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Income Taxes (Significant Components of Deferred Tax Assets and Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 29, 2014
Mar. 30, 2013
Deferred tax assets:    
Inventory valuation $ 7,692 $ 12,065
Accrued expenses and allowances 3,905 5,077
Net operating loss carryforwards 29,062 28,162
Research and development tax credit carryforwards 15,164 37,054
State tax credit carryforwards 231 237
Capitalized research and development 3,485 6,601
Other 28,627 21,505
Total deferred tax assets 88,166 110,701
Valuation allowance for deferred tax assets (32,159) (23,232)
Net deferred tax assets 56,007 87,469
Deferred tax liabilities:    
Depreciation and amortization 5,709 5,238
Acquisition intangibles 3,209 623
Total deferred tax liabilities 8,918 5,861
Total net deferred tax assets $ 47,089 $ 81,608