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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2017	May 08, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Trading Symbol	MCHX
Entity Registrant Name	MARCHEX INC
Entity Central Index Key	0001224133
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Class A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		5,056,136
Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		38,168,504

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 103,072	$ 103,950
Accounts receivable, net	16,740	18,922
Prepaid expenses and other current assets	1,853	1,531
Refundable taxes	87	98
Total current assets	121,752	124,501
Property and equipment, net	2,791	3,557
Other assets, net	213	214
Total assets	124,756	128,272
Current liabilities:
Accounts payable	5,951	6,811
Accrued expenses and other current liabilities	7,325	7,707
Deferred revenue	355	349
Total current liabilities	13,631	14,867
Other non-current liabilities		134
Total liabilities	13,631	15,001
Stockholders’ equity:
Additional paid-in capital	361,824	360,422
Accumulated deficit	(251,132)	(247,584)
Total stockholders’ equity	111,125	113,271
Total liabilities and stockholders’ equity	124,756	128,272
Class A
Stockholders’ equity:
Common stock	53	53
Class B
Stockholders’ equity:
Common stock	$ 380	$ 380

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue	$ 24,375	$ 35,985
Expenses:
Service costs	13,598	21,982
Sales and marketing	4,992	5,522
Product development	5,270	7,472
General and administrative	4,030	4,662
Disposition related costs		4
Total operating expenses	27,890	39,642
Loss from operations	(3,515)	(3,657)
Other income (expense):
Interest and line of credit income (expense)	21	(4)
Other, net	(4)	(3)
Total other income (expense)	17	(7)
Loss before provision for income taxes	(3,498)	(3,664)
Income tax expense	12	13
Net loss applicable to common stockholders	$ (3,510)	$ (3,677)
Basic and diluted net loss per Class A and Class B share applicable to common stockholders	$ (0.08)	$ (0.09)
Class A
Other income (expense):
Net loss applicable to common stockholders	$ (420)	$ (467)
Shares used to calculate basic net loss per share applicable to common stockholders:
Shares used to calculate basic net loss per share applicable to common stockholders	5,056	5,233
Shares used to calculate diluted net loss per share applicable to common stockholders:
Shares used to calculate diluted net loss per share applicable to common stockholders	5,056	5,233
Class B
Other income (expense):
Net loss applicable to common stockholders	$ (3,090)	$ (3,210)
Shares used to calculate basic net loss per share applicable to common stockholders:
Shares used to calculate basic net loss per share applicable to common stockholders	37,169	35,977
Shares used to calculate diluted net loss per share applicable to common stockholders:
Shares used to calculate diluted net loss per share applicable to common stockholders	42,225	41,210

Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Activities:
Net loss	$ (3,510,000)	$ (3,677,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization and depreciation	751,000	876,000
Allowance for doubtful accounts and advertiser credits	307,000	261,000
Stock-based compensation	1,357,000	1,966,000
Change in certain assets and liabilities:
Accounts receivable, net	1,875,000	(2,137,000)
Refundable taxes	11,000	10,000
Prepaid expenses, other current assets and other assets	(303,000)	(718,000)
Accounts payable	(856,000)	1,257,000
Accrued expenses and other current liabilities	(382,000)	387,000
Deferred revenue	6,000	(373,000)
Other non-current liabilities	(134,000)	(119,000)
Net cash used in operating activities	(878,000)	(2,267,000)
Investing Activities:
Cash paid for sale of Archeo assets		(224,000)
Purchases of property and equipment	(2,000)	(248,000)
Purchases of intangible assets	(4,000)	(3,000)
Net cash used in investing activities	(6,000)	(475,000)
Financing Activities:
Tax withholding related to restricted stock awards		(50,000)
Proceeds from exercises of stock options, issuance and vesting of restricted stock and employee stock purchase plan, net	6,000	240,000
Net cash provided by financing activities	6,000	190,000
Net decrease in cash and cash equivalents	(878,000)	(2,552,000)
Cash and cash equivalents at beginning of period	103,950,000	109,155,000
Cash and cash equivalents at end of period	$ 103,072,000	$ 106,603,000

Description of Business and Basis of Presentation	3 Months Ended
Description of Business and Basis of Presentation	Mar. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Description of Business and Basis of Presentation	(1) Description of Business and Basis of Presentation Marchex, Inc. (the “Company”) was incorporated in the state of Delaware on January 17, 2003. The Company is a mobile advertising analytics company that helps connect online behavior to real-world, offline actions. The Company provides products and services for businesses of all sizes that depend on consumer phone calls to drive sales. The Company’s analytics technology can facilitate call quality, analyze calls and measure the outcomes of calls. The Company also delivers performance-based, pay-for-call advertising across numerous mobile and online publishers to connect consumers with businesses over the phone. The accompanying unaudited condensed consolidated financial statements of Marchex, Inc. and its wholly-owned subsidiaries have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information and notes required by generally accepted accounting principles for annual financial statements. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three months ended March 31, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017, or for any other period. The balance sheet at December 31, 2016 has been derived from the audited consolidated financial statements at that date, but does not include all of the information and notes required by accounting principles generally accepted in the United States of America for complete financial statements. These condensed consolidated financial statements and notes should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes included in the Annual Report on Form 10-K for the year ended December 31, 2016 filed with the SEC. The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All inter-company transactions and balances have been eliminated in consolidation.

