Tubemogul (TUBE) 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	Nov. 30, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Trading Symbol	'TUBE	'
Entity Registrant Name	'TUBEMOGUL INC	'
Entity Central Index Key	'0001449278	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	29,792,201

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$48,199	$19,475
Accounts receivable, net of allowance for doubtful accounts	65,965	46,920
Prepaid expenses and other current assets	2,733	1,420
Total current assets	116,897	67,815
Deferred tax assets	368	468
Property, equipment and software, net	3,917	1,467
Restricted cash	742	334
Other assets	456	531
Total assets	122,380	70,615
Current liabilities:	'	'
Accounts payable	19,390	4,032
Accrued liabilities	25,838	34,414
Convertible note	401	419
Current portion of note payable, net of discount	1,470	1,416
Convertible preferred stock warrant liability	0	684
Deferred revenue	1,313	467
Deferred tax liabilities	368	468
Total current liabilities	48,780	41,900
Deferred rent	537	97
Note payable, net of current portion and discount	252	1,363
Total liabilities	49,569	43,360
Stockholders’ equity:	'	'
Common stock; $0.001 par value; 62,000,000 and 200,000,000 shares authorized as of December 31, 2013 and September 30, 2014, respectively; 6,674,757 and 29,790,224 shares issued and outstanding as of December 31, 2013 and September 30, 2014, respectively	30	7
Additional paid-in capital	92,178	46,116
Accumulated deficit	-19,241	-18,841
Accumulated other comprehensive loss	-156	-43
Total stockholders’ equity	72,811	27,255
Total liabilities and stockholders’ equity	122,380	70,615
Series A	'	'
Stockholders’ equity:	'	'
Convertible preferred stock	'	2
Series A-1	'	'
Stockholders’ equity:	'	'
Convertible preferred stock	'	4
Series B	'	'
Stockholders’ equity:	'	'
Convertible preferred stock	'	5
Series C	'	'
Stockholders’ equity:	'	'
Convertible preferred stock	'	5
Preferred stock class undefined	'	'
Stockholders’ equity:	'	'
Convertible preferred stock	'	'

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Convertible preferred stock, shares authorized	10,000,000	93,174,947
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	200,000,000	62,000,000
Common stock, shares issued	29,790,224	6,674,757
Common stock, shares outstanding	29,790,224	6,674,757
Series A	'	'
Convertible preferred stock, par value	$0.00	$0.00
Convertible preferred stock, shares authorized	0	4,177,390
Convertible preferred stock, shares issued	0	2,088,704
Convertible preferred stock, shares outstanding	0	2,088,704
Series A-1	'	'
Convertible preferred stock, par value	$0.00	$0.00
Convertible preferred stock, shares authorized	0	7,847,028
Convertible preferred stock, shares issued	0	3,846,357
Convertible preferred stock, shares outstanding	0	3,846,357
Series B	'	'
Convertible preferred stock, par value	$0.00	$0.00
Convertible preferred stock, shares authorized	0	10,298,658
Convertible preferred stock, shares issued	0	5,149,330
Convertible preferred stock, shares outstanding	0	5,149,330
Series C	'	'
Convertible preferred stock, par value	$0.00	$0.00
Convertible preferred stock, shares authorized	0	8,851,871
Convertible preferred stock, shares issued	0	4,425,939
Convertible preferred stock, shares outstanding	0	4,425,939
Preferred stock class undefined	'	'
Convertible preferred stock, par value	$0.00	$0.00
Convertible preferred stock, shares authorized	10,000,000	0
Convertible preferred stock, shares issued	0	0
Convertible preferred stock, shares outstanding	0	0

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue:	'	'	'	'
Total revenue	$27,420	$12,953	$78,161	$35,174
Cost of revenue	8,255	4,487	23,578	12,167
Gross profit	19,165	8,466	54,583	23,007
Operating expenses:	'	'	'	'
Research and development	5,287	3,204	14,035	8,354
Sales and marketing	8,783	5,231	24,997	14,648
General and administrative	5,583	3,097	14,725	6,924
Total operating expenses	19,653	11,532	53,757	29,926
(Loss) Income from operations	-488	-3,066	826	-6,919
Other (expense) income, net:	'	'	'	'
Interest expense, net	-63	-41	-183	-134
Change in fair value of convertible preferred stock warrant liability	0	-36	168	-55
Foreign exchange gain (loss)	-1,102	165	-1,010	-346
Other income (expense), net	-1,165	88	-1,025	-535
Net loss before income taxes	-1,653	-2,978	-199	-7,454
Provision for income taxes	-64	-34	-201	-68
Net loss	-1,717	-3,012	-400	-7,522
Basic and diluted net loss per share attributable to common stockholders	($0.06)	($0.46)	($0.03)	($1.14)
Basic and diluted weighted-average shares used to compute net loss per share attributable to common stockholders	29,058,656	6,618,719	14,345,685	6,605,833
Platform Direct	'	'	'	'
Revenue:	'	'	'	'
Total revenue	12,114	4,649	32,929	10,937
Platform Services	'	'	'	'
Revenue:	'	'	'	'
Total revenue	$15,306	$8,304	$45,232	$24,237

Condensed_Consolidated_Stateme1

Condensed 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 Income And Comprehensive Income [Abstract]	'	'	'	'
Net loss	($1,717)	($3,012)	($400)	($7,522)
Other comprehensive loss:	'	'	'	'
Foreign currency translation adjustments, net of tax	17	-33	-113	-42
Comprehensive loss	($1,700)	($3,045)	($513)	($7,564)

Condensed_Consolidated_Stateme2

Condensed Consolidated Statement of Changes in Stockholders' Equity (USD $)	Total	Series A Convertible Preferred Stock	Series A-1 Convertible Preferred Stock	Series B Convertible Preferred Stock	Series C Convertible Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated other comprehensive loss	Accumulated Deficit
In Thousands, except Share data
Balances at Dec. 31, 2013	$27,255	$2	$4	$5	$5	$7	$46,116	($43)	($18,841)
Balances, Shares at Dec. 31, 2013	'	2,088,704	3,846,357	5,149,330	4,425,939	6,674,757	'	'	'
Issuance of common stock upon exercise of options, Shares	324,357	'	'	'	'	324,357	'	'	'
Issuance of common stock upon exercise of options	275	'	'	'	'	'	275	'	'
Conversion of convertible preferred stock to common stock, Shares	'	-2,088,704	-3,846,357	-5,149,330	-4,425,939	15,510,330	'	'	'
Conversion of convertible preferred stock to common stock	'	-2	-4	-5	-5	16	'	'	'
Cashless exercise of stock warrants to common stock, Shares	'	'	'	'	'	93,280	'	'	'
Cashless exercise of stock warrants to common stock	516	'	'	'	'	'	516	'	'
Issuance of common stock from initial public offering, net of issuance costs, Shares	'	'	'	'	'	7,187,500	'	'	'
Issuance of common stock from initial public offering, net of issuance costs of $3,349	43,442	'	'	'	'	7	43,435	'	'
Stock-based compensation expense	1,836	'	'	'	'	'	1,836	'	'
Unrealized exchange loss	-113	'	'	'	'	'	'	-113	'
Net loss	-400	'	'	'	'	'	'	'	-400
Ending Balances at Sep. 30, 2014	$72,811	'	'	'	'	$30	$92,178	($156)	($19,241)
Ending Balances, Shares at Sep. 30, 2014	'	'	'	'	'	29,790,224	'	'	'

Condensed_Consolidated_Stateme3

Condensed Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014
Statement Of Stockholders Equity [Abstract]	'
Issuance of common stock from IPO, Issuance costs	$3,349

Condensed_Consolidated_Stateme4

Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:	'	'
Net loss	($400)	($7,522)
Adjustments to reconcile net loss to net cash used in operating activities:	'	'
Depreciation and amortization	549	198
Loss (gain) on change in value of convertible preferred stock warrant liability	-168	55
Provision for doubtful accounts	526	387
Provision for credit memos	1,173	'
Stock-based compensation expense	1,836	444
Changes in operating assets and liabilities:	'	'
Accounts receivable	-20,745	-6,282
Prepaid expenses and other current assets	-1,313	-1,949
Payments of costs related to initial public offering	-3,349	'
Other assets	75	198
Accounts payable	15,179	347
Accrued liabilities	-8,576	6,798
Deferred rent	440	-5
Deferred revenue	846	-166
Deferred tax assets	100	'
Deferred tax liabilities	-100	'
Net cash used in operating activities	-13,927	-7,497
Cash flows from investing activities:	'	'
Restricted cash	-408	-334
Purchases of property, equipment and software	-2,819	-1,063
Net cash used in investing activities	-3,227	-1,397
Cash flows from financing activities:	'	'
Proceeds from issuance of common stock in initial public offering, net of underwriting discounts and commission	46,791	'
Proceeds from issuance of Series C preferred stock, net of issuance cost	'	10,913
Repayments on notes payable	-1,057	-1,007
Proceeds from line of credit	11,800	'
Repayment of line of credit	-11,800	'
Proceeds from issuance of convertible note	'	218
Proceeds from options exercised	275	4
Net cash provided by financing activities	46,009	10,128
Effect of exchange rate changes on cash and cash equivalents	-131	-41
Net increase in cash and cash equivalents	28,724	1,193
Cash and cash equivalents, beginning of period	19,475	19,670
Cash and cash equivalents, end of period	48,199	20,863
Supplemental disclosures:	'	'
Cash paid for interest	71	134
Conversion of preferred stock warrants to common stock warrants	516	'
Cashless exercise of stock warrants to common stock	82	'
Equipment purchased and unpaid at period-end	179	'
Common Stock	'	'
Cash flows from financing activities:	'	'
Proceeds from issuance of common stock in initial public offering, net of underwriting discounts and commission	46,800	'
Supplemental disclosures:	'	'
Conversion of convertible preferred stock to common stock	$16	'

The_Company_and_its_Significan

The Company and its Significant Accounting Policies

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

'

The Company and its Significant Accounting Policies

'

1. The Company and its Significant Accounting Policies

The Company

TubeMogul, Inc. (the Company), a Delaware corporation, is an enterprise software company for digital branding. The Company’s customers include many of the world’s largest brands and their media agencies.

The Company’s headquarters are in Emeryville, California and it has offices in Chicago, Detroit, Kiev, London, Los Angeles, New York, Shanghai, Singapore, Sydney, Tokyo, and Toronto.

On July 23, 2014, the Company consummated its initial public offering of 7,187,500 shares of common stock at an offering price of $7 per share. The shares sold in the offering included 937,500 shares sold by the Company pursuant to the underwriters’ full exercise of their over-allotment option. The net proceeds to the Company from the offering were $46.8 million after deducting underwriting discounts and commissions, and before deducting total expenses in connection with this offering of $3.3 million.

Use of Estimates

The preparation of the financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates in these condensed consolidated financial statements include allowances for doubtful accounts and credit memos, useful lives for depreciation and amortization, loss contingencies, valuation of deferred tax assets, provisions for uncertain tax positions, capitalization of software costs and assumptions used for valuation of stock-based compensation and convertible preferred stock warrant liability. Actual results could differ from those and other estimates.

Principles of Consolidation and Basis of Presentation

These 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, and include the accounts of the Company’s wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. 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 consolidated financial statements and related notes included in the Company’s prospectus dated July 17, 2014, filed with the SEC on July 18, 2014 pursuant to Rule 424(b)(4) under the Securities Act of 1933. All of the share amounts, share prices, exercise prices and other per share information throughout these condensed consolidated financial statements have been adjusted to reflect a 2-for-1 reverse stock split that was effected on April 14, 2014.

The consolidated balance sheet as of December 31, 2013 included herein was derived from the audited financial statements as of that date. These unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, the Company’s comprehensive (loss) income and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year ending December 31, 2014 or any other period.

Revenue Recognition and Deferred Revenue

The Company recognizes revenue related to the utilization of its advertising platform. Revenue is recognized when persuasive evidence of an arrangement exists, service has been provided to the customer, collection of the fees is reasonably assured, and fees are fixed or determinable. Arrangements with customers do not provide the customer with the right to take possession of the software or platform at any time. The Company generates revenue from its platform through its Platform Direct and Platform Services offerings. Revenue for both Platform Direct and Platform Services is recognized when the advertisement is displayed. The Company’s arrangements are cancellable by the customer as to any unfulfilled portion of a campaign without penalty. Media is purchased on the Company’s platform on a real-time basis and purchasing ceases upon cancellation. In the Company’s Platform Services arrangements once the advertising is delivered in accordance with the terms of the insertion order, the related amounts earned for such advertising delivery are non-refundable.

The Company’s Platform Direct arrangements are evidenced by signed contracts. The Platform Services arrangements are evidenced through direct insertion orders. Revenue is recognized during the period in which the advertising is delivered. The Company also maintains processes to determine the collectability of amounts due from customers. To the extent any of the revenue recognition criteria are not met, the Company defers revenue.

Amounts that have been invoiced for services are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria outlined above have been met. In instances where customers prepay, the Company will defer recognition of revenue until the criteria outlined above are met and actual ads have been delivered during the period based on the terms specified in the agreement with the customer.

In accordance with ASC Topic 605, Revenue Recognition, paragraph 45-1, the Company recognizes revenue on a gross or net basis for each model based on its determination as to whether the Company is acting as the principal in the revenue generation process or as an agent.

Indicators that an entity is acting as a principal include: (a) the entity has the primary responsibility (primary obligor) for providing the goods or services to the customer or for fulfilling the order; (b) the entity has inventory risk before or after the customer order; (c) the entity has latitude in establishing prices, either directly or indirectly; and (d) the entity bears the customer’s credit risk for the amount receivable from the customer.

