest capitalized during the periods presented was not material.
	Leasehold improvements are amortized on a straight-line basis over the term of the lease, or the useful life of the assets, whichever is shorter. Depreciation and amortization periods for the Company’s property and equipment are as follows:
	Asset Classification	Estimated Useful Life
	Computer hardware and purchased software	2–3 years
	Capitalized internal-use software costs	2–3 years
	Office equipment, furniture and fixtures	5 years
Internal Use Software Development Costs	'
	Internal-Use Software Development Costs—The Company incurs costs to develop software for internal use. The Company expenses all costs that relate to the planning and post implementation phases of development as research and development expense. The Company capitalizes costs when preliminary efforts are successfully completed, management has authorized and committed project funding, and it is probable that the project will be completed and will be used as intended. Costs incurred for enhancements that are expected to result in additional material functionality are capitalized. The Company capitalized $2.3 million and $1.7 million in internal-use software costs during the three months ended September 30, 2014 and 2013, respectively, and $6.6 million and $4.9 million for the nine months ended September 30, 2014 and 2013, respectively. These capitalized amounts are included in property, equipment and software—net on the condensed consolidated balance sheets.
	Amortization commences when the website or software for internal use is ready for its intended use and the amortization period is the estimated useful life of the related asset. Amortization expense totaled $1.4 million and $0.9 million for the three months ended September 30, 2014 and 2013, respectively, and $3.7 million and $2.5 million for the nine months ended September 30, 2014 and 2013, respectively.
Impairment of Long-lived Asset	'
	Impairment of Long-lived Assets—The Company periodically reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset is impaired or the estimated useful life is no longer appropriate. If indicators of impairment exist and the undiscounted projected cash flows associated with an asset are less than the carrying amount of the asset, an impairment loss is recorded to write the asset down to its estimated fair value. Fair value is estimated based on discounted future cash flows. No impairment charges were recorded during the three and nine months ended September 30, 2014 and 2013.
Business Combinations	'
	Business Combinations—The Company accounts for business combinations using the acquisition accounting method as required under the provisions of FASB ASC 805, Business Combinations, or ASC 805. The total purchase price is allocated to the assets acquired and liabilities assumed based on fair values at the date of acquisition.
Goodwill	'
	Goodwill, Intangibles and Impairment Assessments —Goodwill represents the excess of the aggregate purchase price paid over the fair value of the net tangible and intangible assets acquired. Intangible assets that are not considered to have an indefinite useful life are amortized over their useful lives. The Company evaluates the estimated remaining useful lives of purchased intangible assets and whether events or changes in circumstances warrant a revision to the remaining periods of amortization.
	Goodwill is not amortized and is tested for impairment at least annually or whenever events or changes in circumstances indicate that the carrying value may not be recoverable. The Company has determined that it operates as one reporting unit and has selected December 1 as the date to perform its annual impairment test.
	In the impairment assessment of its goodwill, the Company performs a qualitative assessment and then, if necessary, a two step impairment test, which involves assumptions regarding estimated future cash flows to be derived from the Company. If these estimates or their related assumptions change in the future, the Company may be required to record impairment for these assets. The first step of the impairment test involves comparing the fair value of the reporting unit to its net book value, including goodwill. If the net book value exceeds its fair value, then the Company would perform the second step of the goodwill impairment test to determine the amount of the impairment loss. The impairment loss would be calculated by comparing the implied fair value of the Company to its net book value. In calculating the implied fair value of the Company’s goodwill, the fair value of the Company would be allocated to all of the other assets and liabilities based on their fair values. The excess of the fair value of the Company over the amount assigned to its other assets and liabilities is the implied fair value of goodwill. An impairment loss would be recognized when the carrying amount of goodwill exceeds its implied fair value. There has been no impairment of goodwill during the periods presented.
Revenue Recognition	'
	Revenue Recognition—To date, the Company has generated most of its revenue by delivering digital advertisements to Internet users through various channels, including display, mobile, social and video. This aspect of its business is referred to as a demand side platform, or “DSP.”
	The Company recognizes revenue when all four of the following criteria are met:
	•    Persuasive evidence of an arrangement exists,
	•    Delivery has occurred or a service has been provided,
	•    Customer fees are fixed or determinable, and
	•    Collection is reasonably assured.
	These revenue arrangements are generally evidenced by a fully-executed insertion order (“IO”). Generally, IOs state the number and type of advertising impressions (cost-per-thousand) to be delivered, the agreed upon rate for each delivered impression, and a fixed period of time for delivery.
	The Company determines collectability by performing ongoing credit evaluations and monitoring its customers’ accounts receivable balances. For new customers and their agents, which may be advertising agencies or other third parties, the Company performs a credit check with an independent credit agency and may check credit references to determine creditworthiness. The Company only recognizes revenue when collection is reasonably assured.
	In the normal course of business, the Company frequently contracts with advertising agencies on behalf of their advertiser clients. The determination of whether revenue from DSP arrangements should be reported on a gross or net basis is based on an assessment of whether the Company is acting as the principal or an agent in the transaction. In determining whether the Company acts as the principal or an agent, the Company follows the accounting guidance for principal-agent considerations. While none of the factors identified in this guidance is individually considered presumptive or determinative, because (a) the Company is the primary obligor and is responsible for (i) fulfilling the advertisement delivery, (ii) establishing the selling prices for delivery of the advertisements, (iii) selecting the media to fulfill the insertion order, and (iv) performing all billing and collection activities including retaining credit risk, and (b) the Company has the risk of fluctuating costs from its media vendors relative to fixed pricing negotiated with its customers and has discretion in selecting media vendors when fulfilling a customer’s campaign, the Company has concluded that it acts as the principal in the majority of these arrangements and therefore reports revenue earned and costs incurred on a gross basis.
	On occasion, the Company has offered customer incentive programs that provide rebates after achieving a specified level of advertising spending. The Company records reductions to revenue for estimated commitments related to these customer incentive programs. For transactions involving incentives, the Company recognizes revenue net of the estimated amount to be paid by rebate, provided that the rebate amount can be reasonably and reliably estimated and the other conditions for revenue recognition have been met. The Company’s policy requires that, if rebates cannot be reliably estimated, revenue is not recognized until reliable estimates can be made or the rebate program lapses.
	In addition to delivering internet advertising through its full-service DSP, the Company licenses a self-service version of its DSP technology platforms and its data management platform ("DMP") to agencies and advertisers for their own use. These arrangements do not provide the customer with the right to take possession of the software or platform. The Company also provides professional services to certain of its customers. Revenue from license agreements is recognized ratably over the license term. Professional services consist primarily of assisting these customers with on-site support, training and other consulting services. When professional services are not considered essential to the functionality of the software, revenue is recognized ratably over the service or related subscription term, whichever is longer, otherwise recognition is deferred until the services are completed.
Multiple-Element Arrangements	'