Significant Accounting Policies	3 Months Ended
Significant Accounting Policies	Mar. 31, 2017
Accounting Policies [Abstract]
Significant Accounting Policies	(2) Significant Accounting Policies The preparation of financial statements in conformity with generally accepted accounting principles (“GAAP”) in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. These judgments are difficult as matters that are inherently uncertain directly impact their valuation and accounting. Actual results may vary from management’s estimates and assumptions. Recent Accounting Pronouncement(s) Not Yet Effective In May 2014, the FASB issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) (ASU 2014-09), which amends the existing accounting standards for revenue recognition. ASU 2014-09 requires an entity to recognize the amount of revenue to which it expects to be entitled when products or services are transferred to customers. In July 2015, the FASB voted to approve a one-year delay of the effective date. ASU 2014-09 is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Early adoption is permitted as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within those annual periods. In 2016, the FASB issued additional guidance to clarify the implementation guidance including ASU No. 2016-08, Revenue from Contracts with Customers - Principal versus Agent Considerations. This ASU clarifies the implementation guidance for principal versus agent considerations in ASU 2014-09 and provides indicators that assist in the assessment of control. ASU 2014-09 allows adoption using either (i) a full retrospective approach for all periods presented in the period of adoption, or (ii) a modified retrospective approach with the cumulative effect of initially applying the new standard recognized at the date of adoption and providing certain additional disclosures. The Company will adopt the new standard on January 1, 2018. The Company has initiated an assessment of its revenue streams and a project plan for implementing these standards. The Company’s evaluation of the impact of the new standard is ongoing and it has not yet completed its assessment of the effect that ASU 2014-09 and related standards will have on its consolidated financial statements and related disclosures. The Company currently plans to use the modified retrospective approach; however, a final decision regarding the adoption method has not been finalized at this time. In February 2016, the FASB issued Accounting Standards Update No. 2016-02 Leases (Topic 842) (ASU 2016-02), an ASU requiring the recognition of lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The ASU is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. The ASU must be adopted using a modified retrospective approach. The Company anticipates that adoption will affect its statement of financial position and will require changes to some of its processes. Most significant to the Company, the new guidance requires lessees to recognize operating building leases with a term of more than 12 months as lease assets and lease liabilities. The Company is currently in the process of evaluating the impact of adoption of ASU 2016-02 on its consolidated financial statements. In June 2016, the FASB issued Accounting Standards Update No. 2016-13, Financial Instruments — Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments (ASU 2016-13), an ASU amending the impairment model for most financial assets and certain other instruments. The ASU is effective for reporting periods beginning after December 15, 2019, with early adoption permitted after December 15, 2018. The ASU must be adopted using a modified-retrospective approach. The Company does not expect adoption of ASU 2016-13 to have a material impact on its consolidated financial statements. In August 2016, the FASB issued Accounting Standards Update No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (ASU 2016-15), an ASU which addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The ASU is effective for reporting periods beginning after December 15, 2017, with early adoption permitted. The ASU must be adopted using retrospective approach. The Company does not expect adoption of ASU 2016-15 to have a material impact on its consolidated financial statements. In October 2016, the FASB issued Accounting Standards Update No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets other than Inventory (ASU 2016-16), an ASU requiring the recognition of income tax effects of intercompany sales and transfers of assets other than inventory in the period in which the transfer occurs. The ASU is effective for reporting periods beginning after December 15, 2017, with early adoption permitted. The ASU must be adopted using a modified retrospective approach. The Company does not expect adoption of ASU 2016-16 to have a material impact on its consolidated financial statements. In November 2016, the FASB issued Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (a Consensus of the FASB Emerging Issues Task Force) (ASU 2016-18), an ASU requiring entities to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. As a result, entities will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. The ASU is effective for reporting periods beginning after December 15, 2017, with early adoption permitted. The ASU must be adopted using retrospective approach. The Company does not expect adoption of ASU 2016-18 to have a material impact on its consolidated financial statements. In January 2017, the FASB issued Accounting Standards Update No. 2017-01, Business Combinations (Topic 805), Clarifying the Definition of a Business (ASU 2017-01), an ASU changing the definition of a business to assist with evaluating whether a set of transferred assets and activities is a business. The ASU is effective for reporting periods beginning after December 15, 2017, and interim periods within those years, with early adoption permitted. The ASU must be adopted using a prospective approach on or after the effective date. The Company does not expect adoption of ASU 2017-01 to have a material impact on its consolidated financial statements.

Stock-based Compensation Plans

3 Months Ended

Mar. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-based Compensation Plans

(3) Stock-based Compensation Plans

The Company grants stock-based awards, including stock options, restricted stock awards, and restricted stock units. The Company measures stock-based compensation cost at the grant date based on the fair value of the award and recognizes it as expense over the vesting or service period, as applicable, of the stock-based award using the straight-line method.

On January 1, 2017, the Company adopted Accounting Standards Update No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). This ASU impacts several aspects of accounting for share-based payment transactions, including certain income tax consequences, forfeitures, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Upon adoption, the Company elected to account for forfeitures as they occur and no longer use an estimated forfeiture rate in the calculation of stock-based compensation expense. The net cumulative effect of this election was recognized as a $37,000 increase to accumulated deficit on January 1, 2017. Also under ASU 2016-09, excess tax benefits generated when stock-based awards vest or are settled are no longer recognized in equity but are instead recognized as a reduction to the provision for income taxes. On January 1, 2017, the Company recorded unrecognized excess tax benefits of $3.7 million to accumulated deficit, with a corresponding increase to the valuation allowance on deferred tax assets. This resulted in no net impact to equity due to the Company’s full valuation allowance.

Stock-based compensation expense was included in the following operating expense categories as follows (in thousands):

	Three months ended March 31,
	2016		2017
Service costs	$	198	$	125
Sales and marketing		439		406
Product development		532		91
General and administrative		797		735
Total stock-based compensation	$	1,966	$	1,357

The Company uses the Black-Scholes option pricing model to estimate the per share fair value of stock option grants with time-based vesting. The Black-Scholes model relies on a number of key assumptions to calculate estimated fair values. For the three months ended March 31, 2016 and 2017, the expected life of each award granted was determined based on historical experience with similar awards, giving consideration to contractual terms, anticipated exercise patterns, vesting schedules and expirations. Expected volatility is based on historical volatility levels of the Company’s Class B common stock and the expected volatility of companies in similar industries that have similar vesting and contractual terms. The risk-free interest rate is based on the implied yield currently available on U.S. Treasury issues with terms approximately equal to the expected life of the option.

