Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

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,
	2016			2015			2014
United States operations	$	(34,100	)	$	(76,450	)	$	(67,186	)

Foreign operations	(1,328		)	(6,231		)	(3,349		)
Income (loss) before income taxes	$	(35,428	)	$	(82,681	)	$	(70,535	)

Schedule of Components of Income Tax Expense (Benefit)

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

	Years ended December 31,
	2016		2015			2014
Current:
United States federal	$	712	$	176		$	547
State and local	59		(44		)	69
Foreign	221		592			901
Total current	992		724			1,517
Deferred:
United States federal	3		(1,636		)	21
State and local	1		1			(40		)
Foreign	126		77			(218		)
Total deferred	130		(1,558		)	(237		)
Total income tax expense (benefit)	$	1,122	$	(834	)	$	1,280

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,
	2016			2015			2014
United States federal tax expense (benefit) at statutory rate	$	(12,400	)	$	(28,938	)	$	(24,687	)
State taxes, net of United States federal tax expense (benefit)	(533		)	(1,240		)	(1,083		)
Change in valuation allowance	13,148			27,821			27,759
Non-deductible stock compensation	144			218			270
Impact of non-U.S. jurisdictional tax rate difference	132			648			529
Research and development tax credit	(338		)	(243		)	(325		)
Increase (reversal) of unrecognized tax benefits	135			(1,269		)	(901		)
Non-U.S. withholding tax	452			141			393
Other	382			2,028			(675		)
Total income tax expense (benefit)	$	1,122		$	(834	)	$	1,280

Schedule of Net Deferred Tax Assets

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

	December 31,
	2016		2015
Deferred tax assets:
United States federal net operating loss carryforwards	$	93,985	$	84,426
Deferred expenses	1,136		1,591
Research and development tax credit carryforwards	24,702		24,442
Alternative minimum tax credit carryforward	3,561		3,626
Net unrealized loss on investments	97		97
Accrued loss on excess office facilities	1,178		959
Stock-based compensation	4,112		11,441
State net operating loss carryforwards	11,354		10,079
Foreign net operating loss carryforwards	29,863		30,657
Deferred revenue	156		82
Equipment, software, and leasehold improvements	4,636		4,263
Intangibles	7		12

Net unrealized gains and basis differences on investments	1,874			—
Other	1,624			5,150
Gross deferred tax assets	178,285			176,825
Less valuation allowance	176,274			173,872
Gross deferred tax assets, net of valuation allowance	$	2,011		$	2,953
Deferred tax liabilities:
Other intangible assets	$	(50	)	$	(404	)
Net unrealized gains and basis differences on investments	—			(78		)
Other	(794		)	(218		)
Prepaid expenses	(438		)	(1,384		)
Gross deferred tax liabilities	(1,282		)	(2,084		)
Net deferred tax assets (liabilities)	$	729		$	869

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,
	2016		2015			2014
Balance, beginning of year	$	320	$	3,541		$	4,505
Increases related to prior year tax positions	38		—			—
Decreases related to prior year tax positions	—		(33		)	(196		)
Settlements with taxing authorities	—		(3,285		)	—
Increases related to current year tax positions	135		97			130
Expiration of the statute of limitations	—		—			(898		)
Balance, end of year	$	493	$	320		$	3,541