Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Inventory reserve	$ 902	$ 838
Other reserves and allowances	4,233	5,365
Income tax basis in excess of financial statement basis in intangible assets	3,394	4,267
Deductible stock-based compensation	4,693	4,615
Net operating loss carryforward	9,496	8,667
Tax credit carryforwards	2,758	2,099
Total deferred tax assets, gross	25,476	25,851
Total deferred tax assets	(8,292)	(6,500)
Total deferred tax assets	17,184	19,351
Deferred tax liabilities:
Prepaid & other expenses	(139)	(867)
Fixed assets	(5,913)	(6,013)
Intangible assets	(21,392)	(22,411)
Total deferred tax liabilities	(27,444)	(29,291)
Net deferred tax liability	$ (10,260)	$ (9,940)