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Note 13 - Treasury Stock and Repurchase Program (Tables) | 12 Months Ended
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Apr. 30, 2019
Notes Tables |
Class of Treasury Stock [Table Text Block] |
($ in thousands except for cost per share) |  | Shares |  |  | Cost Assigned |  |  | Average Cost per Share |  |  | Aggregate Purchase Price Remaining Under the Program |
Balance as of April 30, 2016 (1) |  |  | 243,411 |  |  | $ | 3,040 |  |  | $ | 12.49 |  |  | $ | 1,350 |
Purchases effected in open market (2) |  |  | 44,924 |  |  | $ | 741 |  |  | $ | 16.51 |  |  | $ | 609 |
Balance as of April 30, 2017 |  |  | 288,335 |  |  | $ | 3,781 |  |  | $ | 13.11 |  |  | $ | 609 |
Purchases effected in open market (2) |  |  | 20,045 |  |  | $ | 354 |  |  | $ | 17.67 |  |  | $ | 255 |
Balance as of April 30, 2018 |  |  | 308,380 |  |  | $ | 4,135 |  |  | $ | 13.41 |  |  | $ | - |
Purchases effected in open market (2) (3) |  |  | 28,059 |  |  | $ | 608 |  |  | $ | 21.68 |  |  | $ | 1,438 |
Balance as of April 30, 2019 |  |  | 336,439 |  |  | $ | 4,743 |  |  | $ | 14.10 |  |  | $ | 1,438 |

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