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Nature of Business and Summary of Significant Accounting Policies - Principles of Consolidation (Details) (Outcast, USD $)
Apr. 27, 2013
Apr. 28, 2012
Apr. 30, 2011
Outcast
     
Noncontrolling Interest [Line Items]      
Ownership percentage 7.00% 7.00%  
Equity Method Investments     $ 0
Cost method investee, carrying balance $ 106,000 $ 106,000