Indicators that an entity is acting as an agent exist when it does not have exposure to the significant risks and rewards associated with the sale of goods or the rendering of services. One key feature indicating that an entity is acting as an agent is that the amount the entity earns is predetermined, being either a fixed fee per transaction or a stated percentage of the amount billed to the customer.

Platform Direct — Platform Direct provides customers with self-serve capabilities for real-time media buying, serving, targeting, optimization and brand measurement. The Company enters into contracts with customers under which fees earned by the Company are based on a utilization fee that is a percentage of media spend through the platform as well as fees for additional features offered through the Company’s platform. These features are delivered concurrently with the related advertising. Due to the fact that the features are delivered concurrently, the Company does not allocate revenue between the two elements.

The Company recognizes revenue for Platform Direct on a net basis primarily based on the Company’s determination that it is not deemed to be the primary obligor, does not have inventory risk as the customer chooses the inventory to purchase on a real-time basis, the actual cost of the campaign is determined by the customer through the real-time bidding process, through management of the campaign the customer can define supplier preferences or specific suppliers from a list the Company maintains, and the amount earned by the Company is fixed based on a percentage of the media spend of a customer’s campaign.

Platform Services — Platform Services provide customers the opportunity to utilize the Company’s platform on a managed service basis, whereby the Company delivers digital video advertisements based upon a pre-agreed set of fixed objectives with an advertiser or agency. The Company enters into customer agreements through discrete binding insertion orders with fixed price commitments which are determined prior to the launch of an advertising campaign.

For Platform Services, the Company recognizes revenue on a gross basis primarily based on the Company’s determination that it is subject to the risk of fluctuating costs from its media vendors, has latitude in establishing prices with its customer, has discretion in selecting media vendors when fulfilling a customer’s campaign, and has credit risks.

Cost of Revenue

Cost of revenue is comprised primarily of media costs. Media costs consist of advertising impressions the Company purchases from sources of advertising inventory in connection with its Platform Services offering. The Company typically pays for these impressions on a cost per thousand impression (CPM) basis. Cost of revenue also includes technical infrastructure costs which include the cost of internal and third-party servers and related services, internet access costs and amortization of internal use software development costs on revenue-producing technologies.

Capitalized Internal-Use Software Development Costs

For web site development costs and development costs related to the Company’s platform, the Company capitalizes qualifying computer software costs which are incurred during the application development stage. Costs related to preliminary project activities and post implementation activities are expensed as incurred to research and development. 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 used as intended. Costs incurred for enhancements that are expected to result in additional material functionality are capitalized. The Company capitalized $94 and $517 in internal-use software development costs related to platform enhancement and website development cost during the three months ended September 30, 2013 and 2014, respectively, and $527 and $818 during the nine months ended September 30, 2013 and 2014, respectively. These costs are included in property, equipment and software, net on the 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, which is generally three years. Costs for research and development efforts have been expensed as incurred and relate primarily to payroll costs incurred in the development of the platform.

Cash and Cash Equivalents

The Company considers all highly liquid investments having original maturities of three months or less at the date of purchase to be cash equivalents. The Company’s cash equivalents consist of short-term money market instruments. Amounts held on deposit at financial institutions may exceed Federal Deposit Insurance Corporation (FDIC) insured limits. To date, the Company has not experienced any losses on such deposits.

Restricted Cash

Restricted cash at December 31, 2013 and September 30, 2014 represents cash restricted for the Company’s irrevocable standby letters of credit in the amount of $334 and $742, respectively for the benefit of certain of the Company’s real property lessors.

Accounts Receivable

Accounts receivable are stated at net realizable value. The Company provides an allowance for doubtful accounts based on management’s evaluation of outstanding accounts receivable. The Company maintains reserves for potential credit losses on customer accounts when deemed necessary. The Company analyzes specific accounts receivable, historical bad debts, customer concentrations, current economic trends, and changes in the customer payment terms when evaluating the adequacy of the allowance for bad debts. Accounts receivable are written off when no future collection is possible.

Many of the Company’s contracts with advertising agencies provide that if the brand (i.e., the agency’s customer) does not pay the agency, the agency is not liable to the Company and the Company must seek payment from the brand. Accordingly, the Company considers the creditworthiness of the brand in establishing its allowance for doubtful accounts. However, since inception, the Company has not had to initiate collection efforts directly with any brands where the contract was with an advertising agency.

The following table presents the changes in the allowance for doubtful accounts:

Year Ended

Nine months Ended

December 31,

September 30,

2013

2014

Balance, beginning of period

$

(350

)

$

(714

)

Additions to allowance

(539

)

(1,699

)

Write offs, net of recoveries

175

1,060

Balance, end of period

$

(714

)

$

(1,353

)

Property, Equipment and Software, net

Property, equipment and software, net are carried at cost and are depreciated on the straight-line basis over their estimated useful lives of three to seven years. Repairs and maintenance are charged to expense as incurred, and improvements are capitalized. When the assets are sold or retired or otherwise disposed of, their cost and related accumulated depreciation and amortization are removed from the accounts with the resulting gain or loss reflected as an operating item in the accompanying consolidated statements of operations.

Leasehold improvements are amortized on a straight-line basis over the remaining term of the lease, or the useful life of the assets, whichever is shorter.

Construction in process mainly consists of leasehold improvements and furniture at the Company’s offices under construction, as well as server equipment that has not been placed in service as of September 30, 2014. Upon completion of construction and commencement of the use of the server, the assets will be depreciated over the shorter of their useful lives or the remaining lease term.

Fair Value Measurement and Financial Instruments

The Company measures the fair value of its financial instruments in accordance with of the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) for Fair Value Measurements. Under this standard, fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the exit price) in an orderly transaction between market participants at the measurement date. In determining fair values of all reported assets and liabilities that represent financial instruments, the Company uses the carrying market values of such amounts. The provision establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company.

Unobservable inputs are inputs that reflect the Company’s assumptions as to what market participants would use in pricing the asset or liability developed based on the best information available under the circumstances. The hierarchy is broken down into three levels based on the observability of inputs as follows:

Level 1 — Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date.

Level 2 — Other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability.

Level 3 — Unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at measurement date.

The following table sets forth by level, within the fair value hierarchy, the Company’s assets and liabilities at December 31, 2013 and September 30, 2014, measured at fair value on a recurring basis:

Financial Instruments at Fair  Value as of December 31, 2013

Level 1

Level 2

Level 3

Total

Assets:

Cash equivalents-money market

$

19,475

$

—

$

—

$

19,475

Liability:

Warrant Liability

$

—

$

—

$

684

$

684

Financial Instruments at Fair  Value as of September 30, 2014

Level 1

Level 2

Level 3

Total

Assets:

Cash equivalents-money market

$

48,199

$

—

$

—

$

48,199

Liability:

Warrant Liability

$

—

$

—

$

—

$

—

In fiscal year 2010, the Company issued a Series A-1 preferred stock warrant that contained a price protection clause that provides that the exercise price of the warrants is to be adjusted downwards upon the Company issuing Additional Stock (as defined in the warrant agreement) at more favorable pricing. As a result of this price protection clause, the Company determined that the warrant is not considered indexed to the Company’s own stock and as a result recorded the warrant as a liability measured at fair value at the time of issuance. The Company records “mark-to-market” adjustments each reporting period under other income expense, net. As the warrant’s fair value is based on significant inputs that are not observable in the market, they are categorized as Level 3. Changes in warrant liability (see Note 4) consisted of the following during:

Year Ended

Nine months Ended

December 31,

September 30,

2013

2014

Balance, beginning of period

$

296

$

684

Change in fair value of convertible preferred stock warrant liability

388

(168

)

Conversion of warrants to common stock

—

(516

)

Balance, end of period

$

684

$

—

Since all carrying amounts of these investments approximate fair value, no other comprehensive income or loss has been recognized. There were no sales, purchases, settlements, or transfers in or out of Level 3 liabilities.

Other financial instruments not measured at fair value on the accompanying consolidated balance sheets at December 31, 2013 and September 30, 2014, but which require disclosure of their fair values include accounts receivable, accounts payable, accrued expenses and debt. The estimated fair values of such instruments at December 31, 2013 and September 30, 2014 approximated their carrying values. The fair values of all of these instruments are categorized as Level 2 in the fair value hierarchy.

Quantitative Information about Level 3 Fair Value Measurements

The significant unobservable inputs used in the fair value measurement of the Company’s convertible preferred stock warrant:

Fair Value

Fair Value

Significant

at December 31,

September 30,

Valuation

unobservable

2013

2014

technique

input

Convertible preferred warrant liability

$

684

$

—

Monte Carlo Simulation

Value of underlying

Series A-1 preferred stock, volatility, and expected term.

Sensitivity to Changes in Significant Unobservable Inputs

The significant unobservable inputs used in the fair measurement of the warrant are the volatility of the underlying stock value, expected term, and the value of the Company’s Series A-1 preferred stock. Significant increases (decreases) in these unobservable inputs in isolation could result in a significantly different fair value measurement.

Income Taxes

The Company accounts for income taxes in accordance with FASB ASC Topic 740, Income Taxes, under which deferred tax liabilities and assets are recognized for the expected future tax consequences of temporary differences between the financial reporting and tax basis of assets and liabilities, as well as for operating loss (NOL) and tax credit carryforwards. Deferred tax assets and liabilities are measured using the tax rates that are expected to apply to taxable income for the years in which those tax assets and liabilities are expected to be realized or settled. The Company records a valuation allowance to reduce their deferred tax assets to the net amount that is more likely than not to be realized.

The Company utilizes a two-step approach to evaluate tax positions. Recognition, step one, requires evaluation of the tax position to determine if based solely on technical merits it is more likely than not (MLTN) to be sustained upon examination. The MLTN standard is met when the likelihood of occurrence is greater than 50%. Measurement, step two, is addressed only if step one is satisfied. In step two, the tax benefit is measured as the largest amount of benefit, determined on a cumulative probability basis, which is MLTN to be realized upon ultimate settlement with tax authorities. If a position does not meet the MLTN threshold for recognition in step one, no benefit is recorded until the first subsequent period in with the MLTN standard is met, the issue is resolved with the tax authority, or the statute of limitations expires. Positions previously recognized are derecognized when the Company subsequently determines that the position is no longer MLTN to be sustained.

The Company recognizes interest and penalties related to income taxes in its provision for income tax.

Accounting for Impairment of Long-Lived Assets

The Company evaluates the recoverability of property, equipment and software and other assets, including identifiable intangible assets with definite lives, whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets held and used is measured by comparison of the carrying amount of an asset or an asset group to estimated undiscounted future net cash flows expected to be generated by the asset or asset group. If the carrying amount of an asset exceeds these estimated future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the assets exceeds the fair value of the asset or asset group, based on discounted cash flows. Assets to be disposed of are reported at the lower of their carrying amount or fair value less cost to sell. There were no impairment charges recorded in any of the periods presented.

Advertising Costs

The Company’s policy is to expense all advertising costs as incurred. Advertising expense includes costs for user conferences, tradeshows, print marketing and design consulting. Advertising expense was $946 and $1.6 million for the three months ended September 30, 2013 and 2014, respectively, and was $2.3 million and $3.2 million for the nine months ended September 30, 2013 and 2014, respectively, and is included in sales and marketing expense in the accompanying condensed consolidated statements of operations.

Stock-Based Compensation

The Company’s stock-based compensation expense is estimated at the grant date based on the fair value of the award and is recognized as expense ratably over the requisite service period of the award. Determining the appropriate fair value and calculating the fair value of share-based awards requires judgment, including estimating share price volatility, forfeiture rates, expected dividends, and expected life. The Company calculates the fair value of each restricted stock unit award to employees on the date of grant and to non-employees on each measurement date based on the fair value of its common stock. The Company calculates the fair value of each option award on the date of grant under the Black-Scholes option pricing model using certain assumptions. For nonemployee consultants, the Company revalues the unvested options at each measurement period.

The Black-Scholes model requires the use of highly subjective and complex assumptions, which determine the fair value of share-based awards, including the option’s expected term and the price volatility of the underlying stock. The Company’s current estimate of volatility is based on the volatility of comparable public companies. To the extent volatility of the Company’s stock price increases in the future, the Company’s estimates of the fair value of options granted in the future could increase, thereby increasing stock-based compensation in future periods. The computation of expected lives was based on expectations of future employee behavior. The interest rate for periods within the contractual life of the award is based on the U.S. Treasury yield curve in effect at the time of grant. In addition, the Company applies an expected forfeiture rate when amortizing stock-based compensation. To the extent the Company revises this estimate in the future; its stock-based compensation could be materially impacted in the year of revision.

Segments

The Company’s chief operating decision maker (CODM), its Chief Executive Officer, reviews financial information for the Company on a consolidated basis. The Company manages its business on the basis of one operating segment. The Company’s principal decision-making functions are located in the United States.

Earnings Per Share

The Company applies the two-class method for calculation and presenting earnings per share. Under the two-class method, net income is allocated between common units and other participating securities based on their participating rights. Participating securities are defined as securities that participate in dividends with common units according to a pre-determined formula or a contractual obligation to share in the income of the entity. Upon the conversion of the preferred stock and preferred stock warrants at the time of the IPO, there are no other participating securities outstanding. Basic net (loss) income per common unit is calculated by dividing the net income by the weighted-average number of common units outstanding for the period. Diluted net income per share is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period. Due to the net losses for the three and nine months ended September 30, 2013 and 2014, there is no impact or change in presentation as a result of applying the two-class method.