	Multiple-Element Arrangements—The Company enters into arrangements to sell advertising that includes different media placements or ad services that are delivered at the same time, or within close proximity of one another. The Company allocates arrangement consideration in multiple-deliverable revenue arrangements at the inception of an arrangement to all deliverables or those packages in which all components of the package are delivered at the same time, based on the relative selling price method in accordance with the selling price hierarchy, which includes: (1) vendor-specific objective evidence (“VSOE”), if available; (2) third-party evidence (“TPE”), if VSOE is not available; and (3) best estimate of selling price (“BESP”), if neither VSOE nor TPE is available.
	VSOE—The Company determines VSOE based on its historical pricing and discounting practices for the specific product or service when sold separately. In determining VSOE, the Company requires that a substantial majority of the stand-alone selling prices for these services fall within a reasonably narrow pricing range. The Company has not been able to establish VSOE for any of its advertising offerings.
	TPE—When VSOE cannot be established for deliverables in multiple element arrangements, the Company applies judgment with respect to whether it can establish a selling price based on TPE. TPE is determined based on competitor prices for similar deliverables when sold separately. Generally, the Company’s go-to-market strategy differs from that of its peers and its offerings contain a significant level of differentiation such that the comparable pricing of services cannot be obtained. Furthermore, the Company is unable to reliably determine the selling prices of similar competitor services on a stand-alone basis. As a result, the Company has not been able to establish selling price based on TPE.
	BESP—When it is unable to establish selling price using VSOE or TPE, the Company uses BESP in its allocation of arrangement consideration. The objective of BESP is to determine the price at which the Company would transact a sale if the service were sold on a stand-alone basis. BESP is generally used to allocate the selling price to deliverables in the Company’s multiple element arrangements. The Company determines BESP for deliverables by considering multiple factors, including, but not limited to, prices it charges for similar offerings, market conditions, competitive landscape and pricing practices. In particular, the Company reviews multiple data points to determine BESP, including price lists used by the Company’s sales team in pricing negotiations, historical average and median pricing achieved in prior contractual customer arrangements and input from the Company’s sales operation department regarding what it believes the deliverables could be sold for on a stand-alone basis. BESP is determined at an advertising unit level that is consistent with the Company’s underlying market strategy and stratified based on specific consideration of channel, geography, industry and size, as deemed necessary.
	The Company limits the amount of allocable arrangement consideration to amounts that are fixed or determinable and that are not contingent on future performance or future deliverables. The Company regularly reviews BESP. Changes in assumptions or judgments or changes to the elements in the arrangement could cause a material increase or decrease in the amount of revenue that the Company reports in a particular period.
	The Company recognizes the relative fair value of advertising services as they are delivered, assuming all other revenue recognition criteria are met. Deferred revenue is comprised of contractual billings in excess of recognized revenue and payments received in advance of revenue recognition.
Cost of Revenue	'
	Cost of Revenue—Cost of revenue consists primarily of media cost for advertising impressions purchased from real-time advertising exchanges and other third parties. Cost of revenue also includes third-party data center costs and the salaries and related costs of the Company’s operations group. This group sets up, initiates and monitors the Company’s advertising campaigns. In addition, depreciation of the data center equipment, rental payments to third-party vendors for data centers and amortization of capitalized internal-use software are included in cost of revenue.
Research and Development	'
	Research and Development—Research and development expenses include costs associated with the maintenance and ongoing development of the Company’s technology, including compensation and employee benefits and allocated costs associated with the Company’s engineering and research and development departments, as well as costs for contracted services and supplies. Allocated costs include charges for facilities, office expenses, telephones, and other miscellaneous expenses. The Company reviews costs incurred in the application development stage and assesses such costs for potential capitalization.
Sales and Marketing	'
	Sales and Marketing—Sales and marketing expenses consist primarily of compensation (including commissions) and employee benefits of sales and marketing personnel and related support teams, allocated costs, certain advertising costs, travel, trade shows and marketing materials. Allocated costs include charges for facilities, office expenses, telephones, and other miscellaneous expenses. The Company incurred advertising costs of $1.5 million and $1.6 million for the three months ended September 30, 2014 and 2013, respectively, and $4.5 million and $3.3 million for the nine months ended September 30, 2014 and 2013, respectively.
General and Administrative	'
	General and Administrative—General and administrative expenses include facilities costs, executive and administrative compensation and employee benefits, depreciation, professional services fees, insurance costs, bad debt and other allocated costs, such as facility-related expenses, supplies and other fixed costs. Allocated costs include charges for facilities, office expenses, telephones, and other miscellaneous expenses.
Stock-Based Compensation	'
	Stock-based Compensation—The Company measures compensation expense for all stock-based payment awards, including stock options granted to employees, based on the estimated fair value of the awards on the date of the grant. The fair value of each stock option granted is estimated using the Black-Scholes option pricing model. Stock-based compensation is recognized on a straight-line basis over the requisite vesting period, net of estimated forfeitures. The forfeiture rate is based on an analysis of the Company’s actual historical forfeitures.
	The Company accounts for stock options issued to non-employees based on the fair value of the awards determined using the Black-Scholes option pricing model.
Preferred Stock Warrant Liability	'
	Preferred Stock Warrant Liability—Freestanding warrants related to shares that are redeemable or contingently redeemable were classified as a liability on the Company’s condensed consolidated balance sheet. The fully-vested convertible preferred stock warrants were subject to re-measurement at each balance sheet date, and any change in fair value is recognized as a component of other expense, net. As completion of the Company’s initial public offering constituted a liquidation event, the convertible preferred stock warrants were converted into common stock or warrants to purchase common stock, and the liability was reclassified to additional paid-in capital in the third quarter of 2013.
Income Taxes	'
	Income Taxes—The Company accounts for income taxes using an asset and liability approach. Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Operating loss and tax credit carry-forwards are measured by applying currently enacted tax laws. Valuation allowances are provided when necessary to reduce net deferred tax assets to an amount that is more likely than not to be realized.
	The Company recognizes the tax effects of an uncertain tax position only if it is more likely than not to be sustained based solely on its technical merits as of the reporting date, and then, only in an amount more likely than not to be sustained upon review by the tax authorities. The Company considers many factors when evaluating and estimating its tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes.
Recently Issued and Adopted Accounting Pronouncements	'
	Recently Issued and Adopted Accounting Pronouncements—Under the Jumpstart Our Business Startups Act (the "JOBS Act"), we qualify as an “emerging growth company.” We have irrevocably elected to opt out of the extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act, and, therefore, we will be subject to the same new or revised accounting standards as other public companies that are not “emerging growth companies.”
	In May 2014, the FASB issued new accounting guidance related to revenue recognition. This new standard will replace all current U.S. GAAP guidance on this topic and eliminate all industry-specific guidance. The new revenue recognition standard provides a unified model to determine when and how revenue is recognized. The core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. This guidance will be effective beginning January 1, 2017 and can be applied either retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption. We have not yet determined if we will apply this new accounting standard retrospectively or as a cumulative-effect adjustment and are in the process of evaluating the impact of adopting this standard on our financial statements.
	In August 2014, the FASB issued new guidance related to management responsibility to assess and provide related disclosure of the Company’s ability to continue as a going concern. This ASU will be effective for annual periods ending after December 15, 2016. The adoption of this guidance will not have a material impact on the Company's consolidated financial statements.