The following weighted average assumptions were used in determining the fair value of time-vested stock option grants for the periods presented:

	Three months ended March 31,
	2016			2017
Expected life (in years)	4			4
Risk-free interest rate		1.04	%		1.72	%
Expected volatility		58	%		57	%

Stock option activity during the three months ended March 31, 2017 is summarized as follows:

	Shares (in thousands)			Weighted average exercise price		Weighted average remaining contractual term (in years)
Balance at December 31, 2016		7,678		$	5.97		5.07
Options granted		5			2.84
Options forfeited		(326	)		4.42
Options expired		(1,367	)		6.06
Options exercised		—			—
Balance at March 31, 2017		5,990		$	6.03		5.26

Restricted stock awards and restricted stock units are generally measured at fair value on the date of grant based on the number of awards granted and the quoted price of the Company’s common stock. Restricted stock units entitle the holder to receive one share of the Company’s Class B common stock upon satisfaction of certain service conditions.

Restricted stock awards and restricted stock unit activity during the three months ended March 31, 2017 is summarized as follows:

	Shares/ Units (in thousands)			Weighted average grant date fair value
Unvested balance at December 31, 2016		2,757		$	3.90
Granted		—			—
Vested		(68	)		3.90
Forfeited		(204	)		4.35
Unvested balance at March 31, 2017		2,485		$	3.82

In the three months ended March 31, 2016, the Company repurchased approximately 11,000 shares from a certain executive for minimum withholding taxes on approximately 38,000 restricted stock award vests. The number of shares repurchased was based on the value on the vesting date of the restricted stock awards equivalent to the value of the executive’s minimum withholding taxes of $50,000, which was remitted in cash to the appropriate taxing authorities. The payments are reflected as a financing activity within the consolidated statement of cash flows when paid. The payments had the effect of share repurchases by the Company as they reduced the number of shares that would have otherwise been issued on the vesting date and were recorded as a reduction of additional paid-in capital.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References + Details

Net Income (Loss) Per Share

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Net Income (Loss) Per Share

(4) Net Income (Loss) Per Share

The Company computes net income (loss) per share of Class A and Class B common stock using the two class method. Under the provisions of the two class method, basic net income (loss) per share is computed by dividing net income (loss) applicable to common stockholders by the weighted average number of common shares outstanding during the year. Diluted net income (loss) per share is computed by dividing net income (loss) applicable to common stockholders by the weighted average number of common and dilutive common equivalent shares outstanding during the period. The computation of the diluted net income (loss) per share of Class B common stock assumes the conversion of Class A common stock to Class B common stock, while the diluted net income (loss) per share of Class A common stock does not assume the conversion of those shares.

In accordance with the two class method, the undistributed earnings (losses) for each year are allocated based on the contractual participation rights of the Class A and Class B common shares and the restricted shares as if the earnings for the year had been distributed. Considering the terms of the Company’s charter which provides that, if and when dividends are declared on our common stock in accordance with Delaware General Corporation Law, equivalent dividends shall be paid with respect to the shares of Class A common stock and Class B common stock and that both classes of common stock have identical dividend rights and would share equally in the Company’s net assets in the event of liquidation, the Company has allocated undistributed earnings (losses) on a proportionate basis.

Instruments granted in unvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents, whether paid or unpaid, are participating securities prior to vesting. As such, the Company’s restricted stock awards are considered participating securities for purposes of calculating earnings per share.

The following table calculates net loss applicable to common stockholders used to compute basic loss per share for the periods ended (in thousands, except per share amounts):

	Three months ended March 31,
	2016						2017
	Class A			Class B			Class A			Class B
Basic net loss per share:
Numerator:
Net loss applicable to common stockholders	$	(467	)	$	(3,210	)	$	(420	)	$	(3,090	)
Denominator:
Weighted average number of shares outstanding used to calculate basic net loss per share		5,233			35,977			5,056			37,169
Basic net loss per share applicable to common stockholders	$	(0.09	)	$	(0.09	)	$	(0.08	)	$	(0.08	)

The following table calculates net loss to net loss applicable to common stockholders used to compute diluted net loss per share for the periods ended (in thousands, except per share amounts):

	Three months ended March 31,
	2016						2017
	Class A			Class B			Class A			Class B
Diluted net loss per share:
Numerator:
Net loss	$	(467	)	$	(3,210	)	$	(420	)	$	(3,090	)
Reallocation of net loss for Class A shares as a result of conversion of Class A to Class B shares		—			(467	)		—			(420	)
Net loss applicable to common stockholders	$	(467	)	$	(3,677	)	$	(420	)	$	(3,510	)
Denominator:
Weighted average number of shares outstanding used to calculate basic net loss per share		5,233			35,977			5,056			37,169
Conversion of Class A to Class B common shares outstanding		—			5,233			—			5,056
Weighted average number of shares outstanding used to calculate diluted net loss per share		5,233			41,210			5,056			42,225
Diluted net loss per share applicable to common stockholders	$	(0.09	)	$	(0.09	)	$	(0.08	)	$	(0.08	)

The computation of diluted net loss per share excludes the following because their effect would be anti-dilutive (in thousands):

•

For the three months ended March 31, 2016 and 2017, outstanding options to acquire 8,641 and 5,990 shares, respectively of Class B common stock.

•

For the three months ended March 31, 2016 and 2017, 708 and 850 shares of unvested Class B restricted common shares, respectively.

•

For the three months ended March 31, 2016 and 2017 1,454 and 1,635 restricted stock units, respectively.

Concentrations

3 Months Ended

Mar. 31, 2017

Risks And Uncertainties [Abstract]

Concentrations

(5) Concentrations

The Company maintains substantially all of its cash and cash equivalents with one financial institution and are all considered at Level 1 fair value with observable inputs that reflect quoted prices for identical assets or liabilities in active markets. At various points during the three months ended March 31, 2016, the Company held cash equivalents in a commercial paper sweep account with the same financial institution. These Level 2 assets were fully liquidated prior to March 31, 2016.

