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Note 11 - Treasury Stock and Repurchase Program (Tables) | 6 Months Ended
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Oct. 31, 2019
Notes Tables |
Class of Treasury Stock [Table Text Block] |
(in thousands except for shares and cost per share) |  | Shares |  |  | Total Average Cost Assigned |  |  | Average Cost per Share |  |  | Aggregate Purchase Price Remaining Under the Program |
Balance as of April 30, 2019 (1), (2), (3) |  |  | 336,439 |  |  | $ | 4,743 |  |  | $ | 14.10 |  |  | $ | 1,438 |
Purchases effected in open market during the quarters ended: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
July 31, 2019 |  |  | 3,857 |  |  |  | 92 |  |  |  | 23.88 |  |  |  | 1,346 |
October 31, 2019 |  |  | 12,636 |  |  |  | 301 |  |  |  | 23.78 |  |  |  | 1,045 |
Balance as of October 31, 2019 |  |  | 352,932 |  |  | $ | 5,136 |  |  | $ | 14.55 |  |  | $ | 1,045 |

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