NATURE_OF_BUSINESS_AND_SUMMARY2

NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	9 Months Ended
	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Schedule of changes in the allowance for doubtful accounts	'
	The following table presents the changes in the allowance for doubtful accounts (in thousands):
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014			2013
	Allowance for doubtful accounts:
	Balance, beginning of period	$	797	$	485	$	1,057		$	468
	Add: bad debt expense	53		505		254			521
	Less: write-offs, net of recoveries	271		18		(190		)	19
	Balance, end of period	$	1,121	$	1,008	$	1,121		$	1,008
Schedule of depreciation and amortization periods for the Company's property and equipment	'
	Depreciation and amortization periods for the Company’s property and equipment are as follows:
	Asset Classification	Estimated Useful Life
	Computer hardware and purchased software	2–3 years
	Capitalized internal-use software costs	2–3 years
	Office equipment, furniture and fixtures	5 years

FAIR_VALUE_MEASUREMENTS_Tables

FAIR VALUE MEASUREMENTS (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Company's fair value hierarchy for its financial assets and financial liabilities that are carried at fair value	'
	The Company’s fair value hierarchy for its financial assets and financial liabilities that are carried at fair value are as follows (in thousands):
	30-Sep-14	Fair Value		Level 1		Level 2		Level 3
	Money market funds (included in cash and cash equivalents)	$	22,903	$	22,903	$	—	$	—
	31-Dec-13	Fair Value		Level 1		Level 2		Level 3
	Money market funds (included in cash and cash equivalents)	$	2,900	$	2,900	$	—	$	—

CASH_AND_CASH_EQUIVALENTS_Tabl

CASH AND CASH EQUIVALENTS (Tables)	9 Months Ended
	Sep. 30, 2014
Cash and Cash Equivalents [Abstract]	'
Schedule of cash and cash equivalents	'
	Cash and cash equivalents as of September 30, 2014 and December 31, 2013 consisted of the following (in thousands):
		September 30,		December 31,
		2014		2013
	Cash and cash equivalents:
	Cash	$	88,729	$	110,973
	Money market funds	22,903		2,900
	Total cash and cash equivalents	$	111,632	$	113,873

PROPERTY_EQUIPMENT_AND_SOFTWAR1

PROPERTY, EQUIPMENT AND SOFTWARE, NET (Tables)	9 Months Ended
	Sep. 30, 2014
Property, Plant and Equipment [Abstract]	'
Schedule of property, equipment and software	'
	Property, equipment and software, net as of September 30, 2014 and December 31, 2013, consisted of the following (in thousands):
		September 30,			December 31,
		2014			2013
	Capitalized internal-use software costs	$	20,672		$	14,030
	Computer hardware and software	35,328			17,077
	Furniture and fixtures	11,167			1,735
	Leasehold improvements	33,126			815
	Construction in progress	—			3,622
	Total	100,293			37,279
	Accumulated depreciation and amortization	(22,076		)	(11,485		)
	Total property, equipment and software, net	$	78,217		$	25,794

BUSINESS_COMBINATIONS_BUSINESS1

BUSINESS COMBINATIONS BUSINESS COMBINATIONS (Tables)	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Schedule of Consideration For Business Acquisitions	'
	Purchase consideration:
	Cash	$	98,045
	Fair value of 5,253,084 shares common stock transferred	82,421
	Total preliminary purchase price	$	180,466
Schedule of Purchase Price Allocation	'
	The preliminary purchase price allocation of the estimated purchase consideration is as follows:
	Current assets	$	32,005
	Non-current assets	3,999
	Current liabilities	(28,893		)
	Non-current liabilities	(16,216		)
	Net acquired tangible assets	(9,105		)
	Identifiable intangible assets	74,700
	Goodwill	114,871
	Total preliminary purchase price	$	180,466
Schedule of Finite-Lived Intangible Assets	'
	The preliminary estimated useful life and fair values of the identifiable intangible assets as of September 30, 2014 were as follows (in thousands):
								As of September 30, 2014
		Estimated Useful Life (in years)		Preliminary Fair Value				Accumulated Amortization				Net Book Value
				(in thousands)
	Developed technology	4-Mar		$	42,100			$	(805	)		$	41,295
	Customer relationships	8-Jul		27,700				(241		)		27,459
	Trademarks	5		2,000				(28		)		1,972
	Non-compete agreements	2		2,900				(100		)		2,800
	Total			$	74,700			(1,174		)		73,526
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	'
	The expected annual amortization expense of intangible assets as of September 30, 2014 is presented below (in thousands):
	Year ending December 31,		Amortization
	2014 (remaining 3 months)		$	4,227
	2015		16,908
	2016		16,445
	2017		14,095
	2018		8,851
	2019 and thereafter		13,000
	Total		$	73,526
Pro Forma Information	'
	Supplemental information on an unaudited pro forma basis, as if the acquisition had been consummated on January 1, 2013, is presented as follows (in thousands):
		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2014				2013				2014				2013
	Pro forma revenue	$	118,193			$	75,566			$	327,398			$	198,749
	Pro forma net loss	$	(28,970	)		$	(18,842	)		$	(63,578	)		$	(45,919	)

ACCRUED_AND_OTHER_CURRENT_LIAB1

ACCRUED AND OTHER CURRENT LIABILITIES (Tables)	9 Months Ended
	Sep. 30, 2014
Payables and Accruals [Abstract]	'
Schedule of accrued and other current liabilities	'
	Accrued and other current liabilities as of September 30, 2014 and December 31, 2013 consisted of the following (in thousands):
		September 30,		December 31,
		2014		2013
	Payroll and related expenses	$	15,641	$	10,722
	Accrued vacation	385		2,220
	Professional services	645		650
	Accrued credit cards	971		774
	Early exercise of unvested stock options	404		1,107
	Employee stock purchase plan	2,181		1,427
	Acquisition-integration costs	1,475		—
	Fixed assets received, but unbilled	3,653		—
	Other accrued expenses	7,913		4,684
	Total accrued and other current liabilities	$	33,268	$	21,584

CAPITAL_LEASES_Tables

CAPITAL LEASES (Tables)	9 Months Ended
	Sep. 30, 2014
Leases [Abstract]	'
Schedule of approximate remaining future minimum lease payments under non-cancelable capital leases	'
	The remaining future minimum lease payments under these non-cancelable capital leases as of September 30, 2014 were as follows (in thousands):
	Year ending December 31,	Future Payments
	2014 (remaining 3 months)	$	772
	2015	3,088
	2016	3,088
	2017	1,424
	Thereafter	—
	Total minimum lease payments	$	8,372
	Less: amount representing interest and taxes	(653		)
	Less: current portion of minimum lease payments	(2,695		)
	Capital lease obligations, net of current portion	$	5,024

OTHER_INCOME_EXPENSENET_Tables

OTHER INCOME (EXPENSE)—NET (Tables)	9 Months Ended
	Sep. 30, 2014
Other Income and Expenses [Abstract]	'
Schedule of other income (expense), net	'
	Other income (expense)—net for the three and nine months ended September 30, 2014 and 2013, consisted of the following (in thousands):
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2014			2013		2014			2013
	Gain (loss) on foreign translation	$	(2,015	)	$	108	$	(2,476	)	$	(351	)
	Other non-operating income (loss), net	16			47		33			138
	Total other income (expense)—net	$	(1,999	)	$	155	$	(2,443	)	$	(213	)

DEBT_Tables

DEBT (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of future principal payments of long-term debt	'
	Future principal payments of long-term debt as of September 30, 2014 were as follows (in thousands):
	Year ending December 31,	Future Payments
	2014 (remaining 3 months)	$	—
	2015	5,000
	2016	5,000
	2017	5,000
	2018	5,000
	Total	20,000
	Less: current portion of long-term debt	(3,750		)
	Long-term debt, net of current portion	$	16,250