A majority of the Company’s revenue earned from advertisers is generated through arrangements with distribution partners. The Company may not be successful in renewing any of these agreements, or, if they are renewed, they may not be on terms as favorable as current arrangements. The Company may not be successful in entering into agreements with new distribution partners or advertisers on commercially acceptable terms. In addition, several of these distribution partners or advertisers may be considered potential competitors. There were no distribution partners paid more than 10% of consolidated revenue for the three months ended March 31, 2016 and 2017.

The advertisers representing more than 10% of consolidated revenue are as follows (in percentages):

	Three months ended March 31,
	2016			2017
Advertiser A		24	%		22	%
Advertiser B		26	%		17	%
Advertiser C	*				10	%

*	Less than 10% of revenue.

Advertiser A is also a distribution partner.

The outstanding receivable balance for each advertiser representing more than 10% of accounts receivable is as follows (in percentages):

	At December 31, 2016			At March 31, 2017
Advertiser A		11	%		21	%
Advertiser B		30	%		25	%
Advertiser C		15	%		14	%

In certain cases, the Company may engage directly with one or more advertising agencies who act on an advertiser’s behalf. In addition, an advertising agency may represent more than one advertiser that utilizes the Company’s products and services. One advertising agency represented 22% and 11% of consolidated revenue for the three months ended March 31, 2016 and 2017, respectively. This same advertising agency represented 26% and 15% of consolidated accounts receivable as of December 31, 2016 and March 31, 2017, respectively. One other advertising agency represented less than 10% of consolidated accounts receivable as of December 31, 2016, and 13% of consolidated accounts receivable as of March 31, 2017.

Segment Reporting and Geographic Information

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Segment Reporting and Geographic Information

(6) Segment Reporting and Geographic Information

Operating segments are revenue-producing components of the enterprise for which separate financial information is produced internally for the Company’s management. For the periods presented, we primarily operated as a single segment. In 2016, we had other operating activities related to the transition activities of the Archeo operations which were not significant.

Revenues from advertisers by geographical areas are tracked on the basis of the location of the advertiser. The vast majority of the Company’s revenue and accounts receivable are derived from domestic sales to advertisers engaged in various mobile, online and other activities.

Revenues by geographic region are as follows (in percentages):

	Three months ended March 31,
	2016			2017
United States		97	%		96	%
Canada		3	%		4	%
Other countries	*			*
		100	%		100	%

*	Less than 1% of revenue.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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+ Details

Property and Equipment

3 Months Ended

Mar. 31, 2017

Property Plant And Equipment [Abstract]

Property and Equipment

(7) Property and Equipment

Property and equipment consisted of the following (in thousands):

	At December 31, 2016			At March 31, 2017
Computer and other related equipment	$	18,467		$	18,733
Purchased and internally developed software		6,811			6,811
Furniture and fixtures		1,493			1,493
Leasehold improvements		2,371			2,086
	$	29,142		$	29,123
Less: Accumulated depreciation and amortization		(25,585	)		(26,332	)
Property and equipment, net	$	3,557		$	2,791

Depreciation and amortization expense related to property and equipment was approximately $866,000 and $747,000 for the three months ended March 31, 2016 and 2017, respectively.

Commitments, Contingencies, Taxes and Other

3 Months Ended

Mar. 31, 2017

Commitments Contingencies Taxes And Other [Abstract]

Commitments, Contingencies, Taxes and Other

(8) Commitments, Contingencies, Taxes and Other

(a) Commitments

The Company has commitments for future payments related to office facilities leases and other contractual obligations. The Company leases its office facilities under operating lease agreements and recognizes rent expense on a straight-line basis over the lease term with any lease incentive amortized as a reduction of rent expense over the lease term. Other contractual obligations primarily relate to minimum contractual payments due to distribution partners and other outside service providers. Future minimum payments are approximately as follows (in thousands):

	Facilities operating leases		Other contractual obligations		Total
2017	$	1,773	$	2,691	$	4,464
2018		577		1,632		2,209
2019		—		615		615
2020		—		1		1
2021 and after		—		—		—
Total minimum payments	$	2,350	$	4,939	$	7,289

Rent expense incurred by the Company was approximately $492,000 and $488,000 for the three months ended March 31, 2016 and 2017, respectively.

(b) Contingencies

The Company from time to time is a party to disputes and legal and administrative proceedings arising from the ordinary course of business. In some agreements to which the Company is a party, the Company has agreed to indemnification provisions of varying scope and terms with advertisers, vendors and other parties with respect to certain matters, including, but not limited to, losses arising out of the Company’s breach of agreements or representations and warranties made by the Company, services to be provided by the Company and intellectual property infringement claims made by third parties. As a result of these provisions, the Company may from time to time provide certain levels of financial support to our contract parties to seek to minimize the impact of any associated litigation in which they may be involved. To date, there have been no known events or circumstances that have resulted in any material costs related to these indemnification provisions and no liabilities therefore have been recorded in the accompanying consolidated financial statements. However, the maximum potential amount of the future payments we could be required to make under these indemnification provisions could be material.

While any litigation contains an element of uncertainty, the Company is not aware of any legal proceedings or claims which are pending that the Company believes, based on current knowledge, will have, individually or taken together, a material adverse effect on the Company’s financial condition, results of operations or liquidity.

The Company determined that it is not more likely than not that its deferred tax assets will be realized and accordingly recorded 100% valuation allowance against these deferred tax assets as of December 31, 2016 and March 31, 2017. In assessing whether it is more likely than not that the Company’s deferred tax assets will be realized, factors considered included: historical taxable income, historical trends related to advertiser usage rates, projected revenues and expenses, macroeconomic conditions, issues facing the industry, existing contracts, the Company’s ability to project future results and any appreciation of its other assets. The ultimate realization of deferred tax assets depends on the generation of future taxable income during the periods in which those temporary differences are deductible. The Company considered the future reversal of deferred tax liabilities, carryback potential, projected taxable income, and tax planning strategies as well as its history of taxable income or losses in the relevant jurisdictions in making this assessment. Based on the level of historical taxable losses and the uncertainty of projections for future taxable income over the periods for which the deferred tax assets are deductible, the Company concluded that it is not more likely than not that the gross deferred tax assets will be realized.

