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Note 11 - Treasury Stock and Repurchase Program (Tables) | 3 Months Ended
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Jul. 31, 2018
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, 2018 (1)(2) |  |  | 308,380 |  |  | $ | 4,135 |  |  | $ | 13.41 |  |  | $ | 255 |
Purchases effected in open market during the months ended (2): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
May 31, 2018 |  |  | 2,286 |  |  |  | 46 |  |  |  | 20.26 |  |  |  | 209 |
June 30, 2018 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
July 31, 2018 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Balance as of July 31, 2018 |  |  | 310,666 |  |  | $ | 4,181 |  |  | $ | 13.46 |  |  | $ | 209 |

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