STOCKHOLDERS_EQUITY_Tables

STOCKHOLDERS' EQUITY (Tables)	9 Months Ended
	Sep. 30, 2014
Stockholders' Equity Note [Abstract]	'
Schedule of shares of common stock reserved for issuance	'
	The Company’s shares of capital stock reserved for issuance as of September 30, 2014 were as follows:
		30-Sep-14
	Options outstanding	6,716,267
	Restricted stock awards and units outstanding	977,005
	Available for future stock option and restricted stock unit grants	5,367,331
	Available for future employee stock purchase plan purchases	1,478,069
	Total shares reserved	14,538,672
Summary of option award activity	'
	The following tables summarize option award activity:
		Number of		Weighted-				Weighted-	Aggregate
		Shares		Average				Average	Intrinsic Value (in thousands)
		Outstanding		Exercise				Remaining
				Price				Contractual
								Life
								(Years)
	Balance at December 31, 2013	7,410,588		$	6.97			8.5	$	404,106
	Options granted (weighted average fair value of $23.40 per share)	537,908		43.15
	Options exercised	-959,588		2.81
	Options forfeited	-272,641		12.25
	Balance at September 30, 2014	6,716,267		$	10.24			7.9	$	54,427
	Options vested and expected to vest—September 30, 2014	6,383,874		$	9.86			7.9	$	52,879
	Options vested and exercisable—September 30, 2014	3,423,608		$	5.69			7.4	$	35,329
Schedule of assumptions used to value stock-based awards granted to employees	'
	The assumptions used to value stock-based awards granted to employees were as follows:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Expected term (years)	6.3		5.3–6.1		5.5–6.3		5.3–6.6
	Volatility	56.7%–57.6%		58.2%–59.1%		55.6%–58.0%		58.2%–64.9%
	Risk-free interest rate	1.84%		1.59%–1.73%		1.84%–1.97%		1.04%–1.88%
	Dividend yield	—		—		—		—
Summary of RSU activity	'
	Restricted Stock Units ("RSUs") and Restricted Stock Awards ("RSAs")—A summary of RSU activity for the nine months ended September 30, 2014 is as follows:
		Number of Shares			Weighted Average Grant Date Fair Value
	Unvested at December 31, 2013	382,402			$	55.86
	Granted	718,112			30.2
	Vested and issued	(54,334	)		45.33
	Canceled	(69,175	)		44.99
	Unvested at September 30, 2014	977,005			$	38.35
Schedule of assumptions used to calculate stock-based compensation for each stock purchase right granted under the ESPP	'
	The assumptions used to calculate our stock-based compensation for each stock purchase right granted under the ESPP were as follows:
		Three Months Ended		Nine Months Ended
		September 30, 2014		September 30, 2014
	Expected term (years)	0.5		0.5–0.7
	Volatility	77.40%		66.2%–77.4%
	Risk-free interest rate	0.06%		0.06%–0.07%
	Dividend yield	—		—
	Equity compensation allocation
	The following table summarizes the allocation of stock-based compensation in the accompanying condensed consolidated statements of operations (in thousands):
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
		2014				2013			2014		2013
	Cost of revenue	$	282			$	93		$	810	$	211
	Research and development	1,279				506			3,577		1,266
	Sales and marketing	2,683				1,152			7,598		2,471
	General and administrative	1,685				902			4,900		2,305
	Total	$	5,929			$	2,653		$	16,885	$	6,253

NET_INCOME_LOSS_PER_SHARE_Tabl

NET INCOME (LOSS) PER SHARE (Tables)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of computation of net loss per common share	'
	The following table sets forth the computation of net loss per share of common stock (in thousands, except per share amounts):
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
		2014				2013			2014			2013
	Net loss	$	(22,831	)		$	(6,860	)	$	(43,815	)	$	(18,771	)
	Weighted-average shares used to compute basic and diluted net loss per share	37,230				11,315			35,490			9,346
	Basic and diluted net loss per share	$	(0.61	)		$	(0.61	)	$	(1.23	)	$	(2.01	)
Schedule of anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders	'
	The following securities were excluded from the calculation of diluted net loss per share attributable to common stockholders because their effect would have been anti-dilutive for the periods presented (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014		2013
	Employee stock options	6,716			7,405			6,716		7,405
	Shares subject to repurchase	138			380			138		380
	Restricted stock units (RSUs) and restricted stock awards (RSAs)	977			51			977		51
	Employee stock purchase plan	106			—			106		—
		7,937			7,836			7,937		7,836

INCOME_TAXES_INCOME_TAXES_Tabl

INCOME TAXES INCOME TAXES (Tables)	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Schedule of Components of Income Tax Expense (Benefit)	'
	The following table presents the components of the benefit (provision) for income taxes (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Federal	$	4,031		$	—		$	4,031		$	—
	State	(2		)	5			(2		)	1
	Foreign	91			(138		)	(404		)	(174		)
	Total benefit (provision) for income taxes	$	4,120		$	(133	)	$	3,625		$	(173	)

COMMITMENTS_AND_CONTINGENCIES_

COMMITMENTS AND CONTINGENCIES (Tables)	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of future minimum lease payments under non-cancelable operating leases	'
	Approximate remaining future minimum lease payments under these non-cancelable operating leases as of September 30, 2014 were as follows (in thousands):
	Year ending December 31,	Future Payments
	2014 (remaining 3 months)	$	2,731
	2015	17,087
	2016	20,260
	2017	19,770
	2018	18,479
	Thereafter	65,951
		$	144,278

SEGMENTS_Tables

SEGMENTS (Tables)	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Schedule of total revenue generated through sales personnel located in the respective locations	'
	The following table summarizes total revenue generated through sales personnel located in the respective locations (in thousands):
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	North America	$	85,948	$	56,578	$	226,519	$	137,824
	All Other Countries	16,150		5,880		42,618		17,215
	Total revenue	$	102,098	$	62,458	$	269,137	$	155,039
Schedule of total long-lived assets in the respective locations	'
	The following table summarizes total long-lived assets in the respective locations (in thousands):
		September 30,		December 31,
		2014		2013
	North America	$	73,263	$	23,956
	All Other Countries	4,954		1,838
	Total long-lived assets	$	78,217	$	25,794

NATURE_OF_BUSINESS_AND_SUMMARY3

NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	1 Months Ended	9 Months Ended			1 Months Ended
	Feb. 28, 2014	Sep. 30, 2014	Sep. 30, 2013	Feb. 18, 2014	Sep. 30, 2013
					Initial Public Offering
Initial public offering	'	'	'	'	'
Sale of Stock, Number of Shares Issued in Transaction	'	'	'	'	4,000,000
Number of shares of common stock sold by the entity	2,000,000	'	'	'	'
Number of shares of common stock sold by selling stockholders	3,000,000	'	'	'	600,000
Issuance Price Per Share (in dollars per share)	'	'	'	$61	$29
Total gross proceeds from the offering	$122,000,000	'	'	'	$116,000,000
Aggregate net proceeds received from offering	$115,400,000	$116,510,000	$107,880,000	'	$103,300,000

NATURE_OF_BUSINESS_AND_SUMMARY4

NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2013

Cash

Accounts receivable

Accounts receivable

Accounts receivable

Accounts receivable

Revenue

Revenue

Revenue

Revenue

Revenue

Revenue

Revenue

Revenue

Credit concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

agency

advertiser

agency

advertiser

advertiser

agency

advertiser

agency

agency

advertiser

agency

advertiser

Concentration of credit risk

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of financial institutions where a significant portion of cash is held

'

'

'

'

3

'

'

'

'

'

'

'

'

'

'

'

'

Number of customers

'

'

'

'

'

3

0

0

0

0

2

0

2

3

0

2

0

Impairment of long-lived assets

'

'

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Changes in the allowance for doubtful accounts

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Balance, beginning of period