The Company adopted ASU 2015-17 on January 1, 2017, which requires all deferred tax assets and liabilities, and any related valuation allowance, to be classified as non-current on the balance sheet. The adoption of this standard did not have any impact on the Company’s financial statements due to the full valuation allowance recorded on our deferred taxes.

From time to time, various state, federal and other jurisdictional tax authorities undertake audits of the Company and its filings. In evaluating the exposure associated with various tax filing positions, the Company on occasion accrues charges for uncertain positions. Resolution of uncertain tax positions will impact our effective tax rate when settled. The Company does not have any significant interest or penalty accruals. The provision for income taxes includes the impact of contingency provisions and changes to contingencies that are considered appropriate. The Company files U.S. federal, certain U.S. states, and certain foreign tax returns. Generally, U.S. federal, U.S. state, and foreign tax returns filed for years after 2012 are within the statute of limitations and are under examination or may be subject to examination.

(d) Other

In the third quarter of 2016, the Company incurred approximately $1.6 million in employee separation and facility termination related costs. At December 31, 2016, $354,000 was accrued, of which $18,000 was paid in the first quarter of 2017, with the remaining amount to be paid in 2017.

In the first quarter of 2017, the Company incurred approximately $700,000 of employee separation related costs as part of savings measures implemented in 2017, of which $35,000 was accrued as of March 31, 2017 and will be paid in 2017.

Common Stock	3 Months Ended
Common Stock	Mar. 31, 2017
Equity [Abstract]
Common Stock	(9) Common Stock In November 2014, the Company’s board of directors authorized a share repurchase program (the “2014 Repurchase Program”), which supersedes and replaces any prior repurchase programs. Under the 2014 Repurchase Program, the Company is authorized to repurchase up to 3 million shares of the Company’s Class B common stock in the aggregate through open market and privately negotiated transactions, at such times and in such amounts as the Company deems appropriate. Repurchases may also be made under a Rule 10b5-1 plan, which would permit shares to be repurchased when the Company might otherwise be precluded from doing so under insider trading laws. The timing and actual number of shares repurchased will depend on a variety of factors including price, corporate and regulatory requirements, capital availability, and other market conditions. The 2014 Repurchase Program does not have an expiration date and may be expanded, limited or terminated at any time without prior notice. The Company did not repurchase any Class B common stock for the three months ended March 31, 2016 and 2017. During the three months ended March 31, 2016, the Company’s board of directors approved and the Company retired approximately 125,237 shares of treasury stock.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

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-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Topic 235
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6521494

Reference 15: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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+ Details

