Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Income (Loss) Before Income Tax Provision

Loss from operations before income taxes consists of the following (in thousands):

	Year ended December 31,
	2016			2015			2014
United States	$	(53,833	)	$	(16,826	)	$	(15,515	)
International	(26,597		)	758			(6,280		)
Loss before income taxes	$	(80,430	)	$	(16,068	)	$	(21,795	)

Provision for Income Taxes

The components of the provision for (benefit from) income taxes consist of the following (in thousands):

	Year ended December 31,
	2016			2015			2014
Current:
Federal	$	(950	)	$	(1,981	)	$	(11,525	)
State	181			120			8
International	2,738			1,966			1,619
Deferred:
Federal	(713		)	—			25,722
State	—			—			8,249
International	(9,372		)	(512		)	380
Total provision for (benefit from) income taxes	$	(8,116	)	$	(407	)	$	24,453

Reconciliation of Provision for Income Taxes

The differences between the provision for (benefit from) income taxes computed at the U.S. federal statutory rate at 35% and the Company’s actual provision for (benefit from) income taxes are as follows (in thousands):

	Year ended December 31,
	2016			2015			2014
Benefit from for income taxes at U.S. Federal statutory rate	$	(28,150	)	$	(5,624	)	$	(7,628	)
State taxes	150			120			5,368
Differential in rates on foreign earnings	11,741			1,584			4,311
Non-deductible amortization expense	617			947			3,138
Change in valuation allowance	4,465			2,230			26,053
Change in liabilities for uncertain tax positions	(960		)	(1,083		)	(8,126		)
Non-deductible stock-based compensation	1,480			1,398			1,665
Research and development tax credits	(129		)	(178		)	(841		)
Non-deductible meals and entertainment	441			395			361
Non-deductible acquisition cost	—			457			—
Adjustments related to tax positions taken during prior years	(163		)	(781		)	—
Adjustments made under intercompany transactions	1,779			—			—
Withholding tax	457			—			—
Other	156			128			152
Total provision for (benefit from) income taxes	$	(8,116	)	$	(407	)	$	24,453

Components of Deferred Tax Assets and Liabilities

The components of net deferred tax assets included in the Consolidated Balance Sheets are as follows (in thousands):

	December 31,
	2016			2015
Deferred tax assets:
Reserves and accruals	$	25,527		$	16,413
Net operating loss carryovers	33,321			27,023
Research and development credit carryovers	28,759			27,595
Deferred stock-based compensation	4,292			5,834
Depreciation and amortization	554			—
Other tax credits	2,738			2,738
Gross deferred tax assets	95,191			79,603
Valuation allowance	(74,480		)	(64,545		)
Gross deferred tax assets after valuation allowance	20,711			15,058
Deferred tax liabilities:
Depreciation and amortization	—			(1,189		)
Intangibles	(1,417		)	(899		)
Convertible notes	(8,603		)	(10,233		)
Other	(510		)	(510		)
Gross deferred tax liabilities	(10,530		)	(12,831		)
Net deferred tax assets	$	10,181		$	2,227

Activities Related to Valuation Allowance

The following table summarizes the activities related to the Company’s valuation allowance (in thousands):

	Year ended December 31,
	2016			2015			2014
Balance at beginning of period	$	64,545		$	75,199		$	38,644
Additions	18,291			3,068			39,556
Deductions	(8,356		)	(13,722		)	(3,001		)
Balance at end of period	$	74,480		$	64,545		$	75,199

Activities Related to Gross Unrecognized Tax Benefits

The following table summarizes the activity related to the Company’s gross unrecognized tax benefits (in millions):

	Year ended December 31,
	2016			2015			2014
Balance at beginning of period	$	15.6		$	15.7		$	24.2
Increase in balance related to tax positions taken during current year	4.6			0.7			1.0
Decrease in balance as a result of a lapse of the applicable statues of limitations	(1.0		)	(0.9		)	(9.5		)
Increase in balance related to tax positions taken during prior years	—			0.3			—
Decrease in balance related to tax positions taken during prior years	—			(0.2		)	—
Balance at end of period	$	19.2		$	15.6		$	15.7