Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Inventory reserve	$ 700	$ 902
Other reserves and allowances	370	4,455
Income tax basis in excess of financial statement basis in intangible assets	1,669	3,394
Deductible stock-based compensation	3,687	4,579
Net operating loss carryforward	13,669	10,070
Tax credit carryforwards	428	2,600
Total deferred tax assets, gross	20,523	26,000
Total deferred tax assets	(10,711)	(8,292)
Total deferred tax assets	9,812	17,708
Deferred tax liabilities:
Prepaid & other expenses	(265)	(138)
Fixed assets	(4,946)	(5,913)
Intangible assets	(15,953)	(21,392)
Total deferred tax liabilities	(21,164)	(27,443)
Net deferred tax liability (as restated)	$ (11,352)	$ (9,735)