Note 2 - Summary of Significant Accounting Policies - Estimated Useful Lives and Rates of Equipment (Details)	12 Months Ended
	Mar. 31, 2022
Furniture and Fixtures [Member] | Minimum [Member]
Rate	20.00%
Furniture and Fixtures [Member] | Maximum [Member]
Rate	30.00%
Computer Equipment [Member]
Rate	30.00%
Laboratory Equipment [Member]
Rate	30.00%
Production Equipment [Member] | Minimum [Member]
Rate	10.00%
Production Equipment [Member] | Maximum [Member]
Rate	30.00%