Note 2 - Significant Accounting Policies (Details Textual) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023
Cash, Uninsured Amount	$ 466,000		$ 466,000		$ 638,000
Contract with Customer, Liability, Revenue Recognized	57,000	$ 27,000	84,000	$ 62,000
Advertising Expense	$ 4,434	$ 8,796	$ 11,133	$ 15,031
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			0	0
Earnings Per Share, Basic	$ (0.00)	$ 0.00	$ (0.01)	$ 0.00
Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years		5 years
Maximum [Member]
Property, Plant and Equipment, Useful Life	7 years		7 years