Note 11 - Information as to Employee Stock Purchase, Savings, and Similar Plans (Details Textual) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Dec. 31, 2021 |
Jun. 30, 2021 |
Dec. 31, 2020 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 100.00% | ||||
| Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 3.00% | ||||
| Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 21,579 | $ 22,571 | $ 76,995 | $ 69,227 | |