Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of Components of Loss Before Provision for (Benefit from) Income Taxes

The components of the Company’s loss before provision for (benefit from) income taxes were as follows:

	Years Ended December 31,
	2016			2015			2014
United States of America	$	(7,595	)	$	(17,173	)	$	(26,427	)
International		(7,481	)		(15,171	)		(8,200	)
	$	(15,076	)	$	(32,344	)	$	(34,627	)

Schedule of Components of (Benefit from) Provision for Income Taxes

The components of the provision for (benefit from) income taxes were as follows:

	Years Ended December 31,
	2016			2015			2014
Current income tax provision
Federal	$	—		$	—		$	—
State		58			111			101
Foreign		1,708			1,193			700
Total current income tax provision		1,766			1,304			801
Deferred income tax benefit
Federal		—			—			(2,094	)
State		—			—			(191	)
Foreign		(362	)		(299	)		28
Total deferred income tax benefit		(362	)		(299	)		(2,257	)
Provision for (benefit from) income taxes	$	1,404		$	1,005		$	(1,456	)

Differences in Total Provision for (Benefit from) Income Taxes

The differences in the total provision for (benefit from) income taxes that would result from applying the 34% federal statutory rate to loss before provision for (benefit from) income taxes and the reported provision for (benefit from) income taxes were as follows:

	Years Ended December 31,
	2016			2015			2014
Tax benefit at U.S. statutory rate	$	(5,126	)	$	(10,997	)	$	(11,773	)
State income taxes, net of federal benefit		(147	)		(104	)		(105	)
Foreign income and withholding taxes		4,317			6,033			3,593
Stock-based compensation		2,231			1,039			984
Change in valuation allowance		155			3,807			5,982
Research and development credits		(736	)		(1,067	)		(807	)
Uncertain tax positions		1,146			1,277			52
Provision to return adjustments		(484	)		848			(53	)
Other		48			169			671
	$	1,404		$	1,005		$	(1,456	)

Schedule of Components of Company's Deferred Tax Assets (Liabilities)

Major components of the Company’s deferred tax assets (liabilities) as of December 31, 2016 and 2015 are as follows:

	December 31,
	2016			2015
Net operating loss	$	32,551		$	32,703
Accruals and reserves		2,934			2,887
Research and development credits		7,368			6,247
Stock-based compensation		4,622			5,028
Property and equipment and intangible assets		(1,855	)		(2,036	)
Other		2,842			2,802
Net deferred tax assets		48,462			47,631
Valuation allowance		(49,382	)		(48,913	)
Total noncurrent net deferred tax liabilities, net of valuation allowance	$	(920	)	$	(1,282	)

Change in Unrecognized Tax Benefits

The aggregate changes in the balance of gross unrecognized tax benefits were as follows:

Ending balance as of December 31, 2013	$	1,088
Increase in balances related to tax positions taken during the current period		394
Increase in balances related to tax positions taken during the prior period		99
Ending balance as of December 31, 2014		1,581
Increase in balances related to tax positions taken during the current period		3,196
Increase in balances related to tax positions taken during the prior period		2,781
Ending balance as of December 31, 2015		7,558
Decrease in balances related to tax positions taken during the current period		(2	)
Increase in balances related to tax positions taken during the prior period		1,240
Ending balance as of December 31, 2016	$	8,796