Concentration of Risk

As of December 31, 2013, one customer accounted for 14% of outstanding gross accounts receivable. This customer is an advertising agency. There were no customers that accounted for more than 10% of revenue during the year ended December 31, 2013. Branches or divisions of an advertiser that operate under distinct contracts are generally considered as separate customers. In particular, the Company treats as separate customers different groups within global advertising agencies if they are based in different jurisdictions or with respect to which the Company negotiated and manages separate contractual relationships.

Three media vendors individually accounted for 26%, 18% and 12% of total media cost for the year ended December 31, 2013.

Foreign Currency Translation and Transactions

The consolidated financial statements of the Company’s foreign subsidiaries are measured using the local currency as the functional currency. Assets and liabilities of foreign subsidiaries are translated at exchange rates in effect as of the balance sheet date. Revenues and expenses are translated at average exchanges rates in effect during the period. Translation adjustments are recorded within accumulated other comprehensive loss, a separate component of stockholders’ equity, on the accompanying consolidated balance sheets. Foreign exchange gain (loss) is impacted by movements in exchange rates and the amount of foreign-currency denominated receivables and payables. The foreign exchange loss in the three months and nine months ended September 30, 2014 was primarily attributable to the strengthening of the U.S. Dollar in relation to the Australian Dollar, Canadian Dollar, British Pound and Euro for foreign-currency denominated transactions.

Deferred Offering Costs

Deferred offering costs consisted primarily of direct incremental costs related to the Company’s initial public offering (IPO) of its common stock. The Company recorded $129 of deferred offering costs in other assets on the Company’s condensed consolidated balance sheets as of December 31, 2013. No deferred offering costs are included as of September 30, 2014. Upon completion of the IPO, the deferred offering costs of $3.3 million were offset against the proceeds of the offering.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board issued guidance related to revenue from contracts with customers. Under this guidance, revenue is recognized when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. The updated standard will replace most existing revenue recognition guidance under U.S. generally accepted accounting principles (GAAP) when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. Early adoption is not permitted. The updated standard will be effective for us in the first quarter of 2017. The Company has not yet selected a transition method and is currently evaluating the effect that the updated standard it will have on its consolidated financial statements and related disclosures.

Property_Equipment_and_Softwar

Property, Equipment and Software	9 Months Ended
	Sep. 30, 2014
Property Plant And Equipment [Abstract]	'
Property, Equipment and Software	'
	2. Property, Equipment and Software
	Property, equipment and software as of December 31, 2013 and September 30, 2014 consisted of the following:
		December 31,			September 30,
		2013			2014
	Computer and office equipment	$	607		$	1,055
	Capitalized internal use software costs		636			914
	Furniture and fixtures		369			976
	Software		73			168
	Leasehold improvements		202			752
	Construction in process	—				1,016
			1,887			4,881
	Less accumulated depreciation and amortization		(420	)		(964	)
	Total	$	1,467		$	3,917
	Total depreciation and amortization expense, excluding amortization of capitalized internal use software costs, was $71 and $172 for three months ended September 30, 2013 and 2014, respectively and $151 and $372 for the nine months ended September 30, 2013 and 2014, respectively. The amortization expense of capitalized internal use software costs was $33 and $68 for three months ended September 30, 2013 and 2014, respectively and $47 and $177 and for the nine months ended September 30, 2013 and 2014, respectively and is recorded in cost of revenue.

Accrued_Liabilities

Accrued Liabilities	9 Months Ended
	Sep. 30, 2014
Accounts Payable And Accrued Liabilities Current [Abstract]	'
Accrued Liabilities	'
	3. Accrued Liabilities
	Accrued liabilities at December 31, 2013 and September 30, 2014, consisted of the following:
		December 31,		September 30,
		2013		2014,
	Accrued media costs	$	28,603	$	19,525
	Sales commissions		1,296		1,833
	Payroll and related expenses		1,750		2,586
	Other accrued expenses		1,321		1,011
	Customer rebates		1,444		883
		$	34,414	$	25,838
	Accrued media costs consist of amounts owed to the Company’s vendors for impressions delivered through December 31, 2013 and September 30, 2014.

Debt_Obligations

Debt Obligations	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Debt Obligations	'
	4. Debt Obligations
	Note Payable
	Growth Capital Term-Debt and Working Capital Line of Credit
	On August 21, 2013, the Company entered into an amended and restated loan and security agreement providing for a growth capital facility and a revolving line of credit. Under the growth capital facility, the Company has the ability to borrow a maximum of $4.25 million in growth capital term loan advances, which bear an interest rate of 4.75% and are secured by the Company’s assets.  Under the revolving line of credit, the Company may be advanced up to $20 million based on 80% of eligible accounts receivable less the outstanding growth capital term loan balance at the advance date as defined in the amended agreement. Monthly payments of principal and interest are payable in equal installments. As of September 30, 2014, the balance of the growth capital loan was $1.73 million, less the remaining warrant discount of $5 for a net balance of $1.72 million.
	On April 18, 2014, the Company entered into an amendment to its amended and restated loan and security agreement dated August 21, 2013. The amendment increased the revolving line of credit to $35 million, extended the availability and maturity of the revolving line through April 1, 2016, and added a new $3 million equipment term loan facility. The amendment also introduced a new financial covenant that requires the Company meet certain minimum revenue levels. As of September 30, 2014, the Company had available borrowings under the revolving line of credit of $33.6 million.
	Under the amended and restated loan and security agreement, as amended, the Company may borrow under the revolving line of credit up to the lesser of (a) $35 million, and (b) a borrowing base equal to 80% of eligible accounts receivable as defined in the agreement, as amended. If the Company’s trailing nine-month EBITDA as defined in the amendment is less than $1,000,000, then the outstanding amount of advances under the equipment loan facility are deducted from availability. Advances under the line of credit accrue interest at a floating per annum rate equal to the Western Edition Wall Street Journal prime rate. While the interest rate applicable to outstanding advances under the revolving line did not change under the amendment, the Company is now required to pay a minimum amount of interest equal to the amount of interest that would accrue per quarter on a notional outstanding principal balance of $2 million, or $1 million if the Company maintains more than $50 million in deposits with the lender.
	If the combined amount of the Company’s cash on deposit with the lender, plus the availability under the revolving line of credit is less than $10 million, then the Company is required to deliver additional reporting, collections on accounts receivable are applied to immediately reduce the outstanding amount of advances under the revolving line, and the lender is allowed to take, in good faith, additional reserves against availability under the revolving line.
	Under the amended and restated loan and security agreement, as amended, the lender has also made available a $3 million equipment loan facility that can be used to finance the costs related to new equipment purchases that are approved by the lender. The Company may request advances under the equipment term loan facility through December 31, 2014, and outstanding amounts under that facility bear interest at a floating annual rate of interest equal to the prime rate plus half of one percent (0.5%). The Company is required to repay each equipment term loan in 36 equal monthly payments of principal plus accrued interest commencing on the first day of the month immediately following the funding of each equipment term loan. There were no outstanding borrowings under the equipment loan facility as of September 30, 2014.
	Future Payments
	Future principal payments of long-term debt as of September 30, 2014 were as follows:
	2014 (remaining 3 months)	$	363
	2015		1,364
	Total	$	1,727
	Discount		(5	)
	Less current portion		(1,470	)
	Noncurrent portion of debt	$	252
	Warrants
	In connection with a note payable issued in March 2010, the Company issued a warrant to purchase 77,161 shares of Series A-1 preferred stock at a price of $0.8748 per share. The warrant will expire in 2020. The warrant contains a down round protection clause. The Company accounted for the warrant at fair value and recorded it as a liability in accordance with FASB ASC Subtopic 815-40, Derivatives and Hedging Contracts in Entity’s Own Equity. Changes in the fair value of the warrant from the date of issuance up to the balance sheet date are included in the accompanying consolidated statements of operations and comprehensive loss during the year. The fair value of the warrant liability is based on a Monte Carlo Simulation that utilizes various assumptions, including expected term, volatility, risk-free interest rate, share issuance frequency, and exercise price.
	On July 23, 2014, upon the closing of the Company’s IPO, the warrant converted from a warrant to purchase Series A-1 preferred stock to a warrant to purchase shares of common stock, and the liability at its then fair value of $516 was reclassified to additional paid-in capital. Prior to this date, all changes in the fair value of the warrant were recorded in other (expense) income in the accompanying unaudited condensed consolidated statements of operations. On August 15, 2014, the warrant was net exercised in full for 69,895 shares of common stock.
	The following assumptions were used at December 31, 2013 and July 23, 2014 (date of warrant conversion):
		December 31,			July 23,
		2013			2014
	Risk-free interest rate		3.04	%		2.53	%
	Expected volatility		80	%		80	%
	Expected lives	6.3 years			5.8 years
	Fair value of underlying equity	$	9.4		$	7
	The Company recorded the fair value of the warrant at issuance of $56 as a discount to the note payable to be amortized over the three year life of the loan.
	The warrant liability recorded by the Company was $684 and $0 at December 31, 2013 and September 30, 2014, respectively. A revaluation loss (gain) of  $36 and $0 was recorded during the three months ended September 30, 2013 and 2014, respectively and $55 and $(168) during the nine months ended September 30, 2013 and 2014, respectively, relating to the change in fair value in each period.
	TubeMogul Japan Inc. Financing
	In December 2012, the Company’s subsidiary TubeMogul Japan Inc. raised $232 from an investor through the issuance of a convertible note to finance its operations in Japan. In February 2013, the Company’s subsidiary raised an additional $187 in financing from three new investors, of which one is a member of the Company’s Board of Directors, through the issuance of convertible notes, to secure additional financing for our wholly-owned subsidiary in Japan. The notes are non-interest bearing and non-collateralized.

Stockholders_Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2014
Stockholders Equity Note [Abstract]	'
Stockholders' Equity	'
	5. Stockholders’ Equity
	Initial Public Offering
	On July 23, 2014, the Company consummated its initial public offering of 7,187,500 shares of common stock at an offering price of $7 per share. The shares sold in the offering included 937,500 shares sold by the Company pursuant to the underwriters’ full exercise of their over-allotment option. The net proceeds to the Company from the offering were approximately $46.8 million after deducting underwriting discounts and commissions, and before deducting total estimated expenses in connection with this offering of $3.3 million.  Upon the closing of the IPO, all shares of the Company’s previously outstanding preferred stock automatically converted into shares of common stock and outstanding warrants to purchase the Company’s preferred stock automatically became exercisable for shares of common stock. As a result, as of July 23, 2014, the Company had 29,683,122 shares of common stock issued and outstanding, and no shares of preferred stock outstanding.
	Common and Preferred Stock
	In association with its IPO, the Company’s board of directors and stockholders approved the amendment and restatement of the Company’s certificate of incorporation, which was effective immediately following the closing of the IPO on July 23, 2014.  Under the Company’s amended and restated certificate of incorporation, the Company is authorized to issue up to 200,000,000 shares of common stock and 10,000,000 shares of undesignated preferred stock.
	The following table presents the shares authorized and issued and outstanding as of the periods presented:
					Shares			Issuance
		Shares			Issued and			Price Per		Carrying		Liquidation
		Authorized			Outstanding			Share		Value(1)		Preference
	Series A		4,177,390			1,257,838		$	1.21	$	1,448	$	1,525
	Series A	—				830,866			0.9093		756		1,007
	Series A-1		7,847,028			3,675,129			0.8748		3,128		3,215
	Series A-1	—				171,228			0.6998		120		150
	Series B		10,298,658			5,149,330			1.942		9,896		10,000
	Series C		8,851,871			4,425,939			6.4748		28,564		28,658
	Common stock, $0.001 par value		62,000,000			6,674,757
	Balance as of December 31, 2013		93,174,947			22,185,087				$	43,912	$	44,555
	Converted		(31,174,947	)		(15,510,330	)
	Preferred stock as of September 30, 2014		10,000,000		—
	Common stock, $0.001 par value as of September 30, 2014		200,000,000			29,790,224
	-1	Amounts are net of issuance costs.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	6. Commitments and Contingencies
	Lease Commitments
	At various dates throughout 2013 and during the nine months ended September 30, 2014, the Company entered into leases and subleases for office space. The leases expire at various dates through 2021.
	The Company’s commitments for minimum rentals under these leases as of September 30, 2014 are as follows:
		Operating
		leases
	2014 (remaining 3 months)		1,370
	2015		1,735
	2016		1,544
	2017		1,085
	2018		889
	Thereafter		1,694
	Total minimum lease payments	$	8,317
	Rent expense was $275 and $644 for the three months ended September 30, 2013 and 2014, respectively and $756 and $1.7 million for the nine months ended September 30, 2013 and 2014, respectively.
	Irrevocable Standby Letter of Credit
	On July 2, 2013, the Company entered into an irrevocable standby letter of credit in the amount of $334 for the benefit of its sub landlord. The irrevocable standby letter of credit is for a one-year term and expires on July 2, 2014 and may be canceled prior to the expiration date upon the written request of the beneficiary. The letter of credit was automatically renewed on July 2, 2014 and the expiration date was extended to July 2, 2015.
	In February 2014, the Company entered into an irrevocable standby letter of credit in the amount of $408 for the benefit of one of its lessors. The irrevocable standby letter of credit is for a one year term and expires in February 2015 and may be canceled prior to the expiration date upon the written request of the beneficiary.
	The Company is contractually required to keep the letters of credit for the term of the lease, therefore, the letters of credit are recorded as restricted cash and are classified as long-term assets on the condensed consolidated Balance Sheets.
	Legal
	The Company is involved from time to time in various claims and legal actions arising in the ordinary course of business. While it is not feasible to predict or determine the ultimate outcome of these matters, the Company believes that none of its current legal proceedings will have a material adverse effect on its financial position or results of operations.

