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Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Deferred tax assets:    
Reserves and allowances not currently deductible for tax purposes $ 14,292 $ 15,861
Basis difference related to fixed assets 10,170 10,943
Compensation and benefits 8,964 8,147
Basis difference for inventory valuation 1,764 1,526
Compensatory stock options and rights 3,659 4,334
Deferred revenue and other 169 201
Operating loss carryforwards 96,067 100,227
Tax credit carryforwards 19,787 15,987
Basis difference related to intangible assets with a definite life 16,617 15,557
Deferred Tax Assets, Other (162) 435
Total deferred tax assets 171,327 173,218
Valuation allowance for deferred tax assets (164,616) (165,427)
Deferred tax liabilities:    
Prepaid expenses (868) (1,368)
Basis difference related to intangible assets with an indefinite life (33,974) (34,065)
Total deferred tax liabilities (34,842) (35,433)
Net deferred tax liabilities (28,131) (27,642)
Deferred Tax Assets, Net of Valuation Allowance 6,711 7,791
Net deferred tax assets are shown on the accompanying consolidated balance sheets as follows:    
Current deferred tax assets 0 5,081
Non-current deferred tax assets 6,962 2,346
Current deferred tax liabilities 0 (26)
Non-current deferred tax liabilities $ (35,093) $ (35,043)