Note 2 - Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Mar. 31, 2024
Cash, Uninsured Amount	$ 181,000		$ 181,000		$ 287,000
Contract with Customer, Liability, Revenue Recognized	21,000	$ 128,000	97,000	$ 212,000
Advertising Expense	$ 3,680	$ 5,908	$ 8,114	$ 17,041
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			200,000	200,000
Earnings Per Share, Basic	$ (0)	$ (0)	$ (0)	$ (0.01)
Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years		5 years
Maximum [Member]
Property, Plant and Equipment, Useful Life	7 years		7 years