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2014
Share Based Compensation [Abstract]	'
Stock-Based Compensation	'
	7. Stock-Based Compensation
	On July 9, 2007, the board of directors and stockholders of the Company approved and adopted the TubeMogul, Inc. 2007 Equity Compensation Plan (the “2007 Plan”) that permitted the grant of incentive and nonqualified stock options, stock awards (including restricted stock units), and stock appreciation rights to purchase shares of the common stock of the Company. Under the 2007 Plan, shares of common stock are reserved for the issuance of permitted awards to eligible participants. Options granted generally vest and become exercisable over a four-year term from the date of grant, at a rate of 25% after one year, then monthly on a straight-line basis thereafter. Options granted generally are exercisable for up to 10 years from the date of grant. Restricted stock units (RSUs) granted are generally released from restriction over a four year term from the date of grant, at a rate of 25% after one year, then quarterly on a straight-line basis thereafter. Common shares purchased or issued under the 2007 Plan are subject to certain restrictions, including the right of first refusal by the Company for sale or transfer of shares to outside parties. The Company’s right of first refusal terminated upon completion of the Company’s IPO.
	The Company has authorized and reserved a total of 6,093,703 shares of common stock under the 2007 Plan for the grant of permitted awards to employees, directors, consultants, and other service providers for the Company or related companies. The 2007 Plan terminated effective July 18, 2014, though it continues to govern outstanding awards issued under the 2007 Plan prior to July 18, 2014.
	In February 2014, the Company’s board of directors and stockholders approved and adopted the TubeMogul, Inc. 2014 Equity Incentive Plan (the “2014 Plan”), and the 2014 Plan became effective on July 16, 2014, the day immediately preceding the Company’s IPO.  The 2014 Plan permits the grant of stock options, stock appreciation rights, restricted stock, RSUs, performance awards and other cash-based or stock-based awards. In addition, the 2014 Plan contains a mechanism through which the Company may adopt a deferred compensation arrangement in the future. Under the 2014 Plan, shares of common stock are reserved for the issuance of permitted awards to eligible participants. Options granted will generally vest and become exercisable over a four-year term from the date of grant, at a rate of 25% after one year, then monthly on a straight-line basis thereafter. Options granted generally are exercisable for up to 10 years from the date of grant. RSUs granted will generally be released from restriction over a four year term from the date of grant, at a rate of 25% after one year, then quarterly on a straight-line basis thereafter.
	The Company has initially authorized and reserved a total of 2,500,000 shares of common stock under the 2014 Plan for the grant of permitted awards. This reserve will automatically increase on January 1, 2015 and each subsequent anniversary through 2024, by an amount equal to the smaller of (a) five percent (5%) of the number of shares of common stock issued and outstanding on the immediately preceding December 31; and (b) an amount determined by the Company’s board of directors. This reserve also will be increased by up to an additional 4,975,000 shares, to include (a) any shares remaining available for grant under the 2007 Plan at the time of its termination; and (b) shares that would otherwise be returned to the 2007 Plan, upon the expiration or termination of awards granted under that plan.
	Shares subject to awards which expire or are cancelled or forfeited will again become available for issuance under the 2014 Plan.
	The shares available under the 2014 Plan will not be reduced by awards settled in cash.  The shares available under the 2014 Plan will be reduced by shares withheld to satisfy tax withholding obligations with respect to stock options and stock appreciation rights. The gross number of shares issued upon the exercise of stock appreciation rights or options exercised by means of a net exercise or by tender of previously owned shares will be deducted from the shares available under the 2014 Plan.
	For purposes of the tables below, the 2007 Plan and the 2014 Plan are collectively referred to as the “Plan”.  The following table summarizes the Plan’s stock option activity:
					Weighted-				Weighted
					average				average
		Outstanding			exercise				remaining		Aggregate
		number of			price per				contractual		intrinsic
		shares			share				life		value
	Balance at December 31, 2013		4,290,057		$	1.28				8	$	24,973
	Options granted		140,500			7.38
	Options exercised		(324,357	)		0.85
	Options canceled		(141,468	)		2.44
	Balance at September 30, 2014		3,964,732		$	1.49				7.37	$	41,596
	Options exercisable and vested at September 30, 2014		2,229,532		$	0.81				6.46	$	24,897
	Options vested and expected to vest at September 30, 2014		3,750,090		$	1.42				7.29	$	39,605
	The weighted average fair value of options granted was $1.70 for the three months ended September 30, 2013, no options were granted during the three months ended September 30, 2014 and $1.69 and $4.51 for the nine months ended September 30, 2013 and 2014, respectively. The aggregate intrinsic value of options exercised was $2 and $421 for the three months ended September 30, 2013 and 2014, respectively, and $33 and $2.5 million for the nine months ended September 30, 2013 and 2014, respectively.
	The fair value of options granted to employees is estimated on the date of grant and to non-employees at each measurement period using the Black-Scholes-Merton option valuation model. This share-based compensation expense valuation model requires the Company to make assumptions and judgments regarding the variables used in the calculation. These variances include the expected term (weighted average period of time that the options granted are expected to be outstanding), the expected volatility of the Company’s common stock, expected risk-free interest rate, expected dividends. To the extent actual results differ from the estimates, the difference will be recorded as a cumulative adjustment in the period estimates are revised. The Company uses the simplified calculation of expected term, as the Company does not have sufficient historical data to use any other method to estimate expected term. Expected volatility is based on an average of the historical volatilities of the common stock of several entities with characteristics similar to those of the Company. The expected risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant for periods corresponding with the expected life of the option. Expected forfeitures are based on the Company’s historical experience.
	The following assumptions were used to calculate the fair value of options for employees:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2013				2013		2014
	Risk-free interest rate		1.60%			1.2% to 1.6%		1.8% to 2.0%
	Dividend yield	—  %				—  %		—  %
	Volatility		68%			68% to 69%		66% to 67%
	Expected term	6.1 years				5.2 to 6.1 years		6.0 to 6.4 years
	The following assumptions were used to calculate the fair value of options for non-employees:
		Three Months Ended September 30,			Nine Months Ended September 30,
		2013		2014	2013		2014
	Risk-free interest rate	0.8% to 2.5%		2.0% to 2.4%	0.8% to 2.5%		2.0% to 2.4%
	Dividend yield	—  %		—  %	—  %		—  %
	Volatility	64% to 72%		63% to 65%	64% to 72%		63% to 65%
	Expected term	5 to 9.3 years		6.0 to 8.7 years	5 to 9.3 years		6.0 to 8.7 years
	The following table summarizes the Plan’s RSUs activity:
					Weighted-				Weighted
		Outstanding			Average				average
		number of			Grant Date				remaining
		shares			Fair Value				contractual life
	Balance at December 31, 2013		—		$	—				—
	RSUs granted		796,540			11				1.8
	RSUs canceled		(48,779	)		10				—
	Balance at September 30, 2014		747,761		$	11				1.8
	The fair value of RSUs granted to employees is estimated on the date of grant and to non-employees at each measurement period using the fair value of the underlying common stock.
	At September 30, 2014, there was approximately $11.5 million of total unrecognized compensation cost related to unvested stock-based compensation arrangements granted under the compensation plan. The remaining unrecognized compensation cost is expected to be recognized over the weighted average remaining vesting period of approximately 3.3 years at September 30, 2014.
	The following table summarizes the effects of share-based compensation in the Company’s accompanying consolidated statements of operations:
		Three Months							Nine Months
		Ended September 30,							Ended September 30,
		2013			2014				2013		2014
	Research and development	$	46		$	283			$	96	$	594
	Sales and marketing		88			244				151		577
	General and administrative		79			261				197		665
	Total stock-based compensation	$	213		$	788			$	444	$	1,836
	In July 2014, the Company’s board of directors adopted and the stockholders approved the Company’s 2014 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 administrator may, in its discretion, modify the terms of offering periods. Due to the timing of the IPO, the first offering period started July 18, 2014 and will end on February 16, 2015.  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 day of the offering period.

Net_Loss_Per_Share

Net Loss Per Share	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Net Loss Per Share	'
	8. Net Loss per Share
	The Company calculates its basic and diluted net loss per share 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 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, undistributed earnings are re-allocated to reflect the potential impact of dilutive securities.
	The Company’s basic net loss per share is calculated by dividing the net loss by the weighted-average number of shares of common stock outstanding for the period. The diluted net loss per share 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, RSUs and preferred and common stock warrants are considered common stock equivalents but have been excluded from the calculation of diluted net loss per share as their effect is antidilutive as the Company had net losses for the three months ended September 30, 2013 and 2014, and for the nine months ended September 30, 2013 and 2014.
	The following table sets forth the computation of net loss per common share (in thousands, except per share data):
		Three Months						Nine Months
		Ended September 30,						Ended September 30,
		2013			2014			2013			2014
	Net loss	$	(3,012	)	$	(1,717	)	$	(7,522	)	$	(400	)
	Weighted-average shares used in computing basic and diluted net loss per share		6,618,719			29,058,656			6,605,833			14,345,685
	Basic and diluted net loss per share	$	(0.46	)	$	(0.06	)	$	(1.14	)	$	(0.03	)
	The following securities were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented:
		Three Months						Nine Months
		Ended September 30,						Ended September 30,
		2013			2014			2013			2014
	Convertible preferred stock		15,510,314		—				15,510,314		—
	Employee stock options		1,687,805			3,964,732			3,695,466			3,964,732
	RSUs	—				747,761		—				747,761
	ESPP	—				123,817		—				123,817
	Convertible preferred stock warrants		102,161		—				102,161		—
	Total		17,300,280			4,836,310			19,307,941			4,836,310

Employee_Benefit_Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2014
Postemployment Benefits [Abstract]	'
Employee Benefit Plans	'
	9. Employee Benefit Plans
	The Company started a 401(k) Profit Sharing Plan (the Plan), effective January 1, 2009 for employees who are 21 years of age or older. According to the terms of the Plan, the Company may make a discretionary contribution to the Plan each year, allocable to all plan participants. The Company does not match employee contributions and is responsible for administrative expenses of the 401(k) Plan.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	10. 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 provision of $34 and $64 for the three months ended September 30, 2013 and 2014, respectively, and $68 and $201 for the nine months ended September 30, 2013 and 2014, respectively, related to foreign income taxes and state minimum taxes. Based on the available objective evidence during the nine months ended September 30, 2014, management believes it is more likely than not that the tax benefits of the U.S. losses incurred during the nine months ended September 30, 2014 may not be realized by the end of the 2014 fiscal year. Accordingly, the Company did not record the tax benefits of the U.S. losses incurred during the nine months ended September 30, 2014. The primary difference between the effective tax rate and the federal statutory tax rate relates to foreign tax rate differences, meals and entertainment and state and local minimum and capital taxes.
	As of September 30, 2014, the Company had no material uncertain tax positions.  Therefore, no unrecognized tax benefits were recorded for the nine months ended September 30, 2014.
	The provision for income taxes for the three and nine months ended September 30, 2013 and 2014 primarily reflects the provision for income taxes for foreign and state taxes.
	Utilization of the net operating loss carryforwards may be subject to an annual limitation due to the ownership change limitations provided by the Internal Revenue Code of 1986, as amended (the Code), and similar state provisions. Any annual limitation may result in the expiration of net operating losses before utilization.

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	11. Segment Information
	The Company considers operating segments to be components of the Company in which separate financial information is available that is evaluated regularly by the Company’s chief operating decision maker (CODM) in deciding how to allocate resources and in assessing performance. The CODM for the Company is the Chief Executive Officer. The CODM 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, which is to design, develop and market software for digital branding.
	Total revenue from customers by location is defined based on the customers’ billing address. The following table summarizes total revenue from customers for the respective locations:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2014		2013		2014
	United States	$	8,963	$	19,737	$	23,898	$	53,170
	Australia		1,157		1,776		3,440		6,687
	Canada		1,110		2,525		3,193		7,646
	All Other Countries		1,723		3,382		4,643		10,658
	Total revenue	$	12,953	$	27,420	$	35,174	$	78,161

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	12. Subsequent Events
	On October 31, 2014, the Company’s subsidiary TubeMogul Japan Inc. entered into a sale and purchase agreement with the holders of its outstanding convertible notes and shareholders, pursuant to which TubeMogul Japan Inc. reacquired the convertible notes and outstanding shares for an aggregate price of $955. The Company anticipates that the transaction will be completed in the fourth quarter of fiscal year 2014, after which the Company will own 100% of TubeMogul Japan Inc.

The_Company_and_its_Significan1

The Company and its Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

'

Use of Estimates

'

Use of Estimates

The preparation of the financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates in these condensed consolidated financial statements include allowances for doubtful accounts and credit memos, useful lives for depreciation and amortization, loss contingencies, valuation of deferred tax assets, provisions for uncertain tax positions, capitalization of software costs and assumptions used for valuation of stock-based compensation and convertible preferred stock warrant liability. Actual results could differ from those and other estimates.

Principles of Consolidation and Basis of Presentation

'

Principles of Consolidation and Basis of Presentation

These 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, and include the accounts of the Company’s wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. 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 consolidated financial statements and related notes included in the Company’s prospectus dated July 17, 2014, filed with the SEC on July 18, 2014 pursuant to Rule 424(b)(4) under the Securities Act of 1933. All of the share amounts, share prices, exercise prices and other per share information throughout these condensed consolidated financial statements have been adjusted to reflect a 2-for-1 reverse stock split that was effected on April 14, 2014.

The consolidated balance sheet as of December 31, 2013 included herein was derived from the audited financial statements as of that date. These unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, the Company’s comprehensive (loss) income and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year ending December 31, 2014 or any other period.