797,000

485,000

1,057,000

468,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Add: bad debt expense

53,000

505,000

254,000

521,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Less: write-offs, net of recoveries

271,000

18,000

-190,000

19,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Balance, end of period

$1,121,000

$1,008,000

$1,121,000

$1,008,000

'

'

'

'

'

'

'

'

'

'

'

'

'

NATURE_OF_BUSINESS_AND_SUMMARY5

NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Internal Use Software Development Costs	'	'	'	'
Internal-use software costs capitalized	$2,300,000	$1,700,000	$6,600,000	$4,900,000
Amortization expense	1,400,000	900,000	3,700,000	2,500,000
Impairment of Long-lived Assets	'	'	'	'
Impairment of long-lived assets	'	'	0	'
Revenue Recognition	'	'	'	'
Number of criteria's required to be met for revenue recognition	4	'	4	'
Sales and Marketing	'	'	'	'
Advertising costs	$1,500,000	$1,600,000	$4,500,000	$3,300,000
Computer hardware and purchased software | Minimum	'	'	'	'
Property and equipment	'	'	'	'
Estimated useful life	'	'	'2 years	'
Computer hardware and purchased software | Maximum	'	'	'	'
Property and equipment	'	'	'	'
Estimated useful life	'	'	'3 years	'
Capitalized internal-use software costs | Minimum	'	'	'	'
Property and equipment	'	'	'	'
Estimated useful life	'	'	'2 years	'
Capitalized internal-use software costs | Maximum	'	'	'	'
Property and equipment	'	'	'	'
Estimated useful life	'	'	'3 years	'
Office equipment, furniture and fixtures	'	'	'	'
Property and equipment	'	'	'	'
Estimated useful life	'	'	'5 years	'

FAIR_VALUE_MEASUREMENTS_Detail

FAIR VALUE MEASUREMENTS (Details) (Recurring, Money market funds (included in cash and cash equivalents), USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial assets	$22,903	$2,900
Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial assets	22,903	2,900
Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial assets	0	0
Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial assets	$0	$0

CASH_AND_CASH_EQUIVALENTS_Deta

CASH AND CASH EQUIVALENTS (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Cash and cash equivalents	'	'	'	'
Total cash and cash equivalents	$111,632	$113,873	$125,282	$14,896
Cash	'	'	'	'
Cash and cash equivalents	'	'	'	'
Total cash and cash equivalents	88,729	110,973	'	'
Money market funds	'	'	'	'
Cash and cash equivalents	'	'	'	'
Total cash and cash equivalents	$22,903	$2,900	'	'

PROPERTY_EQUIPMENT_AND_SOFTWAR2

PROPERTY, EQUIPMENT AND SOFTWARE, NET (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Property, equipment and software	'	'	'	'	'
Total	$100,293,000	'	$100,293,000	'	$37,279,000
Accumulated depreciation and amortization	-22,076,000	'	-22,076,000	'	-11,485,000
Total property, equipment and software, net	78,217,000	'	78,217,000	'	25,794,000
Depreciation and amortization expense, excluding amortization of internal use software costs	3,200,000	800,000	7,700,000	2,100,000	'
Amortization expense	1,400,000	900,000	3,700,000	2,500,000	'
Capital leases	8,500,000	'	8,500,000	'	600,000
Capitalized internal-use software costs	'	'	'	'	'
Property, equipment and software	'	'	'	'	'
Total	20,672,000	'	20,672,000	'	14,030,000
Computer hardware and software	'	'	'	'	'
Property, equipment and software	'	'	'	'	'
Total	35,328,000	'	35,328,000	'	17,077,000
Furniture and fixtures	'	'	'	'	'
Property, equipment and software	'	'	'	'	'
Total	11,167,000	'	11,167,000	'	1,735,000
Leasehold improvements	'	'	'	'	'
Property, equipment and software	'	'	'	'	'
Total	33,126,000	'	33,126,000	'	815,000
Construction in progress	'	'	'	'	'
Property, equipment and software	'	'	'	'	'
Total	$0	'	$0	'	$3,622,000

BUSINESS_COMBINATIONS_Narrativ

BUSINESS COMBINATIONS - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended			0 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 05, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 05, 2014	Sep. 05, 2014
						x Plus 1	x Plus 1	x Plus 1	x Plus 1	x Plus 1	x Plus 1
											General and administrative
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Cash payment	'	'	$98,000,000	'	'	$98,045,000	'	'	'	'	'
Shares issued	'	'	5,253,084	'	'	5,253,084	'	'	'	'	'
Fair value of 5,253,084 shares common stock transferred	'	'	'	'	'	'	'	'	'	82,421,000	'
Total preliminary purchase price	'	'	'	'	'	'	'	'	'	180,466,000	'
Acquisition costs	'	'	'	'	'	'	'	'	'	'	4,700,000
Goodwill	114,871,000	'	114,871,000	'	0	'	'	'	'	114,871,000	'
Amortization of intangible assets	'	'	'	'	'	'	1,174,000	1,174,000	'	'	'
Tax benefit	($4,120,000)	$133,000	($3,625,000)	$173,000	'	'	($4,120,000)	'	($4,120,000)	'	'

BUSINESS_COMBINATIONS_Schedule

BUSINESS COMBINATIONS - Schedule of Purchase Price Allocation (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 05, 2014
In Thousands, unless otherwise specified			x Plus 1
Business Acquisition [Line Items]	'	'	'
Current assets	'	'	$32,005
Non-current assets	'	'	3,999
Current liabilities	'	'	-28,893
Non-current liabilities	'	'	-16,216
Net acquired tangible assets	'	'	-9,105
Identifiable intangible assets	'	'	74,700
Goodwill	114,871	0	114,871
Total preliminary purchase price allocation	'	'	$180,466

BUSINESS_COMBINATIONS_Intangib

BUSINESS COMBINATIONS - Intangible Assets Acquired (Details) (x Plus 1, USD $)	0 Months Ended
In Thousands, unless otherwise specified	Sep. 05, 2014	Sep. 30, 2014
Business Acquisition [Line Items]	'	'
Preliminary Fair Value	$74,700	'
Accumulated Amortization	'	-1,174
Net Book Value	'	73,526
Developed technology	'	'
Business Acquisition [Line Items]	'	'
Preliminary Fair Value	42,100	'
Accumulated Amortization	'	-805
Net Book Value	'	41,295
Customer base	'	'
Business Acquisition [Line Items]	'	'
Preliminary Fair Value	27,700	'
Accumulated Amortization	'	-241
Net Book Value	'	27,459
Trademarks	'	'
Business Acquisition [Line Items]	'	'
Estimated Useful Life (in years)	'5 years	'
Preliminary Fair Value	2,000	'
Accumulated Amortization	'	-28
Net Book Value	'	1,972
Non-compete agreements	'	'
Business Acquisition [Line Items]	'	'
Estimated Useful Life (in years)	'2 years	'
Preliminary Fair Value	2,900	'
Accumulated Amortization	'	-100
Net Book Value	'	$2,800
Minimum | Developed technology	'	'
Business Acquisition [Line Items]	'	'
Estimated Useful Life (in years)	'3 years	'
Minimum | Customer base	'	'
Business Acquisition [Line Items]	'	'
Estimated Useful Life (in years)	'7 years	'
Maximum | Developed technology	'	'
Business Acquisition [Line Items]	'	'
Estimated Useful Life (in years)	'4 years	'
Maximum | Customer base	'	'
Business Acquisition [Line Items]	'	'
Estimated Useful Life (in years)	'8 years	'

