Note 2 - Significant Accounting Policies (Details Textual) - USD ($) $ / shares in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025
Cash, Uninsured Amount	$ 71,000		$ 71,000		$ 133,000
Contract With Customer, Liability, Revenue Recognized During Period	58,000		100,000
Contract with Customer, Liability, Revenue Recognized	24,000		76,000
Advertising Expense	3,037	$ 1,282	5,047	$ 4,434
Shipping and Handling Costs	$ 4,635	$ 2,938	$ 4,635	$ 5,739
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	200,000
Earnings Per Share, Basic	$ (0)	$ (0)	$ 0	$ 0
Retained Earnings (Accumulated Deficit)	$ (32,761,142)		$ (32,761,142)		$ (32,970,220)
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation	$ (63,282)		$ (63,282)	$ (437,911)
Domestic Tax Jurisdiction [Member]
Open Tax Year	2021 2022 2023 2024 2025
State and Local Jurisdiction [Member] | New Jersey Division of Taxation [Member]
Open Tax Year			2020 2021 2022 2023 2024 2025
Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years		5 years
Maximum [Member]
Property, Plant and Equipment, Useful Life	7 years		7 years