Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Taxes

Component of Loss Before Income Taxes By Tax Jurisdiction

	Year Ended December 31,
	2016		2015		2014
United States	$	(87,085)	$	(7,819)	$	5,283
Foreign		(656)		775		(4,690)
Income/(loss) before income taxes	$	(87,741)	$	(7,044)	$	593

Components of Income Tax Provision

	Year Ended December 31,
Current:	2016		2015		2014
Federal	$	127	$	(24)	$	(5)
State		(6)		(5)		(5)
Foreign		(86)		(183)		656
		35		(212)		646
Deferred:
Federal		328		—		6,821
Foreign		(62)		71		88
		266		71		6,909
Total:
Federal		455		(24)		6,816
State		(6)		(5)		(5)
Foreign		(148)		(112)		744
	$	301	$	(141)	$	7,555

Difference Between Actual Rate and Federal Statutory Rate

	Year Ended December 31,
	2016		2015		2014
Tax at federal statutory rate	34.0	%	34.0	%	34.0	%
State tax, net of federal benefit	—		(0.1)		0.8
Foreign rate differential	(0.1)		1.0		56.6
Research and development credit	0.9		15.9		(133.9)
Warrants	—		—		67.7
Withholding taxes	0.2		0.3		(10.5)
Stock-based compensation	(2.9)		(8.7)		224.9
Non-deductible intercompany bad debt	—		—		3.9
FIN 48 interest and release	(0.1)		1.8		(219.4)
Other	(0.1)		(0.2)		59.6
Deemed dividend from foreign liquidation	(1.4)		—		—
Valuation allowance	(30.2)		(46.1)		(1,357.7)
Effective tax rate	0.3	%	(2.1)	%	(1,274.0)	%

Deferred Tax Assets and Liabilities

	December 31, 2016						December 31, 2015
	US		Foreign		Total		US		Foreign		Total
Deferred tax assets:
Fixed assets	$	191	$	40	$	231	$	—	$	1,156	$	1,156
Net operating loss carryforwards		55,850		526		56,376		37,907		9,493		47,400
Accruals, reserves and other		12,006		97		12,103		4,811		129		4,940
Foreign tax credit		6,460		—		6,460		6,615		—		6,615
Stock-based compensation		3,830		—		3,830		4,866		—		4,866
Research and development credit		11,190		—		11,190		9,292		—		9,292
Other		2,011		—		2,011		121		17		138
Total deferred tax assets	$	91,538	$	663	$	92,201	$	63,612	$	10,795	$	74,407
Deferred tax liabilities:
Fixed assets	$	—	$	(1)	$	(1)	$	(290)	$	—	$	(290)
Intangible assets		(4,441)		(6)		(4,447)		(4,471)		(54)		(4,525)
Other		—		—		—		—		(16)		(16)
Net deferred tax assets		87,097		656		87,753		58,851		10,725		69,576
Less valuation allowance		(87,097)		(464)		(87,561)		(58,851)		(10,470)		(69,321)
Net deferred tax assets	$	—	$	192	$	192	$	—	$	255	$	255

Reconciliation of Total Amounts of Unrecognized Tax Benefits

	Year Ended December 31,
	2016		2015
Beginning balance	$	9,218	$	6,794
Reductions of tax positions taken during previous years		(806)		(304)
Additions based on uncertain tax positions related to the current period		2,590		2,085
Additions based on uncertain tax positions related to prior periods		43		675
Cumulative translation adjustment		(34)		(32)
Ending balance	$	11,011	$	9,218