Significant Accounting Policies (Policies)	3 Months Ended
Significant Accounting Policies (Policies)	Mar. 31, 2017
Accounting Policies [Abstract]
Accompanying Unaudited Condensed Consolidated Financial Statements	The accompanying unaudited condensed consolidated financial statements of Marchex, Inc. and its wholly-owned subsidiaries have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information and notes required by generally accepted accounting principles for annual financial statements. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three months ended March 31, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017, or for any other period. The balance sheet at December 31, 2016 has been derived from the audited consolidated financial statements at that date, but does not include all of the information and notes required by accounting principles generally accepted in the United States of America for complete financial statements. These condensed consolidated financial statements and notes should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes included in the Annual Report on Form 10-K for the year ended December 31, 2016 filed with the SEC. The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All inter-company transactions and balances have been eliminated in consolidation.
Recent Accounting Pronouncement(s) Not Yet Effective	Recent Accounting Pronouncement(s) Not Yet Effective In May 2014, the FASB issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) (ASU 2014-09), which amends the existing accounting standards for revenue recognition. ASU 2014-09 requires an entity to recognize the amount of revenue to which it expects to be entitled when products or services are transferred to customers. In July 2015, the FASB voted to approve a one-year delay of the effective date. ASU 2014-09 is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Early adoption is permitted as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within those annual periods. In 2016, the FASB issued additional guidance to clarify the implementation guidance including ASU No. 2016-08, Revenue from Contracts with Customers - Principal versus Agent Considerations. This ASU clarifies the implementation guidance for principal versus agent considerations in ASU 2014-09 and provides indicators that assist in the assessment of control. ASU 2014-09 allows adoption using either (i) a full retrospective approach for all periods presented in the period of adoption, or (ii) a modified retrospective approach with the cumulative effect of initially applying the new standard recognized at the date of adoption and providing certain additional disclosures. The Company will adopt the new standard on January 1, 2018. The Company has initiated an assessment of its revenue streams and a project plan for implementing these standards. The Company’s evaluation of the impact of the new standard is ongoing and it has not yet completed its assessment of the effect that ASU 2014-09 and related standards will have on its consolidated financial statements and related disclosures. The Company currently plans to use the modified retrospective approach; however, a final decision regarding the adoption method has not been finalized at this time. In February 2016, the FASB issued Accounting Standards Update No. 2016-02 Leases (Topic 842) (ASU 2016-02), an ASU requiring the recognition of lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The ASU is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. The ASU must be adopted using a modified retrospective approach. The Company anticipates that adoption will affect its statement of financial position and will require changes to some of its processes. Most significant to the Company, the new guidance requires lessees to recognize operating building leases with a term of more than 12 months as lease assets and lease liabilities. The Company is currently in the process of evaluating the impact of adoption of ASU 2016-02 on its consolidated financial statements. In June 2016, the FASB issued Accounting Standards Update No. 2016-13, Financial Instruments — Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments (ASU 2016-13), an ASU amending the impairment model for most financial assets and certain other instruments. The ASU is effective for reporting periods beginning after December 15, 2019, with early adoption permitted after December 15, 2018. The ASU must be adopted using a modified-retrospective approach. The Company does not expect adoption of ASU 2016-13 to have a material impact on its consolidated financial statements. In August 2016, the FASB issued Accounting Standards Update No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (ASU 2016-15), an ASU which addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The ASU is effective for reporting periods beginning after December 15, 2017, with early adoption permitted. The ASU must be adopted using retrospective approach. The Company does not expect adoption of ASU 2016-15 to have a material impact on its consolidated financial statements. In October 2016, the FASB issued Accounting Standards Update No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets other than Inventory (ASU 2016-16), an ASU requiring the recognition of income tax effects of intercompany sales and transfers of assets other than inventory in the period in which the transfer occurs. The ASU is effective for reporting periods beginning after December 15, 2017, with early adoption permitted. The ASU must be adopted using a modified retrospective approach. The Company does not expect adoption of ASU 2016-16 to have a material impact on its consolidated financial statements. In November 2016, the FASB issued Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (a Consensus of the FASB Emerging Issues Task Force) (ASU 2016-18), an ASU requiring entities to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. As a result, entities will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. The ASU is effective for reporting periods beginning after December 15, 2017, with early adoption permitted. The ASU must be adopted using retrospective approach. The Company does not expect adoption of ASU 2016-18 to have a material impact on its consolidated financial statements. In January 2017, the FASB issued Accounting Standards Update No. 2017-01, Business Combinations (Topic 805), Clarifying the Definition of a Business (ASU 2017-01), an ASU changing the definition of a business to assist with evaluating whether a set of transferred assets and activities is a business. The ASU is effective for reporting periods beginning after December 15, 2017, and interim periods within those years, with early adoption permitted. The ASU must be adopted using a prospective approach on or after the effective date. The Company does not expect adoption of ASU 2017-01 to have a material impact on its consolidated financial statements.
Stock-Based Compensation	The Company grants stock-based awards, including stock options, restricted stock awards, and restricted stock units. The Company measures stock-based compensation cost at the grant date based on the fair value of the award and recognizes it as expense over the vesting or service period, as applicable, of the stock-based award using the straight-line method. On January 1, 2017, the Company adopted Accounting Standards Update No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). This ASU impacts several aspects of accounting for share-based payment transactions, including certain income tax consequences, forfeitures, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Upon adoption, the Company elected to account for forfeitures as they occur and no longer use an estimated forfeiture rate in the calculation of stock-based compensation expense. The net cumulative effect of this election was recognized as a $37,000 increase to accumulated deficit on January 1, 2017. Also under ASU 2016-09, excess tax benefits generated when stock-based awards vest or are settled are no longer recognized in equity but are instead recognized as a reduction to the provision for income taxes. On January 1, 2017, the Company recorded unrecognized excess tax benefits of $3.7 million to accumulated deficit, with a corresponding increase to the valuation allowance on deferred tax assets. This resulted in no net impact to equity due to the Company’s full valuation allowance. The Company uses the Black-Scholes option pricing model to estimate the per share fair value of stock option grants with time-based vesting. The Black-Scholes model relies on a number of key assumptions to calculate estimated fair values. For the three months ended March 31, 2016 and 2017, the expected life of each award granted was determined based on historical experience with similar awards, giving consideration to contractual terms, anticipated exercise patterns, vesting schedules and expirations. Expected volatility is based on historical volatility levels of the Company’s Class B common stock and the expected volatility of companies in similar industries that have similar vesting and contractual terms. The risk-free interest rate is based on the implied yield currently available on U.S. Treasury issues with terms approximately equal to the expected life of the option.

Stock-based Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-based Compensation Expense Included in Operating Expense

Stock-based compensation expense was included in the following operating expense categories as follows (in thousands):

	Three months ended March 31,
	2016		2017
Service costs	$	198	$	125
Sales and marketing		439		406
Product development		532		91
General and administrative		797		735
Total stock-based compensation	$	1,966	$	1,357

Assumptions to Estimate Fair Value for Stock Options at Grant Date

The following weighted average assumptions were used in determining the fair value of time-vested stock option grants for the periods presented:

	Three months ended March 31,
	2016			2017
Expected life (in years)	4			4
Risk-free interest rate		1.04	%		1.72	%
Expected volatility		58	%		57	%

Summary of Stock Option Activity

Stock option activity during the three months ended March 31, 2017 is summarized as follows:

	Shares (in thousands)			Weighted average exercise price		Weighted average remaining contractual term (in years)
Balance at December 31, 2016		7,678		$	5.97		5.07
Options granted		5			2.84
Options forfeited		(326	)		4.42
Options expired		(1,367	)		6.06
Options exercised		—			—
Balance at March 31, 2017		5,990		$	6.03		5.26

Summary of Restricted Stock Awards and Restricted Stock Units

Restricted stock awards and restricted stock unit activity during the three months ended March 31, 2017 is summarized as follows:

	Shares/ Units (in thousands)			Weighted average grant date fair value
Unvested balance at December 31, 2016		2,757		$	3.90
Granted		—			—
Vested		(68	)		3.90
Forfeited		(204	)		4.35
Unvested balance at March 31, 2017		2,485		$	3.82

Net Income (Loss) Per Share (Tables)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Computation of Loss per Share Basic and Diluted

The following table calculates net loss applicable to common stockholders used to compute basic loss per share for the periods ended (in thousands, except per share amounts):

	Three months ended March 31,
	2016						2017
	Class A			Class B			Class A			Class B
Basic net loss per share:
Numerator:
Net loss applicable to common stockholders	$	(467	)	$	(3,210	)	$	(420	)	$	(3,090	)
Denominator:
Weighted average number of shares outstanding used to calculate basic net loss per share		5,233			35,977			5,056			37,169
Basic net loss per share applicable to common stockholders	$	(0.09	)	$	(0.09	)	$	(0.08	)	$	(0.08	)

