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Note 11 - Treasury Stock and Repurchase Program (Tables) | 9 Months Ended
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Jan. 31, 2022
Notes Tables |
Class of Treasury Stock [Table Text Block] |
(in thousands except for shares and cost per share) |  | Shares |  |  | Cost Assigned |  |  | Average Cost per Share |  |  | Aggregate Purchase Price Remaining Under the Program |
Balance as of April 30, 2021 |  |  | 436,830 |  |  | $ | 7,483 |  |  | $ | 17.13 |  |  | $ | 474 |
Purchases effected in open market during the quarters ended: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
July 31, 2021 |  |  | 5,409 |  |  |  | 163 |  |  |  | 30.13 |  |  |  | 2,000 |
October 31, 2021 |  |  | 11,180 |  |  |  | 354 |  |  |  | 31.67 |  |  |  | 1,646 |
January 31, 2022 |  |  | 17,418 |  |  |  | 805 |  |  |  | 46.21 |  |  |  | 841 |
Balance as of January 31, 2022 |  |  | 470,837 |  |  | $ | 8,805 |  |  | $ | 18.70 |  |  | $ | 841 |
Authorized as of March 14, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 2,000 |

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