Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Taxes [Abstract]

Income Tax Provision

	For the Year Ended December 31,
	2017		2016		2015
Current tax expense (benefit)
Foreign	$	316	$	315	$	—
Federal		—		—		—
State		—		—		—
Total current tax expense		316		315		—
Deferred tax expense (benefit)
Federal		(485)		(15)		1
State		48		42		(4)
Total deferred tax benefit		(437)		27		(3)
Total income tax expense (benefit)	$	(121)	$	342	$	(3)

Effective Income Tax Rate Reconciliation

	For the Year Ended December 31,
	2017			2016			2015
	Amount		Rate	Amount		Rate	Amount		Rate
Expected federal statutory income tax	$	(27,821)	-35.0%	$	(72,945)	-35.0%	$	(51,480)	-35.0%
State income taxes, net of federal benefits		(8,314)	-10.5%		(9,485)	-4.6%		(4,544)	-3.1%
Change in federal tax rate used for deferred purposes		112,611	141.7%		200	0.1%		972	0.7%
Adjustment to deferred tax assets		15,210	19.1%		—	0.0%		(6,492)	-4.4%
Change in valuation allowance		(91,807)	-115.5%		82,572	39.6%		61,541	41.8%
Income tax expense (benefit )	$	(121)	-0.2%	$	342	0.1%	$	(3)	0.0%

Net Deferred Tax Assets and Liabilities

	For the Year Ended December 31,
	2017		2016
Deferred tax assets
Net operating loss carryforward	$	112,289	$	171,074
Foreign tax credit carryforward		631		315
Capitalized research and development		66,500		78,147
Share-based compensation		18,735		22,233
Loss on equity investment		6,294		5,900
Organization costs		30		46
Depreciation		772		1,050
Intangibles		30,788		47,595
Inventory reserve and other		2,145		3,631
Total deferred tax assets		238,184		329,991
Deferred tax liability
Goodwill		(939)		(1,376)
Total deferred tax liability		(939)		(1,376)
Total deferred tax assets, net		237,245		328,615
Valuation allowance		(238,184)		(329,991)
Deferred tax liability	$	(939)	$	(1,376)