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Note H - Income Taxes - Reconciliation of Income Tax to Statutory Rate (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2017
Apr. 30, 2016
Apr. 30, 2015
Tax provision at statutory rate $ 11,285 $ 6,474 $ 16,463
State taxes, net of federal benefit 868 443 1,172
Other, net (116) (15) (91)
Total $ 12,037 $ 6,902 $ 17,544