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Income Taxes - Deferred Tax Assets and Liabilities Current and Non Current (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 26, 2014
Apr. 27, 2013
Income Tax Disclosure [Abstract]    
Current assets $ 10,694 $ 12,755
Current liabilities (27) 0
Non-current assets 2,000 1,061
Non-current liabilities (1) 0
Deferred tax assets, net $ 12,666 $ 13,816