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Income Taxes - Deferred Tax Assets and Liabilities Current and Non Current (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 27, 2013
Apr. 28, 2012
Income Tax Disclosure [Abstract]    
Current assets $ 12,755 $ 10,941
Current liabilities 0 (42)
Non-current assets 1,061 30
Non-current liabilities 0 (1,453)
Deferred tax assets, net $ 13,816 $ 9,476