Revenue Recognition and Deferred Revenue

'

Revenue Recognition and Deferred Revenue

The Company recognizes revenue related to the utilization of its advertising platform. Revenue is recognized when persuasive evidence of an arrangement exists, service has been provided to the customer, collection of the fees is reasonably assured, and fees are fixed or determinable. Arrangements with customers do not provide the customer with the right to take possession of the software or platform at any time. The Company generates revenue from its platform through its Platform Direct and Platform Services offerings. Revenue for both Platform Direct and Platform Services is recognized when the advertisement is displayed. The Company’s arrangements are cancellable by the customer as to any unfulfilled portion of a campaign without penalty. Media is purchased on the Company’s platform on a real-time basis and purchasing ceases upon cancellation. In the Company’s Platform Services arrangements once the advertising is delivered in accordance with the terms of the insertion order, the related amounts earned for such advertising delivery are non-refundable.

The Company’s Platform Direct arrangements are evidenced by signed contracts. The Platform Services arrangements are evidenced through direct insertion orders. Revenue is recognized during the period in which the advertising is delivered. The Company also maintains processes to determine the collectability of amounts due from customers. To the extent any of the revenue recognition criteria are not met, the Company defers revenue.

Amounts that have been invoiced for services are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria outlined above have been met. In instances where customers prepay, the Company will defer recognition of revenue until the criteria outlined above are met and actual ads have been delivered during the period based on the terms specified in the agreement with the customer.

In accordance with ASC Topic 605, Revenue Recognition, paragraph 45-1, the Company recognizes revenue on a gross or net basis for each model based on its determination as to whether the Company is acting as the principal in the revenue generation process or as an agent.

Indicators that an entity is acting as a principal include: (a) the entity has the primary responsibility (primary obligor) for providing the goods or services to the customer or for fulfilling the order; (b) the entity has inventory risk before or after the customer order; (c) the entity has latitude in establishing prices, either directly or indirectly; and (d) the entity bears the customer’s credit risk for the amount receivable from the customer.

Indicators that an entity is acting as an agent exist when it does not have exposure to the significant risks and rewards associated with the sale of goods or the rendering of services. One key feature indicating that an entity is acting as an agent is that the amount the entity earns is predetermined, being either a fixed fee per transaction or a stated percentage of the amount billed to the customer.

Platform Direct — Platform Direct provides customers with self-serve capabilities for real-time media buying, serving, targeting, optimization and brand measurement. The Company enters into contracts with customers under which fees earned by the Company are based on a utilization fee that is a percentage of media spend through the platform as well as fees for additional features offered through the Company’s platform. These features are delivered concurrently with the related advertising. Due to the fact that the features are delivered concurrently, the Company does not allocate revenue between the two elements.

The Company recognizes revenue for Platform Direct on a net basis primarily based on the Company’s determination that it is not deemed to be the primary obligor, does not have inventory risk as the customer chooses the inventory to purchase on a real-time basis, the actual cost of the campaign is determined by the customer through the real-time bidding process, through management of the campaign the customer can define supplier preferences or specific suppliers from a list the Company maintains, and the amount earned by the Company is fixed based on a percentage of the media spend of a customer’s campaign.

Platform Services — Platform Services provide customers the opportunity to utilize the Company’s platform on a managed service basis, whereby the Company delivers digital video advertisements based upon a pre-agreed set of fixed objectives with an advertiser or agency. The Company enters into customer agreements through discrete binding insertion orders with fixed price commitments which are determined prior to the launch of an advertising campaign.

For Platform Services, the Company recognizes revenue on a gross basis primarily based on the Company’s determination that it is subject to the risk of fluctuating costs from its media vendors, has latitude in establishing prices with its customer, has discretion in selecting media vendors when fulfilling a customer’s campaign, and has credit risks.

Cost of Revenue

'

Cost of Revenue

Cost of revenue is comprised primarily of media costs. Media costs consist of advertising impressions the Company purchases from sources of advertising inventory in connection with its Platform Services offering. The Company typically pays for these impressions on a cost per thousand impression (CPM) basis. Cost of revenue also includes technical infrastructure costs which include the cost of internal and third-party servers and related services, internet access costs and amortization of internal use software development costs on revenue-producing technologies.

Capitalized Internal-Use Software Development Costs

'

Capitalized Internal-Use Software Development Costs

For web site development costs and development costs related to the Company’s platform, the Company capitalizes qualifying computer software costs which are incurred during the application development stage. Costs related to preliminary project activities and post implementation activities are expensed as incurred to research and development. 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 used as intended. Costs incurred for enhancements that are expected to result in additional material functionality are capitalized. The Company capitalized $94 and $517 in internal-use software development costs related to platform enhancement and website development cost during the three months ended September 30, 2013 and 2014, respectively, and $527 and $818 during the nine months ended September 30, 2013 and 2014, respectively. These costs are included in property, equipment and software, net on the 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, which is generally three years. Costs for research and development efforts have been expensed as incurred and relate primarily to payroll costs incurred in the development of the platform.

Cash and Cash Equivalents

'

Cash and Cash Equivalents

The Company considers all highly liquid investments having original maturities of three months or less at the date of purchase to be cash equivalents. The Company’s cash equivalents consist of short-term money market instruments. Amounts held on deposit at financial institutions may exceed Federal Deposit Insurance Corporation (FDIC) insured limits. To date, the Company has not experienced any losses on such deposits.

Restricted Cash

'

Restricted Cash

Restricted cash at December 31, 2013 and September 30, 2014 represents cash restricted for the Company’s irrevocable standby letters of credit in the amount of $334 and $742, respectively for the benefit of certain of the Company’s real property lessors.

Accounts Receivable

'

Accounts Receivable

Accounts receivable are stated at net realizable value. The Company provides an allowance for doubtful accounts based on management’s evaluation of outstanding accounts receivable. The Company maintains reserves for potential credit losses on customer accounts when deemed necessary. The Company analyzes specific accounts receivable, historical bad debts, customer concentrations, current economic trends, and changes in the customer payment terms when evaluating the adequacy of the allowance for bad debts. Accounts receivable are written off when no future collection is possible.

Many of the Company’s contracts with advertising agencies provide that if the brand (i.e., the agency’s customer) does not pay the agency, the agency is not liable to the Company and the Company must seek payment from the brand. Accordingly, the Company considers the creditworthiness of the brand in establishing its allowance for doubtful accounts. However, since inception, the Company has not had to initiate collection efforts directly with any brands where the contract was with an advertising agency.

The following table presents the changes in the allowance for doubtful accounts:

Year Ended

Nine months Ended

December 31,

September 30,

2013

2014

Balance, beginning of period

$

(350

)

$

(714

)

Additions to allowance

(539

)

(1,699

)

Write offs, net of recoveries

175

1,060

Balance, end of period

$

(714

)

$

(1,353

)

Property, Equipment and Software, net

'

Property, Equipment and Software, net

Property, equipment and software, net are carried at cost and are depreciated on the straight-line basis over their estimated useful lives of three to seven years. Repairs and maintenance are charged to expense as incurred, and improvements are capitalized. When the assets are sold or retired or otherwise disposed of, their cost and related accumulated depreciation and amortization are removed from the accounts with the resulting gain or loss reflected as an operating item in the accompanying consolidated statements of operations.

Leasehold improvements are amortized on a straight-line basis over the remaining term of the lease, or the useful life of the assets, whichever is shorter.

Construction in process mainly consists of leasehold improvements and furniture at the Company’s offices under construction, as well as server equipment that has not been placed in service as of September 30, 2014. Upon completion of construction and commencement of the use of the server, the assets will be depreciated over the shorter of their useful lives or the remaining lease term.

Fair Value Measurement and Financial Instruments

'

Fair Value Measurement and Financial Instruments

The Company measures the fair value of its financial instruments in accordance with of the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) for Fair Value Measurements. Under this standard, fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the exit price) in an orderly transaction between market participants at the measurement date. In determining fair values of all reported assets and liabilities that represent financial instruments, the Company uses the carrying market values of such amounts. The provision establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company.

Unobservable inputs are inputs that reflect the Company’s assumptions as to what market participants would use in pricing the asset or liability developed based on the best information available under the circumstances. The hierarchy is broken down into three levels based on the observability of inputs as follows:

Level 1 — Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date.

Level 2 — Other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability.

Level 3 — Unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at measurement date.

The following table sets forth by level, within the fair value hierarchy, the Company’s assets and liabilities at December 31, 2013 and September 30, 2014, measured at fair value on a recurring basis:

Financial Instruments at Fair  Value as of December 31, 2013

Level 1

Level 2

Level 3

Total

Assets:

Cash equivalents-money market

$

19,475

$

—

$

—

$

19,475

Liability:

Warrant Liability

$

—

$

—

$

684

$

684

Financial Instruments at Fair  Value as of September 30, 2014

Level 1

Level 2

Level 3

Total

Assets:

Cash equivalents-money market

$

48,199

$

—

$

—

$

48,199

Liability:

Warrant Liability

$

—

$

—

$

—

$

—

In fiscal year 2010, the Company issued a Series A-1 preferred stock warrant that contained a price protection clause that provides that the exercise price of the warrants is to be adjusted downwards upon the Company issuing Additional Stock (as defined in the warrant agreement) at more favorable pricing. As a result of this price protection clause, the Company determined that the warrant is not considered indexed to the Company’s own stock and as a result recorded the warrant as a liability measured at fair value at the time of issuance. The Company records “mark-to-market” adjustments each reporting period under other income expense, net. As the warrant’s fair value is based on significant inputs that are not observable in the market, they are categorized as Level 3. Changes in warrant liability (see Note 4) consisted of the following during:

Year Ended

Nine months Ended

December 31,

September 30,

2013

2014

Balance, beginning of period

$

296

$

684

Change in fair value of convertible preferred stock warrant liability

388

(168

)

Conversion of warrants to common stock

—

(516

)

Balance, end of period

$

684

$

—

Since all carrying amounts of these investments approximate fair value, no other comprehensive income or loss has been recognized. There were no sales, purchases, settlements, or transfers in or out of Level 3 liabilities.

Other financial instruments not measured at fair value on the accompanying consolidated balance sheets at December 31, 2013 and September 30, 2014, but which require disclosure of their fair values include accounts receivable, accounts payable, accrued expenses and debt. The estimated fair values of such instruments at December 31, 2013 and September 30, 2014 approximated their carrying values. The fair values of all of these instruments are categorized as Level 2 in the fair value hierarchy.

Quantitative Information about Level 3 Fair Value Measurements

The significant unobservable inputs used in the fair value measurement of the Company’s convertible preferred stock warrant:

Fair Value

Fair Value

Significant

at December 31,

September 30,

Valuation

unobservable

2013

2014

technique

input

Convertible preferred warrant liability

$

684

$

—

Monte Carlo Simulation

Value of underlying

Series A-1 preferred stock, volatility, and expected term.

Sensitivity to Changes in Significant Unobservable Inputs

The significant unobservable inputs used in the fair measurement of the warrant are the volatility of the underlying stock value, expected term, and the value of the Company’s Series A-1 preferred stock. Significant increases (decreases) in these unobservable inputs in isolation could result in a significantly different fair value measurement.

Income Taxes

'

Income Taxes

The Company accounts for income taxes in accordance with FASB ASC Topic 740, Income Taxes, under which deferred tax liabilities and assets are recognized for the expected future tax consequences of temporary differences between the financial reporting and tax basis of assets and liabilities, as well as for operating loss (NOL) and tax credit carryforwards. Deferred tax assets and liabilities are measured using the tax rates that are expected to apply to taxable income for the years in which those tax assets and liabilities are expected to be realized or settled. The Company records a valuation allowance to reduce their deferred tax assets to the net amount that is more likely than not to be realized.

The Company utilizes a two-step approach to evaluate tax positions. Recognition, step one, requires evaluation of the tax position to determine if based solely on technical merits it is more likely than not (MLTN) to be sustained upon examination. The MLTN standard is met when the likelihood of occurrence is greater than 50%. Measurement, step two, is addressed only if step one is satisfied. In step two, the tax benefit is measured as the largest amount of benefit, determined on a cumulative probability basis, which is MLTN to be realized upon ultimate settlement with tax authorities. If a position does not meet the MLTN threshold for recognition in step one, no benefit is recorded until the first subsequent period in with the MLTN standard is met, the issue is resolved with the tax authority, or the statute of limitations expires. Positions previously recognized are derecognized when the Company subsequently determines that the position is no longer MLTN to be sustained.

The Company recognizes interest and penalties related to income taxes in its provision for income tax.

Accounting for Impairment of Long-Lived Assets

'

Accounting for Impairment of Long-Lived Assets

The Company evaluates the recoverability of property, equipment and software and other assets, including identifiable intangible assets with definite lives, whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets held and used is measured by comparison of the carrying amount of an asset or an asset group to estimated undiscounted future net cash flows expected to be generated by the asset or asset group. If the carrying amount of an asset exceeds these estimated future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the assets exceeds the fair value of the asset or asset group, based on discounted cash flows. Assets to be disposed of are reported at the lower of their carrying amount or fair value less cost to sell. There were no impairment charges recorded in any of the periods presented.

Advertising Costs

'

Advertising Costs

The Company’s policy is to expense all advertising costs as incurred. Advertising expense includes costs for user conferences, tradeshows, print marketing and design consulting. Advertising expense was $946 and $1.6 million for the three months ended September 30, 2013 and 2014, respectively, and was $2.3 million and $3.2 million for the nine months ended September 30, 2013 and 2014, respectively, and is included in sales and marketing expense in the accompanying condensed consolidated statements of operations.

