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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of Components of Loss before Income Taxes

The following table presents components of loss before income taxes for the periods presented (in thousands):

		Year Ended December 31,
		2017				2016				2015
United States		$	(9,434	)		$	(12,222	)		$	(26,305	)
International		733				416				528
Loss before income taxes		$	(8,701	)		$	(11,806	)		$	(25,777	)

Schedule of Components of Provision for Income Taxes

Provision for income taxes for the periods presented consisted of (in thousands):

		Year Ended December 31,
		2017				2016				2015
Current:
U.S. federal		$	—			$	—			$	—
U.S. state		42				16				21
Foreign		226				38				40
Total provision for income taxes		$	268			$	54			$	61

Schedule of Effective Income Tax Amount Reconciliation

Income tax expense differed from the amounts computed by applying the U.S. federal income tax rate of 34% to pre-tax loss for the periods presented as a result of the following (in thousands):

		Year Ended December 31,
		2017				2016				2015
U.S. federal tax at statutory rate		$	(2,958	)		$	(4,014	)		$	(8,764	)
U.S. state income taxes		(708		)		490				(756		)
Non-deductible expense (benefit)		(5,673		)		931				438
Research and development credit		(402		)		(262		)		(440		)
Stock-based compensation		(14,622		)		983				737
Impact of 2017 Tax Act		25,952				—				—
Other		2				(104		)		481
Change in valuation allowance		(1,323		)		2,030				8,365
Total provision for income taxes		$	268			$	54			$	61

Schedule of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to significant portions of the Company’s deferred tax assets and liabilities as of December 31, 2017 and 2016 related to the following (in thousands):    

		December 31,
		2017				2016
Deferred tax assets:
Net operating loss and credit carryforwards		$	47,991			$	48,533
Accrued liabilities		3,183				3,801
Allowance for doubtful accounts		416				429
Property and equipment		(98		)		183
Deferred revenue		140				23
Accrued compensation		900				1,183
Intangibles		7				14
Gross deferred tax assets		52,539				54,166
Valuation allowance		(52,275		)		(53,598		)
Net deferred tax assets		264				568
Deferred tax liabilities:
Amortized intangibles		(264		)		(568		)
Gross deferred tax liabilities		(264		)		(568		)
Net deferred taxes		$	—			$	—

Schedule of Unrecognized Tax Benefits Rollforward

The table below shows the changes in the gross amount of unrecognized tax benefits for the periods presented (in thousands):

		Year Ended December 31,
		2017				2016				2015
Unrecognized benefit — beginning of period		$	2,805			$	2,485			$	1,975
Gross increases — current year tax positions		310				324				522
Gross decreases — prior year tax positions		—				(4		)		(12		)
Unrecognized benefit — end of period		$	3,115			$	2,805			$	2,485

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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Tabular disclosure of the change in unrecognized tax benefits.

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