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Note H - Reconciliation of Income Tax to Statutory Rate (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2016
Apr. 30, 2015
Apr. 30, 2014
Tax provision at statutory rate $ 6,474 $ 16,463 $ 11,785
State taxes, net of federal benefit 443 1,172 813
Other, net (15) (91) (55)
$ 6,902 $ 17,544 $ 12,543