Stock-Based Compensation

'

Stock-Based Compensation

The Company’s stock-based compensation expense is estimated at the grant date based on the fair value of the award and is recognized as expense ratably over the requisite service period of the award. Determining the appropriate fair value and calculating the fair value of share-based awards requires judgment, including estimating share price volatility, forfeiture rates, expected dividends, and expected life. The Company calculates the fair value of each restricted stock unit award to employees on the date of grant and to non-employees on each measurement date based on the fair value of its common stock. The Company calculates the fair value of each option award on the date of grant under the Black-Scholes option pricing model using certain assumptions. For nonemployee consultants, the Company revalues the unvested options at each measurement period.

The Black-Scholes model requires the use of highly subjective and complex assumptions, which determine the fair value of share-based awards, including the option’s expected term and the price volatility of the underlying stock. The Company’s current estimate of volatility is based on the volatility of comparable public companies. To the extent volatility of the Company’s stock price increases in the future, the Company’s estimates of the fair value of options granted in the future could increase, thereby increasing stock-based compensation in future periods. The computation of expected lives was based on expectations of future employee behavior. The interest rate for periods within the contractual life of the award is based on the U.S. Treasury yield curve in effect at the time of grant. In addition, the Company applies an expected forfeiture rate when amortizing stock-based compensation. To the extent the Company revises this estimate in the future; its stock-based compensation could be materially impacted in the year of revision.

Segments

'

Segments

The Company’s chief operating decision maker (CODM), its Chief Executive Officer, reviews financial information for the Company on a consolidated basis. The Company manages its business on the basis of one operating segment. The Company’s principal decision-making functions are located in the United States.

Earnings Per Share

'

Earnings Per Share

The Company applies the two-class method for calculation and presenting earnings per share. Under the two-class method, net income is allocated between common units and other participating securities based on their participating rights. Participating securities are defined as securities that participate in dividends with common units according to a pre-determined formula or a contractual obligation to share in the income of the entity. Upon the conversion of the preferred stock and preferred stock warrants at the time of the IPO, there are no other participating securities outstanding. Basic net (loss) income per common unit is calculated by dividing the net income by the weighted-average number of common units outstanding for the period. Diluted net income per share is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period. Due to the net losses for the three and nine months ended September 30, 2013 and 2014, there is no impact or change in presentation as a result of applying the two-class method.

Concentration of Risk

'

Concentration of Risk

As of December 31, 2013, one customer accounted for 14% of outstanding gross accounts receivable. This customer is an advertising agency. There were no customers that accounted for more than 10% of revenue during the year ended December 31, 2013. Branches or divisions of an advertiser that operate under distinct contracts are generally considered as separate customers. In particular, the Company treats as separate customers different groups within global advertising agencies if they are based in different jurisdictions or with respect to which the Company negotiated and manages separate contractual relationships.

Three media vendors individually accounted for 26%, 18% and 12% of total media cost for the year ended December 31, 2013.

Foreign Currency Transactions and Translations

'

Foreign Currency Translation and Transactions

The consolidated financial statements of the Company’s foreign subsidiaries are measured using the local currency as the functional currency. Assets and liabilities of foreign subsidiaries are translated at exchange rates in effect as of the balance sheet date. Revenues and expenses are translated at average exchanges rates in effect during the period. Translation adjustments are recorded within accumulated other comprehensive loss, a separate component of stockholders’ equity, on the accompanying consolidated balance sheets. Foreign exchange gain (loss) is impacted by movements in exchange rates and the amount of foreign-currency denominated receivables and payables. The foreign exchange loss in the three months and nine months ended September 30, 2014 was primarily attributable to the strengthening of the U.S. Dollar in relation to the Australian Dollar, Canadian Dollar, British Pound and Euro for foreign-currency denominated transactions.

Deferred Offering Costs

'

Deferred Offering Costs

Deferred offering costs consisted primarily of direct incremental costs related to the Company’s initial public offering (IPO) of its common stock. The Company recorded $129 of deferred offering costs in other assets on the Company’s condensed consolidated balance sheets as of December 31, 2013. No deferred offering costs are included as of September 30, 2014. Upon completion of the IPO, the deferred offering costs of $3.3 million were offset against the proceeds of the offering.

Recent Accounting Pronouncements

'

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board issued guidance related to revenue from contracts with customers. Under this guidance, revenue is recognized when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. The updated standard will replace most existing revenue recognition guidance under U.S. generally accepted accounting principles (GAAP) when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. Early adoption is not permitted. The updated standard will be effective for us in the first quarter of 2017. The Company has not yet selected a transition method and is currently evaluating the effect that the updated standard it will have on its consolidated financial statements and related disclosures.

The_Company_and_its_Significan2

The Company and its Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Schedule of Allowance for Doubtful accounts	'
	The following table presents the changes in the allowance for doubtful accounts:
		Year Ended			Nine months Ended
		December 31,			September 30,
		2013			2014
	Balance, beginning of period	$	(350	)	$	(714	)
	Additions to allowance		(539	)		(1,699	)
	Write offs, net of recoveries		175			1,060
	Balance, end of period	$	(714	)	$	(1,353	)
Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis	'
	The following table sets forth by level, within the fair value hierarchy, the Company’s assets and liabilities at December 31, 2013 and September 30, 2014, measured at fair value on a recurring basis:
		Financial Instruments at Fair  Value as of December 31, 2013
		Level 1			Level 2			Level 3			Total
	Assets:
	Cash equivalents-money market	$	19,475		$	—		$	—		$	19,475
	Liability:
	Warrant Liability	$	—		$	—		$	684		$	684
		Financial Instruments at Fair  Value as of September 30, 2014
		Level 1			Level 2			Level 3			Total
	Assets:
	Cash equivalents-money market	$	48,199		$	—		$	—		$	48,199
	Liability:
	Warrant Liability	$	—		$	—		$	—		$	—
Schedule of Changes in Warrant Liability	'
	Changes in warrant liability (see Note 4) consisted of the following during:
		Year Ended			Nine months Ended
		December 31,			September 30,
		2013			2014
	Balance, beginning of period	$	296		$	684
	Change in fair value of convertible preferred stock warrant liability		388			(168	)
	Conversion of warrants to common stock		—			(516	)
	Balance, end of period	$	684		$	—
Schedule of Significant Unobservable Inputs Used in Fair Value Measurement of the Company's Convertible Preferred Stock Warrant	'
	The significant unobservable inputs used in the fair value measurement of the Company’s convertible preferred stock warrant:
		Fair Value			Fair Value					Significant
		at December 31,			September 30,			Valuation		unobservable
		2013			2014			technique		input
	Convertible preferred warrant liability	$	684		$	—		Monte Carlo Simulation		Value of underlying
										Series A-1 preferred stock, volatility, and expected term.

Property_Equipment_and_Softwar1

Property, Equipment and Software (Tables)	9 Months Ended
	Sep. 30, 2014
Property Plant And Equipment [Abstract]	'
Schedule of Property, Equipment and Software	'
	Property, equipment and software as of December 31, 2013 and September 30, 2014 consisted of the following:
		December 31,			September 30,
		2013			2014
	Computer and office equipment	$	607		$	1,055
	Capitalized internal use software costs		636			914
	Furniture and fixtures		369			976
	Software		73			168
	Leasehold improvements		202			752
	Construction in process	—				1,016
			1,887			4,881
	Less accumulated depreciation and amortization		(420	)		(964	)
	Total	$	1,467		$	3,917

Accrued_Liabilities_Tables

Accrued Liabilities (Tables)	9 Months Ended
	Sep. 30, 2014
Accounts Payable And Accrued Liabilities Current [Abstract]	'
Schedule of Accrued Liabilities	'
	Accrued liabilities at December 31, 2013 and September 30, 2014, consisted of the following:
		December 31,		September 30,
		2013		2014,
	Accrued media costs	$	28,603	$	19,525
	Sales commissions		1,296		1,833
	Payroll and related expenses		1,750		2,586
	Other accrued expenses		1,321		1,011
	Customer rebates		1,444		883
		$	34,414	$	25,838

Debt_Obligations_Tables

Debt Obligations (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Future Principal Payments of Long-Term Debt	'
	Future principal payments of long-term debt as of September 30, 2014 were as follows:
	2014 (remaining 3 months)	$	363
	2015		1,364
	Total	$	1,727
	Discount		(5	)
	Less current portion		(1,470	)
	Noncurrent portion of debt	$	252
Fair Value of Warrants	'
	The following assumptions were used at December 31, 2013 and July 23, 2014 (date of warrant conversion):
		December 31,			July 23,
		2013			2014
	Risk-free interest rate		3.04	%		2.53	%
	Expected volatility		80	%		80	%
	Expected lives	6.3 years			5.8 years
	Fair value of underlying equity	$	9.4		$	7

Stockholders_Equity_Tables

Stockholders Equity (Tables)	9 Months Ended
	Sep. 30, 2014
Stockholders Equity Note [Abstract]	'
Convertible Preferred Stock Financing	'
	The following table presents the shares authorized and issued and outstanding as of the periods presented:
					Shares			Issuance
		Shares			Issued and			Price Per		Carrying		Liquidation
		Authorized			Outstanding			Share		Value(1)		Preference
	Series A		4,177,390			1,257,838		$	1.21	$	1,448	$	1,525
	Series A	—				830,866			0.9093		756		1,007
	Series A-1		7,847,028			3,675,129			0.8748		3,128		3,215
	Series A-1	—				171,228			0.6998		120		150
	Series B		10,298,658			5,149,330			1.942		9,896		10,000
	Series C		8,851,871			4,425,939			6.4748		28,564		28,658
	Common stock, $0.001 par value		62,000,000			6,674,757
	Balance as of December 31, 2013		93,174,947			22,185,087				$	43,912	$	44,555
	Converted		(31,174,947	)		(15,510,330	)
	Preferred stock as of September 30, 2014		10,000,000		—
	Common stock, $0.001 par value as of September 30, 2014		200,000,000			29,790,224
	-1	Amounts are net of issuance costs.

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Schedule of Commitments for Minimum Rentals Under Operating Lease	'
	The Company’s commitments for minimum rentals under these leases as of September 30, 2014 are as follows:
		Operating
		leases
	2014 (remaining 3 months)		1,370
	2015		1,735
	2016		1,544
	2017		1,085
	2018		889
	Thereafter		1,694
	Total minimum lease payments	$	8,317

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2014
Summary of Stock Option Plan	'
	The following table summarizes the Plan’s stock option activity:
					Weighted-				Weighted
					average				average
		Outstanding			exercise				remaining		Aggregate
		number of			price per				contractual		intrinsic
		shares			share				life		value
	Balance at December 31, 2013		4,290,057		$	1.28				8	$	24,973
	Options granted		140,500			7.38
	Options exercised		(324,357	)		0.85
	Options canceled		(141,468	)		2.44
	Balance at September 30, 2014		3,964,732		$	1.49				7.37	$	41,596
	Options exercisable and vested at September 30, 2014		2,229,532		$	0.81				6.46	$	24,897
	Options vested and expected to vest at September 30, 2014		3,750,090		$	1.42				7.29	$	39,605
Schedule of Share-based Compensation, Restricted Stock Units Award Activity	'
	The following table summarizes the Plan’s RSUs activity:
					Weighted-				Weighted
		Outstanding			Average				average
		number of			Grant Date				remaining
		shares			Fair Value				contractual life
	Balance at December 31, 2013		—		$	—				—
	RSUs granted		796,540			11				1.8
	RSUs canceled		(48,779	)		10				—
	Balance at September 30, 2014		747,761		$	11				1.8
Summary of Effects of Stock-Based Compensation	'
	The following table summarizes the effects of share-based compensation in the Company’s accompanying consolidated statements of operations:
		Three Months							Nine Months
		Ended September 30,							Ended September 30,
		2013			2014				2013		2014
	Research and development	$	46		$	283			$	96	$	594
	Sales and marketing		88			244				151		577
	General and administrative		79			261				197		665
	Total stock-based compensation	$	213		$	788			$	444	$	1,836
Employees	'
Schedule of Assumptions Used to Calculate Fair Value of Options	'
	The following assumptions were used to calculate the fair value of options for employees:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2013				2013		2014
	Risk-free interest rate		1.60%			1.2% to 1.6%		1.8% to 2.0%
	Dividend yield	—  %				—  %		—  %
	Volatility		68%			68% to 69%		66% to 67%
	Expected term	6.1 years				5.2 to 6.1 years		6.0 to 6.4 years
Non-Employees	'
Schedule of Assumptions Used to Calculate Fair Value of Options	'
	The following assumptions were used to calculate the fair value of options for non-employees:
		Three Months Ended September 30,			Nine Months Ended September 30,
		2013		2014	2013		2014
	Risk-free interest rate	0.8% to 2.5%		2.0% to 2.4%	0.8% to 2.5%		2.0% to 2.4%
	Dividend yield	—  %		—  %	—  %		—  %
	Volatility	64% to 72%		63% to 65%	64% to 72%		63% to 65%
	Expected term	5 to 9.3 years		6.0 to 8.7 years	5 to 9.3 years		6.0 to 8.7 years

Net_Loss_Per_Share_Tables

Net 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 common share (in thousands, except per share data):
		Three Months						Nine Months
		Ended September 30,						Ended September 30,
		2013			2014			2013			2014
	Net loss	$	(3,012	)	$	(1,717	)	$	(7,522	)	$	(400	)
	Weighted-average shares used in computing basic and diluted net loss per share		6,618,719			29,058,656			6,605,833			14,345,685
	Basic and diluted net loss per share	$	(0.46	)	$	(0.06	)	$	(1.14	)	$	(0.03	)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	'
	The following securities were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented:
		Three Months						Nine Months
		Ended September 30,						Ended September 30,
		2013			2014			2013			2014
	Convertible preferred stock		15,510,314		—				15,510,314		—
	Employee stock options		1,687,805			3,964,732			3,695,466			3,964,732
	RSUs	—				747,761		—				747,761
	ESPP	—				123,817		—				123,817
	Convertible preferred stock warrants		102,161		—				102,161		—
	Total		17,300,280			4,836,310			19,307,941			4,836,310

