Components of Deferred Tax Assets/(Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Deferred Income Tax Assets and Liabilities [Line Items]
Reserve for sales allowances and possible losses	$ 611	$ 801
Accrued expenses	1,375	1,739
Prepaid royalties	13,631	16,806
Accrued royalties	1,864	2,638
Inventory	6,146	3,506
State income taxes	26	98
Property and equipment	4,257	4,997
Original issue discount interest	(2,131)	(6,945)
Goodwill and intangibles	15,782	29,378
Share based compensation	578	1,607
Undistributed foreign earnings	(2,524)	(48,731)
Federal and state net operating loss carryforwards	14,091	22,755
Credit carryforwards	35,195	21,097
Other	22	(2,495)
Gross	88,923	47,251
Valuation allowance	(89,706)	(49,285)
Total net deferred tax liabilities	$ (783)	$ (2,034)

Deferred Tax Assets Accrued Royalties, Current

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Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards.

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