Note 10 - License Agreements (Details Textual)	12 Months Ended
	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)
Number Of License Agreements	2	2
Revenue from Contract with Customer, Excluding Assessed Tax	$ 6,310,000	$ 10,785,000
License [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	386,000	336,000
License [Member] | License, Excluding Sell-off Agreements [Member
Revenue from Contract with Customer, Excluding Assessed Tax	$ 386,000	$ 336,000