XML 50 R40.htm IDEA: XBRL DOCUMENT v3.3.1.900
Loans Payable and Long-Term Debt (Narrative) (Details)
9 Months Ended
Jan. 31, 2016
USD ($)
Jan. 25, 2016
USD ($)
Jan. 31, 2016
USD ($)
Jan. 31, 2015
USD ($)
Debt Instrument [Line Items]        
Ratio of total liabilities to tangible net worth     0.6  
Ratio of cash flow to fixed charges     3.2  
Proceeds from long-term debt     $ 2,805,000 $ 0
New Markets Tax Credit, investment by investors   $ 2,300,000    
New Markets Tax Credit, recapture period   7 years    
Loans Payable [Member]        
Debt Instrument [Line Items]        
Debt instrument, face amount   $ 6,600,000.0    
Debt instrument, term   30 years    
Debt instrument, interest rate   1.20%    
Proceeds from long-term debt $ 2,800,000      
Deferred finance costs   $ 300,000    
Deferred finance costs, amortization period   30 years    
Other Noncurrent Assets [Member]        
Debt Instrument [Line Items]        
Loan receivable   $ 4,300,000    
Maximum [Member]        
Debt Instrument [Line Items]        
Ratio of total liabilities to tangible net worth     1.4  
Minimum [Member]        
Debt Instrument [Line Items]        
Ratio of cash flow to fixed charges     1.5