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Income Taxes (Narrative) (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Oct. 18, 2015
USD ($)
Oct. 18, 2015
USD ($)
Operating Loss Carryforwards [Line Items]    
U.S. statutory rate 35.00% 35.00%
Operating loss carryforwards valuation allowance $ 2.4 $ 2.4
State and Local Jurisdiction [Member]    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 2.1 2.1
Domestic Tax Authority [Member]    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 5.6 5.6
Foreign Tax Authority [Member]    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 8.0 8.0
Research Tax Credit Carryforward [Member] | State and Local Jurisdiction [Member]    
Operating Loss Carryforwards [Line Items]    
Tax credit carryforward amount $ 2.1 $ 2.1