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Note F - Debt Facilities - Summary of Debt Facilities (Details) - USD ($)
$ in Thousands
Apr. 30, 2018
Apr. 30, 2017
Debt issuance costs $ (435) $ (593)
Debt facilities 152,367 117,944
Line of Credit [Member]    
Debt facilities, gross 151,380 118,124
Notes Payable [Member]    
Debt facilities, gross 305 413
Capital Lease Obligations [Member]    
Debt facilities, gross $ 1,117