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Long-Term Debt (Narrative) (Details)
$ in Thousands
1 Months Ended 3 Months Ended
May. 01, 2015
USD ($)
Jul. 31, 2014
USD ($)
Jul. 31, 2015
USD ($)
item
Apr. 30, 2015
USD ($)
Wells Fargo Credit Agreement [Member]        
Debt Instrument [Line Items]        
Number of term loans | item     2  
Number of revolving lines of credit | item     1  
2014 Amended Credit Agreement        
Debt Instrument [Line Items]        
Maturity date     Jun. 30, 2017  
Term Note A [Member]        
Debt Instrument [Line Items]        
Term loan amount   $ 10,100 $ 7,313 $ 9,317
Quarterly principal payment $ 300   300  
Repayment of debt $ 1,500   $ 300  
Term Note A [Member] | LIBOR [Member]        
Debt Instrument [Line Items]        
Basis spread on variable reference rate     6.00%  
Term Note B [Member]        
Debt Instrument [Line Items]        
Stated interest rate, minimum   12.00%