Note 5 - Intangible Assets (Details Textual) - USD ($) |
12 Months Ended | |
|---|---|---|
Mar. 31, 2022 |
Mar. 31, 2021 |
|
| Finite-Lived Intangible Assets, Remaining Amortization Period (Year) | 6 years | |
| Amortization of Intangible Assets | $ 2,880 | $ 2,882 |
| Minimum [Member] | ||
| Finite-Lived Intangible Asset, Useful Life (Year) | 10 years | |
| Maximum [Member] | ||
| Finite-Lived Intangible Asset, Useful Life (Year) | 15 years | |