BUSINESS_COMBINATIONS_Schedule1

BUSINESS COMBINATIONS - Schedule of Amortization Expense (Details) (USD $)	Sep. 30, 2014
In Thousands, unless otherwise specified
Business Combinations [Abstract]	'
2014 (remaining 3 months)	$4,227
2015	16,908
2016	16,445
2017	14,095
2018	8,851
2019 and thereafter	13,000
Total	$73,526

BUSINESS_COMBINATIONS_Pro_Form

BUSINESS COMBINATIONS - Pro Forma (Details) (x Plus 1, USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
x Plus 1	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Pro forma revenue	$118,193	$75,566	$327,398	$198,749
Pro forma net loss	($28,970)	($18,842)	($63,578)	($45,919)

ACCRUED_AND_OTHER_CURRENT_LIAB2

ACCRUED AND OTHER CURRENT LIABILITIES (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Payables and Accruals [Abstract]	'	'
Payroll and related expenses	$15,641	$10,722
Accrued vacation	385	2,220
Professional services	645	650
Accrued credit cards	971	774
Early exercise of unvested stock options	404	1,107
Employee stock purchase plan	2,181	1,427
Acquisition-integration costs	1,475	0
Fixed assets received, but unbilled	3,653	0
Other accrued expenses	7,913	4,684
Total accrued and other current liabilities	$33,268	$21,584

CAPITAL_LEASES_Details

CAPITAL LEASES (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Leases [Abstract]	'	'
Property and equipment acquired under capital lease agreements	$8,500,000	$600,000
Accumulated depreciation of property and equipment acquired under capital leases agreements	800,000	0
Approximate remaining future minimum lease payments under non-cancelable capital leases	'	'
2014 (remaining 3 months)	772,000	'
2015	3,088,000	'
2016	3,088,000	'
2017	1,424,000	'
Thereafter	0	'
Total minimum lease payments	8,372,000	'
Less: amount representing interest and taxes	-653,000	'
Less: current portion of minimum lease payments	-2,695,000	-203,000
Capital lease obligations, net of current portion	$5,024,000	$412,000

OTHER_INCOME_EXPENSENET_Detail

OTHER INCOME (EXPENSE)—NET (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other Income and Expenses [Abstract]	'	'	'	'
Gain (loss) on foreign translation	($2,015)	$108	($2,476)	($351)
Other non-operating income (loss), net	16	47	33	138
Total other income (expense)-net	($1,999)	$155	($2,443)	($213)

DEBT_Details

DEBT (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013
Debt	'	'	'
Additional revolving commitments	$25,000,000	$25,000,000	'
Proceeds from Lines of Credit	35,000,000	'	'
Liquidity ratio	1.1	1.1	'
Future principal payments of long-term debt	'	'	'
2014 (remaining 3 months)	0	0	'
2015	5,000,000	5,000,000	'
2016	5,000,000	5,000,000	'
2017	5,000,000	5,000,000	'
2018	5,000,000	5,000,000	'
Total	20,000,000	20,000,000	'
Long-term debt, net of current portion	15,965,000	15,965,000	19,568,000
Amount outstanding	42,400,000	42,400,000	'
Unamortized discounts	500,000	500,000	'
Repayments of assumed debt	'	11,100,000	'
Federal funds rate	'	'	'
Debt	'	'	'
Applicable margin over variable rate basis (as a percent)	'	1.00%	'
Daily adjusting LIBOR rate	'	'	'
Debt	'	'	'
Applicable margin over variable rate basis (as a percent)	'	1.00%	'
Revolving line of credit, as amended in June 2013	'	'	'
Debt	'	'	'
Maximum amount available for borrowing	80,000,000	80,000,000	'
Maximum amount available for borrowing expressed as a percentage of certain eligible accounts	85.00%	85.00%	'
Loan Facility	'	'	'
Debt	'	'	'
Period of interest only monthly installments	'	'3 months	'
Loan Facility | Minimum	'	'	'
Debt	'	'	'
Period of interest only monthly installments	'	'3 months	'
Revolving line of credit | Base rate	'	'	'
Debt	'	'	'
Applicable margin over variable rate basis (as a percent)	'	2.50%	'
Revolving line of credit | Minimum | Base rate	'	'	'
Debt	'	'	'
Applicable margin over variable rate basis (as a percent)	'	1.75%	'
Revolving line of credit | Minimum | LIBOR	'	'	'
Debt	'	'	'
Applicable margin over variable rate basis (as a percent)	'	2.75%	'
Revolving line of credit | Maximum | LIBOR	'	'	'
Debt	'	'	'
Applicable margin over variable rate basis (as a percent)	'	3.50%	'
Letter of credit subfacility	'	'	'
Debt	'	'	'
Maximum amount available for borrowing	12,000,000	12,000,000	'
Swing line subfacility	'	'	'
Debt	'	'	'
Maximum amount available for borrowing	1,500,000	1,500,000	'
Term loans	'	'	'
Future principal payments of long-term debt	'	'	'
Less: current portion of long-term debt	-3,750,000	-3,750,000	'
Long-term debt, net of current portion	16,250,000	16,250,000	'
Term loans | Minimum | Base rate	'	'	'
Debt	'	'	'
Applicable margin over variable rate basis (as a percent)	'	2.75%	'
Term loans | Minimum | LIBOR	'	'	'
Debt	'	'	'
Applicable margin over variable rate basis (as a percent)	'	3.75%	'
Term loans | Maximum | Base rate	'	'	'
Debt	'	'	'
Applicable margin over variable rate basis (as a percent)	'	3.50%	'
Term loans | Maximum | LIBOR	'	'	'
Debt	'	'	'
Applicable margin over variable rate basis (as a percent)	'	4.50%	'
Revolving line of credit amended in March 2012	'	'	'
Debt	'	'	'
Maximum amount available for borrowing	$20,000,000	$20,000,000	'

STOCKHOLDERS_EQUITY_Details

STOCKHOLDERS' EQUITY (Details) (USD $)	1 Months Ended	9 Months Ended
	Feb. 28, 2014	Sep. 30, 2014	Sep. 30, 2013	Feb. 18, 2014
STOCKHOLDERS' EQUITY (DEFICIT)	'	'	'	'
Number of shares of common stock sold by the entity	2,000,000	'	'	'
Number of shares of common stock sold by selling stockholders	3,000,000	'	'	'
Issuance Price Per Share (in dollars per share)	'	'	'	$61
Total gross proceeds from the offering	$122,000,000	'	'	'
Aggregate net proceeds received from offering	115,400,000	116,510,000	107,880,000	'
Shares of capital stock reserved for issuance	'	'	'	'
Total shares reserved	'	14,538,672	'	'
Stock Issued During Period, Shares, Acquisitions	'	5,253,084	'	'
Payments to Acquire Businesses, Gross	'	$98,000,000	'	'
Employee stock purchase plan	'	'	'	'
Shares of capital stock reserved for issuance	'	'	'	'
Total shares reserved	'	1,478,069	'	'
Options	'	'	'	'
Shares of capital stock reserved for issuance	'	'	'	'
Total shares reserved	'	6,716,267	'	'
Restricted stock units (RSUs)	'	'	'	'
Shares of capital stock reserved for issuance	'	'	'	'
Total shares reserved	'	977,005	'	'
Stock option and restricted stock unit grants	'	'	'	'
Shares of capital stock reserved for issuance	'	'	'	'
Total shares reserved	'	5,367,331	'	'

