Income Taxes (Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Net operating loss carryforwards	$ 15,210	$ 10,183
Allowance for doubtful accounts	432	369
Inventory valuation reserves	3,734	1,896
Equity compensation	4,250	4,146
Goodwill	6,869	8,963
Accrued compensation	73	75
Foreign tax credit carryforward	865	0
Other	67	1
Total gross deferred tax assets	31,500	25,633
Valuation allowance	(1,093)	(809)
Total deferred tax assets, net	30,407	24,824
Deferred tax liabilities:
Property and equipment	(12,876)	(12,066)
Intangible assets	(18,249)	(18,786)
Convertible debt	(3,011)	(4,126)
Prepaid insurance and other	(216)	(225)
Total gross deferred tax liabilities	(34,352)	(35,203)
Net deferred tax (liabilities) assets	$ (3,945)	$ (10,379)