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Schedule of Total Revenue from Customers By Location	'
	Total revenue from customers by location is defined based on the customers’ billing address. The following table summarizes total revenue from customers for the respective locations:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2014		2013		2014
	United States	$	8,963	$	19,737	$	23,898	$	53,170
	Australia		1,157		1,776		3,440		6,687
	Canada		1,110		2,525		3,193		7,646
	All Other Countries		1,723		3,382		4,643		10,658
	Total revenue	$	12,953	$	27,420	$	35,174	$	78,161

The_Company_and_its_Significan3

The Company and its Significant Accounting Policies - Additional Information (Details) (USD $)	0 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 23, 2014	Apr. 14, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
							Customer
Schedule Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Proceeds from issuance of common stock in initial public offering, net of underwriting discounts and commission	$46,800,000	'	'	'	$46,791,000	'	'
Reverse stock split ratio, description	'	'all of the share amounts, share prices, exercise prices and other per share information throughout these condensed consolidated financial statements have been adjusted to reflect a 2-for-1 reverse stock split	'	'	'	'	'
Reverse stock split ratio	'	0.5	'	'	'	'	'
Restricted cash	'	'	742,000	'	742,000	'	334,000
Transfers in or out	'	'	'	'	0	'	0
Impairment charges	'	'	'	'	0	'	0
Advertising expense	'	'	1,600,000	946,000	3,200,000	2,300,000	'
Number of customer accounted for 14% of gross accounts receivable	'	'	'	'	'	'	1
Number of customer accounted for more than 10% of revenue	'	'	'	'	'	'	0
Deferred offering costs	'	'	0	'	0	'	129,000
Accounts Receivable	'	'	'	'	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Concentration risk, percentage	'	'	'	'	'	'	14.00%
Cost of Services | Media Vendor One	'	'	'	'	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Concentration risk, percentage	'	'	'	'	'	'	26.00%
Cost of Services | Media Vendor Two	'	'	'	'	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Concentration risk, percentage	'	'	'	'	'	'	18.00%
Cost of Services | Media Vendor Three	'	'	'	'	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Concentration risk, percentage	'	'	'	'	'	'	12.00%
Minimum	'	'	'	'	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Property, equipment and software net, estimated useful lives	'	'	'	'	'3 years	'	'
Maximum	'	'	'	'	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Property, equipment and software net, estimated useful lives	'	'	'	'	'7 years	'	'
Software Development	'	'	'	'	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Capitalized internal-use software development costs	'	'	517,000	94,000	818,000	527,000	'
Estimated useful life of intangible assets	'	'	'	'	'3 years	'	'
Common Stock	'	'	'	'	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Issuance of common stock from initial public offering, net of issuance costs, Shares	'	'	'	'	7,187,500	'	'
Proceeds from issuance of common stock in initial public offering, net of underwriting discounts and commission	'	'	'	'	46,800,000	'	'
IPO	'	'	'	'	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Issuance of common stock from initial public offering, net of issuance costs, Shares	7,187,500	'	'	'	'	'	'
Issuance price per share	$7	'	'	'	'	'	'
Deferred offering costs	'	'	3,300,000	'	3,300,000	'	'
IPO | Common Stock	'	'	'	'	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Issuance of common stock from initial public offering, net of issuance costs, Shares	7,187,500	'	'	'	'	'	'
Issuance price per share	$7	'	'	'	'	'	'
Estimated offering expenses	$3,300,000	'	'	'	'	'	'
IPO | Common Stock | Underwriters	'	'	'	'	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Issuance of common stock from initial public offering, net of issuance costs, Shares	937,500	'	'	'	'	'	'

The_Company_and_its_Significan4

The Company and its Significant Accounting Policies - Schedule of Allowance for Doubtful Accounts (Details) (Doubtful Accounts Receivables and Credit Memos, USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Doubtful Accounts Receivables and Credit Memos	'	'
Accounts Notes And Loans Receivable [Line Items]	'	'
Balance, beginning of period	($714)	($350)
Additions to allowance	-1,699	-539
Write offs, net of recoveries	1,060	175
Balance, end of period	($1,353)	($714)

The_Company_and_its_Significan5

The Company and its Significant Accounting Policies - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'
Financial liabilities	$0	$684	$296
Level 3	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'
Financial liabilities	0	684	'
Recurring Basis	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'
Financial assets	48,199	19,475	'
Financial liabilities	0	684	'
Recurring Basis | Level 1	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'
Financial assets	48,199	19,475	'
Financial liabilities	0	0	'
Recurring Basis | Level 2	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'
Financial liabilities	0	0	'
Recurring Basis | Level 3	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'
Financial liabilities	$0	$684	'

The_Company_and_its_Significan6

The Company and its Significant Accounting Policies - Schedule of Changes in Warrant Liability (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Abstract]	'	'	'	'	'
Balance, beginning of period	'	'	$684	$296	$296
Change in fair value of convertible preferred stock warrant liability	0	36	-168	55	388
Conversion of warrants to common stock	'	'	-516	'	'
Balance, end of period	$0	'	$0	'	$684

The_Company_and_its_Significan7

The Company and its Significant Accounting Policies - Schedule of Significant Unobservable Inputs Used in Fair Value Measurement of Convertible Preferred Stock Warrant (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified				Level 3	Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'	'
Financial liabilities	$0	$684	$296	$0	$684
Valuation technique	'	'	'	'Monte Carlo Simulation	'
Significant unobservable input	'	'	'	'Value of underlying Series A-1 preferred stock,volatility, and expected term.	'

Property_Equipment_and_Softwar2

Property, Equipment and Software - Schedule of Property, Equipment and Software (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property Plant And Equipment [Line Items]	'	'
Property, equipment and software, gross	$4,881	$1,887
Less accumulated depreciation and amortization	-964	-420
Total	3,917	1,467
Computer and Office Equipment	'	'
Property Plant And Equipment [Line Items]	'	'
Property, equipment and software, gross	1,055	607
Capitalized Internal Use Software Costs	'	'
Property Plant And Equipment [Line Items]	'	'
Property, equipment and software, gross	914	636
Furniture and Fixtures	'	'
Property Plant And Equipment [Line Items]	'	'
Property, equipment and software, gross	976	369
Software	'	'
Property Plant And Equipment [Line Items]	'	'
Property, equipment and software, gross	168	73
Leasehold Improvements	'	'
Property Plant And Equipment [Line Items]	'	'
Property, equipment and software, gross	752	202
Construction in Process	'	'
Property Plant And Equipment [Line Items]	'	'
Property, equipment and software, gross	$1,016	'

Property_Equipment_and_Softwar3

Property, Equipment and Software - Additional Information (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
Property Plant And Equipment [Line Items]	'	'	'	'
Depreciation and amortization expense	'	'	$549	$198
Production Assets Other than Internal Use Software	'	'	'	'
Property Plant And Equipment [Line Items]	'	'	'	'
Depreciation and amortization expense	172	71	372	151
Capitalized Internal Use Software Costs	'	'	'	'
Property Plant And Equipment [Line Items]	'	'	'	'
Depreciation and amortization expense	$68	$33	$177	$47

Accrued_Liabilities_Schedule_o

Accrued Liabilities - Schedule of Accrued Liabilities (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Payables And Accruals [Abstract]	'	'
Accrued media costs	$19,525	$28,603
Sales commissions	1,833	1,296
Payroll and related expenses	2,586	1,750
Other accrued expenses	1,011	1,321
Customer rebates	883	1,444
Total accrued liabilities	$25,838	$34,414

Debt_Obligations_Growth_Capita

Debt Obligations - Growth Capital Term-Debt and Working Capital Line of Credit - Additional Information (Details) (USD $)	0 Months Ended		9 Months Ended
	Apr. 18, 2014	Aug. 21, 2013	Sep. 30, 2014
Line Of Credit Facility [Line Items]	'	'	'
Warrant discount	'	'	$5,000
Net balance of capital loan	'	'	1,727,000
Available borrowing with revolving line of credit	'	'	33,600,000
Line of credit facility exceeds borrowing capacity to maintain ratio	'	'	10,000,000
Outstanding borrowing	'	'	0
Revolving Credit Facility	'	'	'
Line Of Credit Facility [Line Items]	'	'	'
Line of credit facility, maximum borrowing capacity	35,000,000	20,000,000	'
Term loan interest rate	'	4.75%	'
Percentage of eligible accounts receivable	'	80.00%	'
Capital loan	'	1,730,000	'
Warrant discount	'	5,000	'
Net balance of capital loan	'	1,720,000	'
Line of credit facility expiration date	1-Apr-16	'	'
Line of credit facility, covenant terms	'	'	'Under the amended and restated loan and security agreement, as amended, the Company may borrow under the revolving line of credit up to the lesser of (a) $35 million, and (b) a borrowing base equal to 80% of eligible accounts receivable as defined in the agreement, as amended. If the Company’s trailing nine-month EBITDA as defined in the amendment is less than $1,000,000, then the outstanding amount of advances under the equipment loan facility are deducted from availability. Advances under the line of credit accrue interest at a floating per annum rate equal to the Western Edition Wall Street Journal prime rate. While the interest rate applicable to outstanding advances under the revolving line did not change under the amendment, the Company is now required to pay a minimum amount of interest equal to the amount of interest that would accrue per quarter on a notional outstanding principal balance of $2 million, or $1 million if the Company maintains more than $50 million in deposits with the lender.
Lender Deposits	'	'	50,000,000
Line of credit facility, applicable margin	0.50%	'	'
Revolving Credit Facility | E B I T D A	'	'	'
Line Of Credit Facility [Line Items]	'	'	'
Line of credit facility, maximum borrowing capacity	'	'	1,000,000
Revolving Credit Facility | Maximum	'	'	'
Line Of Credit Facility [Line Items]	'	'	'
Investment Owned, Balance, Principal Amount	'	'	2,000,000
Revolving Credit Facility | Minimum	'	'	'
Line Of Credit Facility [Line Items]	'	'	'
Investment Owned, Balance, Principal Amount	'	'	1,000,000
Growth Capital Term Debt	'	'	'
Line Of Credit Facility [Line Items]	'	'	'
Line of credit facility, maximum borrowing capacity	'	4,250,000	'
Equipment Term Loan Facility	'	'	'
Line Of Credit Facility [Line Items]	'	'	'
Line of credit facility, maximum borrowing capacity	$3,000,000	'	'
Line of credit facility expiration date	31-Dec-14	'	'

Debt_Obligations_Future_Princi

Debt Obligations - Future Principal Payments of Long-Term Debt (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]	'	'
2014 (remaining 3 months)	$363	'
2015	1,364	'
Total	1,727	'
Discount	-5	'
Less current portion	-1,470	-1,416
Note payable, net of current portion and discount	$252	$1,363

Debt_Obligations_Warrants_Addi

Debt Obligations - Warrants - Additional Information (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended			0 Months Ended	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Aug. 15, 2014	Jul. 23, 2014	Sep. 30, 2014	Mar. 31, 2010
							Series A-1	Series A-1	Monte Carlo Simulation	Monte Carlo Simulation
								Additional Paid-in Capital	Series A-1	Series A-1
Class Of Warrant Or Right [Line Items]	'	'	'	'	'	'	'	'	'	'
Number of preferred stock purchased by warrants	'	'	'	'	'	'	'	'	'	77,161
Shares purchased by issuance of warrant, price per share	'	'	'	'	'	'	'	'	'	$0.87
Expiration period of warrant	'	'	'	'	'	'	'	'	'10 years	'
Conversion of convertible preferred stock warrants to common stock	'	'	$82	'	'	'	'	$516	'	'
Conversion of preferred stock warrants to common stock	'	'	'	'	'	'	69,895	'	'	'
Fair value warrant issued	56	'	56	'	'	'	'	'	'	'
Debt instrument amortization period	'	'	'3 years	'	'	'	'	'	'	'
Convertible preferred stock warrant liability	0	'	0	'	684	296	'	'	'	'
Loss (gain) on change in value of convertible preferred stock warrant liability	$0	$36	($168)	$55	$388	'	'	'	'	'

Debt_Obligations_Fair_Value_of

Debt Obligations - Fair Value of Warrants (Details) (USD $)	0 Months Ended	12 Months Ended
	Jul. 23, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]	'	'
Risk-free interest rate	2.53%	3.04%
Expected volatility	80.00%	80.00%
Expected lives	'5 years 9 months 18 days	'6 years 3 months 18 days
Fair value of underlying equity	$7	$9.40

Debt_Obligations_TubeMogul_Jap

Debt Obligations - TubeMogul Japan Inc. Financing - Additional Information (Details) (USD $)	1 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2013	Dec. 31, 2012	Sep. 30, 2013
	Investors
Class Of Warrant Or Right [Line Items]	'	'	'
Proceeds from issuance of convertible note	$187	$232	$218
Number of new Investors	3	'	'
Board of Directors	'	'	'
Class Of Warrant Or Right [Line Items]	'	'	'
Number of new Investors	1	'	'