STOCKHOLDERS_EQUITY_Details_2

STOCKHOLDERS' EQUITY (Details 2) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014
Number of Shares Outstanding	'	'	'	'	'	'
Balance at the beginning of the period (in shares)	'	'	7,410,588	'	'	'
Options granted (weighted average fair value of $23.40 per share)	'	'	537,908	'	'	'
Options exercised (in shares)	'	'	-959,588	'	'	'
Options forfeited (in shares)	'	'	-272,641	'	'	'
Balance at the end of the period (in shares)	6,716,267	'	6,716,267	'	7,410,588	'
Options vested and expected to vest (in shares)	6,383,874	'	6,383,874	'	'	'
Options vested and exercisable (in shares)	3,423,608	'	3,423,608	'	'	'
Weighted average fair value (in dollars per share)	'	'	$23.40	'	'	'
Weighted-Average Exercise Price	'	'	'	'	'	'
Balance at the beginning of the period (in dollars per share)	'	'	$6.97	'	'	'
Options granted (weighted average fair value of $23.40 per share)	'	'	$43.15	'	'	'
Options exercised (in dollars per share)	'	'	$2.81	'	'	'
Options forfeited (in dollars per share)	'	'	$12.25	'	'	'
Balance at the end of the period (in dollars per share)	$10.24	'	$10.24	'	$6.97	'
Options vested and expected to vest (in dollars per share)	$9.86	'	$9.86	'	'	'
Options vested and exercisable (in dollars per share)	$5.69	'	$5.69	'	'	'
Weighted-Average Remaining Contractual Life	'	'	'	'	'	'
Balance	'	'	'7 years 10 months 20 days	'	'8 years 6 months	'
Options vested and expected to vest	'	'	'7 years 10 months 9 days	'	'	'
Options vested and exercisable	'	'	'7 years 4 months 24 days	'	'	'
Aggregate Intrinsic Value	'	'	'	'	'	'
Balance	'	'	$404,106,000	'	'	$54,427,000
Options vested and expected to vest	52,879,000	'	52,879,000	'	'	'
Options vested and exercisable	35,329,000	'	35,329,000	'	'	'
Total intrinsic value of options exercised	$1,700,000	$9,500,000	$29,700,000	$10,900,000	'	'
2008 Equity Incentive Plan	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Exercise price as a percentage of the fair market value of the common stock	'	'	100.00%	'	'	'
Expiration period	'	'	'10 years	'	'	'
Vesting period	'	'	'4 years	'	'	'
Number of shares of unvested stock repurchased	'	'	21,855	'	5,834	'
2013 Equity Incentive Plan	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Exercise price as a percentage of the fair market value of the common stock	'	'	100.00%	'	'	'
Expiration period	'	'	'10 years	'	'	'
Common stock reserved for issuance	5,000,000	'	5,000,000	'	'	'
Number of shares added to current plan for award granted but not exercised in full, pursuant to the terminated equity incentive plan	'	'	7,900,000	'	'	'
Annual increase in number of shares available for issuance on first day of each fiscal year following latest fiscal year	'	'	4,000,000	'	'	'
Annual increase in number of shares available for issuance on first day of each fiscal year following latest fiscal year as a percentage of outstanding common stock, as on last day of the immediately preceding fiscal year	'	'	5.00%	'	'	'
Additional shares authorized	'	'	1,641,299	'	'	'
Options | 2008 Equity Incentive Plan	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Number of unvested shares	137,865	'	137,865	'	315,579	137,865

STOCKHOLDERS_EQUITY_Details_3

STOCKHOLDERS' EQUITY (Details 3) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Summary of options outstanding and vested	'	'	'	'
Expected dividends	'	'	$0	'
Assumptions used to value stock-based awards granted to employees	'	'	'	'
Expected term	'6 years 3 months 18 days	'	'	'
Volatility, lower end (as a percent)	'	'	55.60%	58.20%
Volatility, higher end (as a percent)	'	'	58.00%	64.90%
Risk-free interest rate, lower end (as a percent)	1.84%	1.59%	1.84%	1.04%
Risk-free interest rate, higher end (as a percent)	'	1.73%	1.97%	1.88%
Dividend yield (as a percent)	0.00%	0.00%	0.00%	0.00%
Minimum	'	'	'	'
Assumptions used to value stock-based awards granted to employees	'	'	'	'
Expected term	'	'5 years 3 months 18 days	'5 years 6 months	'5 years 10 months 24 days
Volatility, lower end (as a percent)	56.70%	58.20%	'	'
Maximum	'	'	'	'
Assumptions used to value stock-based awards granted to employees	'	'	'	'
Expected term	'	'6 years 1 month 6 days	'6 years 3 months 18 days	'6 years 7 months 6 days
Volatility, lower end (as a percent)	'	59.10%	'	'
Volatility, higher end (as a percent)	57.60%	'	'	'
Employee stock purchase plan	'	'	'	'
Assumptions used to value stock-based awards granted to employees	'	'	'	'
Expected term	'6 months	'	'	'
Volatility (as a percent)	77.40%	'	'	'
Risk-free interest rate (as a percent)	0.06%	'	'	'
Dividend yield (as a percent)	0.00%	'	0.00%	'
Employee stock purchase plan | Minimum	'	'	'	'
Assumptions used to value stock-based awards granted to employees	'	'	'	'
Expected term	'	'	'6 months	'
Volatility (as a percent)	'	'	66.20%	'
Risk-free interest rate (as a percent)	'	'	0.06%	'
Employee stock purchase plan | Maximum	'	'	'	'
Assumptions used to value stock-based awards granted to employees	'	'	'	'
Expected term	'	'	'8 months 12 days	'
Volatility (as a percent)	'	'	77.40%	'
Risk-free interest rate (as a percent)	'	'	0.07%	'

STOCKHOLDERS_EQUITY_Details_4

STOCKHOLDERS' EQUITY (Details 4) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Stock option and restricted stock unit grants

Stock option and restricted stock unit grants

Stock option and restricted stock unit grants

Stock option and restricted stock unit grants

Options

Options

Cost of revenue

Cost of revenue

Cost of revenue

Cost of revenue

Research and development

Research and development

Research and development

Research and development

Sales and marketing

Sales and marketing

Sales and marketing

Sales and marketing

General and administrative

General and administrative

General and administrative

General and administrative

Allocation of stock-based compensation and restricted stock for employees and non-employees

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total

$5,929,000

$2,653,000

$16,885,000

$6,253,000

$2,500,000

$100,000

$6,500,000

$100,000

'

'

$282,000

$93,000

$810,000

$211,000

$1,279,000

$506,000

$3,577,000

$1,266,000

$2,683,000

$1,152,000

$7,598,000

$2,471,000

$1,685,000

$902,000

$4,900,000

$2,305,000

Unamortized stock-based compensation expense related to unvested common stock options

'

'

'

'

'

'

'

'

$27,200,000

$21,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted-average period over which stock-based compensation expense will be recognized

'

'

'

'

'

'

'

'

