Income Taxes - Components of Net Deferred Tax Asset or Liability (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Assets
Accrued reserves and allowances	$ 2,314	$ 648
Inventories	284	88
Intangibles	806	180
Net operating loss carryforwards	2,921	2,999
Other current and long-term	2	2
Long-term deferred tax assets	6,327	3,917
Less: Valuation allowance	(2,415)	(1,974)
Net deferred tax assets	3,912	1,943
Deferred Tax Liabilities
Accrued reserves and allowances	(565)	(136)
Property and equipment	(1,505)	(1,475)
Intangibles	(4,899)	(5,626)
Investment in partnership	(9,530)	(8,757)
Other	(62)	(59)
Long-term deferred tax liabilities	(16,561)	(16,053)
Net deferred tax liabilities	$ (12,649)	$ (14,110)