Stockholders_Equity_Additional

Stockholders Equity - Additional Information (Details) (USD $)	0 Months Ended	9 Months Ended
	Jul. 23, 2014	Sep. 30, 2014	Dec. 31, 2013
Class Of Stock [Line Items]	'	'	'
Proceeds from issuance of common stock in initial public offering, net of underwriting discounts and commission	$46,800,000	$46,791,000	'
Common stock, shares issued	29,683,122	29,790,224	6,674,757
Common stock, shares outstanding	29,683,122	29,790,224	6,674,757
Convertible preferred stock, shares outstanding	0	'	'
Common stock, shares authorized	'	200,000,000	62,000,000
Convertible preferred stock, shares authorized	'	10,000,000	93,174,947
IPO	'	'	'
Class Of Stock [Line Items]	'	'	'
Issuance of common stock from initial public offering, net of issuance costs, Shares	7,187,500	'	'
Issuance price per share	$7	'	'
Expense related to underwriting discounts and commissions	$3,300,000	'	'
Common stock, shares authorized	200,000,000	'	'
Convertible preferred stock, shares authorized	10,000,000	'	'
Over allotment option	'	'	'
Class Of Stock [Line Items]	'	'	'
Issuance of common stock from initial public offering, net of issuance costs, Shares	937,500	'	'

Stockholders_Equity_Convertibl

Stockholders Equity - Convertible Preferred Stock Financing (Details) (USD $)	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Class Of Stock [Line Items]	'	'
Convertible preferred stock, shares authorized	10,000,000	93,174,947
Common stock, shares authorized	200,000,000	62,000,000
Converted Shares Authorized	-31,174,947	'
Shares issued and outstanding	'	22,185,087
Common stock during shares issued and outstanding	29,790,224	6,674,757
Converted, Shares issued and outstanding	-15,510,330	'
Carrying value	'	$43,912
Liquidation preference	'	44,555
Series A	'	'
Class Of Stock [Line Items]	'	'
Convertible preferred stock, shares authorized	'	4,177,390
Shares issued and outstanding	'	1,257,838
Issuance price per share	'	$1.21
Carrying value	'	1,448
Liquidation preference	'	1,525
Convertible Preferred Series A	'	'
Class Of Stock [Line Items]	'	'
Shares issued and outstanding	'	830,866
Issuance price per share	'	$0.91
Carrying value	'	756
Liquidation preference	'	1,007
Series A-1	'	'
Class Of Stock [Line Items]	'	'
Convertible preferred stock, shares authorized	'	7,847,028
Shares issued and outstanding	'	3,675,129
Issuance price per share	'	$0.87
Carrying value	'	3,128
Liquidation preference	'	3,215
Convertible Preferred Series A-1	'	'
Class Of Stock [Line Items]	'	'
Shares issued and outstanding	'	171,228
Issuance price per share	'	$0.70
Carrying value	'	120
Liquidation preference	'	150
Series B	'	'
Class Of Stock [Line Items]	'	'
Convertible preferred stock, shares authorized	0	10,298,658
Shares issued and outstanding	'	5,149,330
Issuance price per share	'	$1.94
Carrying value	'	9,896
Liquidation preference	'	10,000
Series C	'	'
Class Of Stock [Line Items]	'	'
Convertible preferred stock, shares authorized	0	8,851,871
Shares issued and outstanding	'	4,425,939
Issuance price per share	'	$6.47
Carrying value	'	28,564
Liquidation preference	'	$28,658

Commitments_and_Contingencies_1

Commitments and Contingencies - Commitments For Minimum Rentals Under Operating Lease (Details) (USD $)	Sep. 30, 2014
In Thousands, unless otherwise specified
Commitments And Contingencies Disclosure [Abstract]	'
2014 (remaining 3 months)	$1,370
2015	1,735
2016	1,544
2017	1,085
2018	889
Thereafter	1,694
Total minimum lease payments	$8,317

Commitments_and_Contingencies_2

Commitments and Contingencies - Additional Infromation (Details) (USD $)	3 Months Ended		9 Months Ended				0 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Feb. 28, 2014	Jul. 02, 2013	Feb. 28, 2014	Jul. 02, 2013
							Standby Letters of Credit	Standby Letters of Credit
Long Term Purchase Commitment [Line Items]	'	'	'	'	'	'	'	'
Rent expense	$644	$275	$1,700	$756	'	'	'	'
Irrevocable letters of credit amount	'	'	'	'	$408	$334	'	'
Letter of credit agreement period	'	'	'	'	'	'	'1 year	'1 year
Line of credit facility expiration date	'	'	'	'	'	'	28-Feb-15	2-Jul-15

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Details) (USD $)

3 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

In Millions, except Share data, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Jul. 31, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Common Stock Including Additional Paid in Capital

2007 Equity Compensation Plan

2014 Plan

2014 ESPP

Employee Stock Option

Employee Stock Option

Restricted Stock Units (RSUs)

Restricted Stock Units (RSUs)

Maximum

Maximum

2007 Equity Incentive Plan

2014 Plan

2007 Equity Incentive Plan

2014 Plan

Employee Stock Option

Employee Stock Option

2007 Equity Incentive Plan

2014 Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options granted vesting period

'

'

'

'

'

'

'

'

'4 years

'4 years

'4 years

'4 years

'

'

Options granted exercisable vesting period

'

'

'

'

'

'

'

'

'

'

'

'

'10 years

'10 years

Percentage of options granted vesting period

'

'

'

'

'

'

'

'

25.00%

25.00%

25.00%

25.00%

'

'

Common stock, shares authorized

'

'

'

'

4,975,000

6,093,703

2,500,000

'

'

'

'

'

'

'

Percentage of increase on common stock authorized on each subsequent anniversary

'

'

5.00%

'

'

'

'

'

'

'

'

'

'

'

Common stock, shares authorized reserve, description and terms

'

'

'This reserve will automatically increase on January 1, 2015 and each subsequent anniversary through 2024, by an amount equal to the smaller of (a) five percent (5%) of the number of shares of common stock issued and outstanding on the immediately preceding December 31; and (b) an amount determined by the Company’s board of directors.

'

'

'

'

'

'

'

'

'

'

'

Weighted average grant date fair value of options granted

$0

$1.70

$4.51

$1.69

'

'

'

'

'

'

'

'

'

'

Aggregate intrinsic value of options exercised

$421

$2

$2.50

$33

'

'

'

'

'

'

'

'

'

'

Unrecognized compensation cost

$11.50

'

$11.50

'

'

'

'

'

'

'

'

'

'

'

Unrecognized compensation cost expected to be recognized period

'

'

'3 years 3 months 18 days

'

'

'

'

'

'

'

'

'

'

'

Common stock purchase price discounted rate for eligible employee

'

'

'

'

'

'

'

15.00%

'

'

'

'

'

'

Lower fair market value of common stock on the first tading day

'

'

'

'

'

'

'

85.00%

'

'

'

'

'

'

StockBased_Compensation_Summar

Stock-Based Compensation - Summary of Stock Option Plan (Details) (USD $)	9 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Outstanding number of shares	'	'
Outstanding number of shares, Beginning	4,290,057	'
Outstanding number of shares, Options granted	140,500	'
Outstanding number of shares, Options exercised	-324,357	'
Outstanding number of shares, Options canceled	-141,468	'
Outstanding number of shares, Ending	3,964,732	4,290,057
Outstanding number of shares, Options exercisable and vested	2,229,532	'
Outstanding number of shares, Options vested and expected to vest	3,750,090	'
Weighted-average exercise price per share	'	'
Weighted average exercise price per shares, Beginning	$1.28	'
Weighted average exercise price per shares, Options granted	$7.38	'
Weighted average exercise price per shares, Options exercised	$0.85	'
Weighted average exercise price per shares, Options canceled	$2.44	'
Weighted average exercise price per shares, Ending	$1.49	$1.28
Weighted average exercise price per shares, Options exercisable and vested	$0.81	'
Weighted average exercise price per shares, Options vested and expected to vest	$1.42	'
Weighted average remaining contractual life	'	'
Weighted average remaining contractual life, Beginning	'7 years 4 months 13 days	'8 years
Weighted average remaining contractual life, Ending	'7 years 4 months 13 days	'8 years
Weighted average remaining contractual life, Options exercisable and vested	'6 years 5 months 16 days	'
Weighted average remaining contractual life, Options vested and expected to vest	'7 years 3 months 15 days	'
Aggregate intrinsic value	'	'
Aggregate intrinsic value, Beginning	$24,973	'
Aggregate intrinsic value, Ending	41,596	24,973
Aggregate intrinsic value, Options exercisable and vested	24,897	'
Aggregate intrinsic value, Options vested and excepted to vest	$39,605	'

StockBased_Compensation_Schedu

Stock-Based Compensation - Schedule of Assumptions Used to Calculate Fair Value of Options (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Employees	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Risk-free interest rate	'	1.60%	'	'
Risk-free interest rate, Minimum	'	'	1.80%	1.20%
Risk-free interest rate, Maximum	'	'	2.00%	1.60%
Dividend yield	'	0.00%	0.00%	0.00%
Volatility	'	68.00%	'	'
Volatility, Minimum	'	'	66.00%	68.00%
Volatility, Maximum	'	'	67.00%	69.00%
Expected term	'	'6 years 1 month 6 days	'	'
Employees | Minimum	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Expected term	'	'	'6 years	'5 years 2 months 12 days
Employees | Maximum	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Expected term	'	'	'6 years 4 months 24 days	'6 years 1 month 6 days
Non-Employees	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Risk-free interest rate, Minimum	2.00%	0.80%	2.00%	0.80%
Risk-free interest rate, Maximum	2.40%	2.50%	2.40%	2.50%
Dividend yield	0.00%	0.00%	0.00%	0.00%
Volatility, Minimum	63.00%	64.00%	63.00%	64.00%
Volatility, Maximum	65.00%	72.00%	65.00%	72.00%
Non-Employees | Minimum	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Expected term	'6 years	'5 years	'6 years	'5 years
Non-Employees | Maximum	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Expected term	'8 years 8 months 12 days	'9 years 3 months 18 days	'8 years 8 months 12 days	'9 years 3 months 18 days

StockBased_Compensation_Summar1

Stock-Based Compensation - Summary of Plans RSUs Activity (Details) (Restricted Stock Units (RSUs), USD $)	9 Months Ended
	Sep. 30, 2014
Restricted Stock Units (RSUs)	'
Outstanding number of shares	'
Outstanding number of shares, Beginning	0
Outstanding number of shares, RSUs granted	796,540
Outstanding number of shares, RSUs canceled	-48,779
Outstanding number of shares, Ending	747,761
Weighted-average Grant Date Fair Value	'
Weighted-Average Grant Date Fair Value, Beginning	$0
Weighted-Average Grant Date Fair Value, granted	$11
Weighted-Average Grant Date Fair Value, canceled	$10
Weighted-Average Grant Date Fair Value, Ending	$11
Weighted average remaining contractual life	'
Weighted average remaining contractual life, granted	'1 year 9 months 18 days
Weighted average remaining contractual life, ending	'1 year 9 months 18 days

StockBased_Compensation_Summar2

Stock-Based Compensation - Summary of Effects of Stock-Based Compensation (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
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	$788	$213	$1,836	$444
Research and development	'	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	283	46	594	96
Sales and marketing	'	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	244	88	577	151
General and administrative	'	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	$261	$79	$665	$197

Net_Loss_per_Share_Schedule_of

Net Loss per Share - Schedule of Computation of Net Loss per Common Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Net loss	($1,717)	($3,012)	($400)	($7,522)
Weighted-average shares used in computing basic and diluted net loss per share	29,058,656	6,618,719	14,345,685	6,605,833
Basic and diluted net loss per share	($0.06)	($0.46)	($0.03)	($1.14)

Net_Loss_per_Share_Schedule_of1

Net Loss per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive securities that were excluded from calculation of diluted net loss per share	4,836,310	17,300,280	4,836,310	19,307,941
Convertible preferred stock	'	'	'	'
Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive securities that were excluded from calculation of diluted net loss per share	'	15,510,314	'	15,510,314
Convertible preferred stock warrants	'	'	'	'
Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive securities that were excluded from calculation of diluted net loss per share	'	102,161	'	102,161
Employee Stock Option	'	'	'	'
Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive securities that were excluded from calculation of diluted net loss per share	3,964,732	1,687,805	3,964,732	3,695,466
Restricted Stock Units (RSUs)	'	'	'	'
Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive securities that were excluded from calculation of diluted net loss per share	747,761	'	747,761	'
Employee stock purchase plan (ESPP)	'	'	'	'
Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive securities that were excluded from calculation of diluted net loss per share	123,817	'	123,817	'

Employee_Befefit_Plans_Additio

Employee Befefit Plans - Additional Information (Details)	9 Months Ended
	Sep. 30, 2014
Postemployment Benefits [Abstract]	'
Description of Profit Sharing Plan (the Plan)	'The Company started a 401(k) Profit Sharing Plan (the Plan), effective January 1, 2009 for employees who are 21 years of age or older.

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (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
Income Tax Disclosure [Abstract]	'	'	'	'
Foreign income taxes and state minimum taxes	$64	$34	$201	$68
Current federal tax benefit	'	'	0	'
Unrecognized tax benefits related to uncertain tax positions	$0	'	$0	'

Segment_Information_Additional

Segment Information - Additional Information (Details)	9 Months Ended
	Sep. 30, 2014
	Business
Segment Reporting [Abstract]	'
Number of operating business activity	1

Segment_Information_Schedule_o

Segment Information - Schedule of Total Revenue from Customers By Location (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
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Total revenue	$27,420	$12,953	$78,161	$35,174
United States	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Total revenue	19,737	8,963	53,170	23,898
Australia	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Total revenue	1,776	1,157	6,687	3,440
Canada	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Total revenue	2,525	1,110	7,646	3,193
All Other Countries	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Total revenue	$3,382	$1,723	$10,658	$4,643

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Details) (USD $)	Oct. 31, 2014
In Thousands, unless otherwise specified
Forecast	'
Subsequent Event [Line Items]	'
Ownership percentage	100.00%
Subsequent Event	'
Subsequent Event [Line Items]	'
Convertible notes and outstanding shares for an aggregate price	955