Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of Components of Income (Loss) Before Income Taxes

Components of income (loss) before income taxes (in thousands):

	Years ended December 31,
	2015			2014			2013
United States operations	$	(76,450	)	$	(67,186	)	$	(50,032	)
Foreign operations	(6,231		)	(3,349		)	(4,055		)
Income (loss) before income taxes	$	(82,681	)	$	(70,535	)	$	(54,087	)

Schedule of Components of Income Tax Expense (Benefit)

Components of income tax expense (benefit) (in thousands):

	Years ended December 31,
	2015			2014			2013
Current:
United States federal	$	176		$	547		$	2,460
State and local	(44		)	69			61
Foreign	592			901			1,706
Total current	724			1,517			4,227
Deferred:
United States federal	(1,636		)	21			(1,890		)
State and local	1			(40		)	51
Foreign	77			(218		)	2,515
Total deferred	(1,558		)	(237		)	676
Total income tax expense (benefit)	$	(834	)	$	1,280		$	4,903

Schedule of Effective Income Tax Rate Reconciliation

Income tax expense differs from “expected” income tax expense (computed by applying the U.S. federal income tax rate of 35%) due to the following (in thousands):

	Years ended December 31,
	2015			2014			2013
United States federal tax expense (benefit) at statutory rate	$	(28,938	)	$	(24,687	)	$	(18,930	)
State taxes, net of United States federal tax expense (benefit)	(1,240		)	(1,083		)	(841		)
Change in valuation allowance	27,821			27,759			25,046
Non-deductible stock compensation	218			270			415
Impact of non-U.S. jurisdictional tax rate difference	648			529			487
Research and development tax credit	(243		)	(325		)	(1,632		)
Increase (reversal) of unrecognized tax benefits	(1,269		)	(901		)	671
Non-U.S. withholding tax	141			393			1,805
Other	2,028			(675		)	(2,118		)
Total income tax expense (benefit)	$	(834	)	$	1,280		$	4,903

Schedule of Net Deferred Tax Assets

Net deferred tax assets are comprised of the following (in thousands):

	December 31,
	2015			2014
Deferred tax assets:
United States federal net operating loss carryforwards	$	84,426		$	66,547
Deferred expenses	1,591			2,552
Research and development tax credit carryforwards	24,442			22,979
Alternative minimum tax credit carryforward	3,626			3,626
Net unrealized loss on investments	97			97
Accrued loss on excess office facilities	959			—
Stock-based compensation	11,441			11,398
State net operating loss carryforwards	10,079			8,400
Foreign net operating loss carryforwards	30,657			34,210
Deferred revenue	82			401
Equipment, software, and leasehold improvements	4,263			3,252
Intangibles	12			19
Other	5,150			4,332
Gross deferred tax assets	176,825			157,813
Less valuation allowance	173,872			149,474
Gross deferred tax assets, net of valuation allowance	$	2,953		$	8,339
Deferred tax liabilities:
Other intangible assets	$	(404	)	$	(3,035	)
Net unrealized gains and basis differences on investments	(78		)	(4,226		)
Other	(218		)	(397		)
Prepaid expenses	(1,384		)	(1,360		)
Gross deferred tax liabilities	(2,084		)	(9,018		)
Net deferred tax assets (liabilities)	$	869		$	(679	)

Schedule of Unrecognized Tax Benefits

Reconciliation of the beginning and ending balances of the total amounts of unrecognized tax benefits (in thousands):

	Years ended December 31,
	2015			2014			2013
Balance, beginning of year	$	3,541		$	4,505		$	3,978
Decreases related to prior year tax positions	(33		)	(196		)	(125		)
Settlements with taxing authorities	(3,285		)	—			—
Increases related to current year tax positions	97			130			652
Expiration of the statute of limitations	—			(898		)	—
Balance, end of year	$	320		$	3,541		$	4,505