The following table calculates net loss to net loss applicable to common stockholders used to compute diluted net loss per share for the periods ended (in thousands, except per share amounts):

	Three months ended March 31,
	2016						2017
	Class A			Class B			Class A			Class B
Diluted net loss per share:
Numerator:
Net loss	$	(467	)	$	(3,210	)	$	(420	)	$	(3,090	)
Reallocation of net loss for Class A shares as a result of conversion of Class A to Class B shares		—			(467	)		—			(420	)
Net loss applicable to common stockholders	$	(467	)	$	(3,677	)	$	(420	)	$	(3,510	)
Denominator:
Weighted average number of shares outstanding used to calculate basic net loss per share		5,233			35,977			5,056			37,169
Conversion of Class A to Class B common shares outstanding		—			5,233			—			5,056
Weighted average number of shares outstanding used to calculate diluted net loss per share		5,233			41,210			5,056			42,225
Diluted net loss per share applicable to common stockholders	$	(0.09	)	$	(0.09	)	$	(0.08	)	$	(0.08	)

Concentrations (Tables)

3 Months Ended

Mar. 31, 2017

Consolidated Revenue

Schedules of Concentration of Risk, by Risk Factor

The advertisers representing more than 10% of consolidated revenue are as follows (in percentages):

	Three months ended March 31,
	2016			2017
Advertiser A		24	%		22	%
Advertiser B		26	%		17	%
Advertiser C	*				10	%

*	Less than 10% of revenue.

Consolidated Accounts Receivable

Schedules of Concentration of Risk, by Risk Factor

The outstanding receivable balance for each advertiser representing more than 10% of accounts receivable is as follows (in percentages):

	At December 31, 2016			At March 31, 2017
Advertiser A		11	%		21	%
Advertiser B		30	%		25	%
Advertiser C		15	%		14	%

Segment Reporting and Geographic Information (Tables)

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Revenues by Geographic Region

Revenues by geographic region are as follows (in percentages):

	Three months ended March 31,
	2016			2017
United States		97	%		96	%
Canada		3	%		4	%
Other countries	*			*
		100	%		100	%

*	Less than 1% of revenue.

Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2017

Property Plant And Equipment [Abstract]

Property and Equipment

Property and equipment consisted of the following (in thousands):

	At December 31, 2016			At March 31, 2017
Computer and other related equipment	$	18,467		$	18,733
Purchased and internally developed software		6,811			6,811
Furniture and fixtures		1,493			1,493
Leasehold improvements		2,371			2,086
	$	29,142		$	29,123
Less: Accumulated depreciation and amortization		(25,585	)		(26,332	)
Property and equipment, net	$	3,557		$	2,791

Commitments, Contingencies, Taxes and Other (Tables)

3 Months Ended

Mar. 31, 2017

Commitments Contingencies Taxes And Other [Abstract]

Future Minimum Payments

Future minimum payments are approximately as follows (in thousands):

	Facilities operating leases		Other contractual obligations		Total
2017	$	1,773	$	2,691	$	4,464
2018		577		1,632		2,209
2019		—		615		615
2020		—		1		1
2021 and after		—		—		—
Total minimum payments	$	2,350	$	4,939	$	7,289

Stock-based Compensation Plans - Additional Information (Detail) - USD ($)		3 Months Ended
	Jan. 02, 2017	Mar. 31, 2017	Mar. 31, 2016	Jan. 01, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of stock for tax withholding			11,000
Vested, Shares			38,000
Minimum withholding tax, remitted in cash			$ 50,000
Class B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units holder entitle to receive number of shares of common stock upon certain service conditions		1
Improvements to Employee Share-Based Payment Accounting (ASU 2016-09)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase to accumulated deficit	$ 37,000
Unrecognized excess tax benefits				$ 3,700,000

Stock-based Compensation Expense by Operating Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	$ 1,357	$ 1,966
Service Costs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	125	198
Sales and Marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	406	439
Product Development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	91	532
General and Administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	$ 735	$ 797

Assumptions to Estimate Fair Value for Stock Options at Grant Date (Detail) - Time Vested Stock Options	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	4 years	4 years
Risk-free interest rate	1.72%	1.04%
Expected volatility	57.00%	58.00%

Summary of Stock Option and Restricted Stock Activity (Detail) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of shares, Beginning Balance	7,678
Options granted, Shares	5
Options forfeited, Shares	(326)
Options expired, Shares	(1,367)
Number of shares, Ending Balance	5,990	7,678
Weighted average exercise price, Beginning Balance	$ 5.97
Options granted, Weighted average exercise price	2.84
Options forfeited, Weighted average exercise price	4.42
Options expired, Weighted average exercise price	6.06
Weighted average exercise price, Ending Balance	$ 6.03	$ 5.97
Weighted average remaining contractual term, End of the period	5 years 3 months 4 days	5 years 26 days

Summary Restricted Stock Awards and Restricted Stock Units Activity (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested, Shares		(38,000)
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested Shares, Beginning Balance	2,757
Vested, Shares	(68)
Forfeited, Shares	(204)
Unvested Shares, Ending Balance	2,485
Weighted average grant date fair value, Beginning Balance	$ 3.90
Vested, Weighted average grant date fair value	3.90
Forfeited, Weighted average grant date fair value	4.35
Weighted average grant date fair value, Ending Balance	$ 3.82