'2 years 2 months 19 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

STOCKHOLDERS_EQUITY_Details_5

STOCKHOLDERS' EQUITY (Details 5) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Options granted	'	'	537,908	'	'
Stock-based compensation expense	$5,929,000	$2,653,000	$16,885,000	$6,253,000	'
Options outstanding (in shares)	6,716,267	'	6,716,267	'	7,410,588
Assumptions used to calculate stock-based compensation for each stock purchase right granted under the Employee Stock Purchase Plan (ESPP)	'	'	'	'	'
Expected term	'6 years 3 months 18 days	'	'	'	'
Dividend yield (as a percent)	0.00%	0.00%	0.00%	0.00%	'
2008 Equity Incentive Plan	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Purchase price expressed as a percentage of fair market value of common stock on the first or the last trading day of the offering period	'	'	100.00%	'	'
2013 Equity Incentive Plan	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Purchase price expressed as a percentage of fair market value of common stock on the first or the last trading day of the offering period	'	'	100.00%	'	'
Employee stock purchase plan	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Percentage of deduction from eligible compensation authorized by employee to purchase common stock at discount	15.00%	'	15.00%	'	'
Purchase price expressed as a percentage of fair market value of common stock on the first or the last trading day of the offering period	'	'	85.00%	'	'
Total compensation costs related to rights to purchase common shares but not yet vested which will be recognized over the offering period	1,700,000	'	1,700,000	'	'
Assumptions used to calculate stock-based compensation for each stock purchase right granted under the Employee Stock Purchase Plan (ESPP)	'	'	'	'	'
Expected term	'6 months	'	'	'	'
Volatility (as a percent)	77.40%	'	'	'	'
Risk-free interest rate (as a percent)	0.06%	'	'	'	'
Dividend yield (as a percent)	0.00%	'	0.00%	'	'
Stock option and restricted stock unit grants	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Stock-based compensation expense	2,500,000	100,000	6,500,000	100,000	'
Restricted Stock	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Number of awards issued (in shares)	'	'	4,000	'	'
Granted	'	'	$16.67	'	'
Restricted Stock Units (RSUs)	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Number of awards issued (in shares)	'	'	718,112	'	'
Granted	'	'	$30.20	'	'
Number of awards released (in shares)	'	'	54,334	'	'
Number of awards cancelled (in shares)	'	'	69,175	'	'
Unrecognized compensation expense	$26,800,000	'	$26,800,000	'	'

STOCKHOLDERS_EQUITY_Details_6

STOCKHOLDERS' EQUITY (Details 6) (Restricted stock units (RSUs), USD $)	3 Months Ended	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014
Restricted stock units (RSUs)	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$0.50	$1.20
Number of Shares	'	'
Unvested, beginning balance	'	382,402
Granted	'	718,112
Vested and issued	'	-54,334
Canceled	'	-69,175
Unvested, ending balance	977,005	977,005
Weighted Average Grant Date Fair Value	'	'
Unvested, beginning balance	'	$55.86
Granted	'	$30.20
Vested and issued	'	$45.33
Canceled	'	$44.99
Unvested, ending balance	$38.35	$38.35

NET_INCOME_LOSS_PER_SHARE_Deta

NET INCOME (LOSS) PER SHARE (Details) (USD $)	3 Months Ended				6 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Computation of net loss per common share	'	'	'	'	'	'	'	'
Net loss	($22,831)	'	($6,860)	'	'	'	($43,815)	($18,771)
Weighted-average shares used to compute basic and diluted net loss per share	37,230	'	11,315	'	'	'	35,490	9,346
Basic and diluted net loss per share (in dollars per share)	($0.61)	'	($0.61)	'	'	'	($1.23)	($2.01)
Anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders	'	'	'	'	'	'	'	'
Anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders (in shares)	'	7,937	'	7,836	7,937	7,836	'	'
Employee stock options	'	'	'	'	'	'	'	'
Anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders	'	'	'	'	'	'	'	'
Anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders (in shares)	'	6,716	'	7,405	6,716	7,405	'	'
Shares subject to repurchase	'	'	'	'	'	'	'	'
Anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders	'	'	'	'	'	'	'	'
Anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders (in shares)	'	138	'	380	138	380	'	'
Restricted stock units (RSUs)	'	'	'	'	'	'	'	'
Anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders	'	'	'	'	'	'	'	'
Anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders (in shares)	'	977	'	51	977	51	'	'
Restricted Stock	'	'	'	'	'	'	'	'
Anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders	'	'	'	'	'	'	'	'
Anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders (in shares)	'	4	'	0	4	0	'	'
Employee stock purchase plan	'	'	'	'	'	'	'	'
Anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders	'	'	'	'	'	'	'	'
Anti-dilutive securities that were excluded from the calculation of diluted net loss per share attributable to common stockholders (in shares)	'	106	'	0	106	0	'	'

INCOME_TAXES_Details

INCOME TAXES (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Examination [Line Items]	'	'	'	'
Income tax benefit (provision)	$4,120,000	($133,000)	$3,625,000	($173,000)
Deferred tax liabilities related to acquisition	5,100,000	'	5,100,000	'
Federal	'	'	'	'
Income Tax Examination [Line Items]	'	'	'	'
Income tax benefit (provision)	4,031,000	0	4,031,000	0
State	'	'	'	'
Income Tax Examination [Line Items]	'	'	'	'
Income tax benefit (provision)	-2,000	5,000	-2,000	1,000
Foreign	'	'	'	'
Income Tax Examination [Line Items]	'	'	'	'
Income tax benefit (provision)	$91,000	($138,000)	($404,000)	($174,000)

COMMITMENTS_AND_CONTINGENCIES_1

COMMITMENTS AND CONTINGENCIES (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Dec. 31, 2013
Operating Leases	'	'	'	'	'	'
Rent expense	$3,900,000	$1,000,000	$10,800,000	$2,500,000	'	'
Future minimum lease payments under non-cancelable operating leases	'	'	'	'	'	'
2014 (remaining 9 months)	'	'	'	'	2,731,000	'
2015	'	'	'	'	17,087,000	'
2016	'	'	'	'	20,260,000	'
2017	'	'	'	'	19,770,000	'
2018	'	'	'	'	18,479,000	'
Thereafter	'	'	'	'	65,951,000	'
Total future payments	'	'	'	'	144,278,000	'
Letters of Credit and Bank Guarantees	'	'	'	'	'	'
Irrevocable letters of credit outstanding	6,200,000	'	6,200,000	'	'	3,400,000
Bank guarantees for security deposits	$3,010,000	'	$3,010,000	'	'	$0

SEGMENTS_Details

SEGMENTS (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

business_activity

Revenue

Revenue

Revenue

Revenue

Revenue

Revenue

Revenue

Revenue

Accounts receivable

Accounts receivable

Accounts receivable

Accounts receivable

North America

North America

North America

North America

North America

All Other Countries

All Other Countries

All Other Countries

All Other Countries

All Other Countries

segment

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

manager

agency

advertiser

agency

advertiser

advertiser

agency

agency

advertiser

agency

advertiser

advertiser

agency

Segment Reporting [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of business activities

'

'

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of segment managers held accountable for operations, operating results or plans for levels or components below the consolidated unit level

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of reportable segments

'

'

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of operating segments

'

'

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Segments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total revenue

$102,098

$62,458

$269,137

$155,039

'

'

'

'

'

'

'

'

'

'

'

'

'

$85,948

$56,578

$226,519

$137,824

'

$16,150

$5,880

$42,618

$17,215

'

Total long-lived assets

$78,217

'

$78,217

'

$25,794

'

'

'

'

'

'

'

'

'

'

'

'

$73,263

'

$73,263

'

$23,956

$4,954

'

$4,954

'

$1,838

Number of customers

'

'

'

'

'

2

0

2

0

0

3

2

0

3

0

0

0

'

'

'

'

'

'

'

'

'

'