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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Taxes [Abstract]

Summary of Detail of Deferred Tax Assets and Liabilities



		2017			2016
Deferred tax assets (liabilities):
Net operating loss carryforward		$	64,776		$	84,056
Research and development and AMT credit carryforwards, net			5,339			5,446
Equity compensation			6,955			8,406
Accruals and reserves			874			914
Inventories			588			1,503
Intangible assets			(11,297)			(16,922)
Property and equipment, net			(339)			(1,487)
Other, net			179			66
Subtotal			67,075			81,982
Less valuation allowance			(66,973)			(81,982)
Total		$	102		$	—



Summary Of Company's Provision for Income Taxes



		2017			2016			2015
Current Tax Expense
Federal		$	—		$	—		$	2
State			44			32			34
Foreign			72			8			—
Total current tax expense			116			40			36
Deferred Tax Expense
Federal		$	18,485		$	(7,333)		$	(7,154)
State			(1,337)			210			(398)
Foreign			(2,241)			(1,177)			(955)
Change in valuation allowance			(15,009)			8,300			8,507
Total deferred tax expense			(102)			—			—
Total tax expense		$	14		$	40		$	36



Summary Of Difference Between Effective Income Tax Rates and Federal Statutory Rate



		2017						2016						2015
Federal tax at statutory rate		34.00	%		$	(9,139)		34.00	%		$	(11,322)		34.00	%		$	(9,240)
Federal tax rate change		(109.68)				29,480
Federal R&D credit		(0.40)				107		2.89				(962)		3.23				(878)
Federal NOL adjustment for ASU		10.48				(2,816)
Valuation allowance		55.84				(15,009)		(24.93)				8,300		(31.30)				8,507
State income taxes		4.81				(1,292)		(0.69)				231		1.38				(375)
Foreign NOL rate change		1.30				(348)		(1.36)				452		(2.02)				549
Foreign tax rate differential		(2.45)				658		(1.62)				539		(1.99)				542
Permanent differences and other		6.05				(1,627)		(8.41)				2,802		(3.43)				931
Effective tax rate		(0.05)	%		$	14		(0.12)	%		$	40		(0.13)	%		$	36



Summary Of Reconciliation of Change in Federal and State Unrecognized Tax Benefits



		2017			2016			2015
Balance at the beginning of the year		$	3,175		$	1,982		$	1,982
Increases (decreases) for prior year tax positions			(2,018)			1,193			—
Increases (decreases) for current year tax positions			—			—			—
Increases (decreases) related to settlements			—			—			—
Decreases related to statute lapse			—			—			—
Balance at the end of the year		$	1,157		$	3,175		$	1,982



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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of the change in unrecognized tax benefits.

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