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Note 6 - Shareholders' Equity (Tables) | 12 Months Ended
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Mar. 31, 2022
Notes Tables |
Dividends Declared [Table Text Block] |
Declaration Date |  | Per Share Dividend |  | Record Date |  | Total Amount (In thousands) |  | Payment Date
May 3, 2021 |  |  | $0.30 |  | May 14, 2021 |  |  | $6,081 |  | May 21, 2021
July 26, 2021 |  |  | $0.30 |  | August 6, 2021 |  |  | $6,102 |  | August 13, 2021
October 25, 2021 |  |  | $0.30 |  | November 8, 2021 |  |  | $6,283 |  | November 19, 2021
January 24, 2022 |  |  | $0.30 |  | February 7, 2022 |  |  | $6,294 |  | February 18, 2022

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