Computation of Loss Per Share Basic and Diluted (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Numerator:
Net loss applicable to common stockholders	$ (3,510)	$ (3,677)
Numerator:
Net loss	(3,510)	(3,677)
Class A
Numerator:
Net loss applicable to common stockholders	$ (420)	$ (467)
Denominator:
Weighted average number of shares outstanding used to calculate basic net loss per share	5,056	5,233
Weighted average number of shares outstanding used to calculate diluted net loss per share	5,056	5,233
Basic net loss per share applicable to common stockholders	$ (0.08)	$ (0.09)
Numerator:
Net loss	$ (420)	$ (467)
Net loss applicable to common stockholders	$ (420)	$ (467)
Diluted net loss per share applicable to common stockholders	$ (0.08)	$ (0.09)
Class B
Numerator:
Net loss applicable to common stockholders	$ (3,090)	$ (3,210)
Denominator:
Weighted average number of shares outstanding used to calculate basic net loss per share	37,169	35,977
Conversion of Class A to Class B common shares outstanding	5,056	5,233
Weighted average number of shares outstanding used to calculate diluted net loss per share	42,225	41,210
Basic net loss per share applicable to common stockholders	$ (0.08)	$ (0.09)
Numerator:
Net loss	$ (3,090)	$ (3,210)
Reallocation of net loss for Class A shares as a result of conversion of Class A to Class B shares	(420)	(467)
Net loss applicable to common stockholders	$ (3,510)	$ (3,677)
Diluted net loss per share applicable to common stockholders	$ (0.08)	$ (0.09)

Net Income (Loss) Per Share - Additional Information (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Equity Option \| Class B
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares	5,990	8,641
Restricted Stock \| Class B
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares	850	708
Restricted Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares	1,635	1,454

Concentrations - Additional Information (Detail)	3 Months Ended		12 Months Ended
Concentrations - Additional Information (Detail)	Mar. 31, 2017 Entity Distributor Agency	Mar. 31, 2016 Distributor Agency	Dec. 31, 2016 Agency
Concentration Risk [Line Items]
Number of financial institution \| Entity	1
Number of distribution partners that were paid consolidated revenue \| Distributor	0	0
Consolidated Revenue \| Customer Concentration Risk
Concentration Risk [Line Items]
Number of advertising agencies	1	1
Concentration risk, percentage	11.00%	22.00%
Consolidated Accounts Receivable \| Customer Concentration Risk
Concentration Risk [Line Items]
Number of advertising agencies			1
Concentration risk, percentage	15.00%		26.00%
Consolidated Accounts Receivable \| Customer Concentration Risk \| Other Advertising Agency
Concentration Risk [Line Items]
Concentration risk, percentage	13.00%
Minimum
Concentration Risk [Line Items]
Percentage of revenue as criteria for major distribution partners	10.00%	10.00%

Schedules of Concentration of Risk Based on Consolidated Revenue (Detail) - Customer Concentration Risk - Consolidated Revenue	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Concentration Risk [Line Items]
Concentration risk, percentage	11.00%	22.00%
Advertiser A
Concentration Risk [Line Items]
Concentration risk, percentage	22.00%	24.00%
Advertiser B
Concentration Risk [Line Items]
Concentration risk, percentage	17.00%	26.00%
Advertiser C
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%

Schedules of Concentration of Risk Based on Accounts Receivable (Detail) - Customer Concentration Risk - Consolidated Accounts Receivable	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Concentration Risk [Line Items]
Concentration risk, percentage	15.00%	26.00%
Advertiser A
Concentration Risk [Line Items]
Concentration risk, percentage	21.00%	11.00%
Advertiser B
Concentration Risk [Line Items]
Concentration risk, percentage	25.00%	30.00%
Advertiser C
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	15.00%

Segment Reporting and Geographic Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017 Segment
Segment Reporting [Abstract]
Number of operating segments	1

Revenues by Geographic Region (Detail) - Geographic Concentration Risk - Consolidated Revenue

3 Months Ended

Mar. 31, 2017

Mar. 31, 2016

Segment Reporting Information

Revenues by geographic region

100.00%

United States

Segment Reporting Information

Revenues by geographic region

96.00%

97.00%

Canada

Segment Reporting Information

Revenues by geographic region

4.00%

3.00%

Other Countries

Segment Reporting Information

Revenues by geographic region

^[1]

0.00%

[1]	Less than 1% of revenue.

Property and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 29,123	$ 29,142
Less: Accumulated depreciation and amortization	(26,332)	(25,585)
Property and equipment, net	2,791	3,557
Computer and Other Related Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	18,733	18,467
Purchased and Internally Developed Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,811	6,811
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,493	1,493
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,086	$ 2,371

Property and Equipment - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Property Plant And Equipment [Abstract]
Depreciation and amortization expense	$ 747,000	$ 866,000

Future Minimum Payments (Detail) $ in Thousands	Mar. 31, 2017 USD ($)
Contractual Obligation Fiscal Year Maturity Schedule [Abstract]
Facilities operating leases 2017	$ 1,773
Facilities operating leases 2018	577
Facilities operating leases 2019	0
Facilities operating leases 2020	0
Facilities operating leases 2021 and after	0
Facilities operating leases Total minimum payments	2,350
Other contractual obligations 2017	2,691
Other contractual obligations 2018	1,632
Other contractual obligations 2019	615
Other contractual obligations 2020	1
Other contractual obligations 2021 and after	0
Other contractual obligations, Total minimum payments	4,939
Total 2017	4,464
Total 2018	2,209
Total 2019	615
Total 2020	1
Total 2021 and after	0
Total minimum payments	$ 7,289

Commitments, Contingencies, Taxes and Other - Additional Information (Detail) - USD ($)	3 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Mar. 31, 2016	Dec. 31, 2016
Commitments Contingencies Taxes And Other [Line Items]
Rent expense		$ 488,000		$ 492,000
Percentage of valuation allowance		100.00%			100.00%
Employee separation and facility termination related costs incurred		$ 700,000	$ 1,600,000
Employee separation and facility termination related costs accrued and unpaid		35,000			$ 354,000
Employee separation and facility termination related costs paid		$ 18,000
Scenario, Forecast
Commitments Contingencies Taxes And Other [Line Items]
Employee separation and facility termination related costs paid	$ 35,000

Common Stock - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Nov. 30, 2014
Equity, Class of Treasury Stock [Line Items]
Treasury stock, shares retired		125,237
Class B
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized to be repurchased			3,000,000
Treasury stock acquired, shares	0	0
Treasury stock acquired, value	$ 0	$ 0