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Note 9 - Lease Commitments (Tables)
12 Months Ended
Apr. 30, 2016
Notes Tables  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Fiscal Years Ended April 30,   ($ in thousands)  
         
2017
    1,417  
2018
    199  
2019
    204  
2020
    211  
2021
    217  
2022 and thereafter
    691  
    $ 2,939