Note 5 - Concentrations (Details Textual)	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2023
Revenue from Contract with Customer, Including Assessed Tax	$ 696,496	$ 983,162	$ 2,213,317	$ 3,044,838
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage	53.00%	50.00%	44.00%	45.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Foreign Customers [Member]
Concentration Risk, Percentage	6.00%	8.00%	11.00%	8.00%
Revenue from Contract with Customer, Including Assessed Tax	$ 40,029	$ 86,296	$ 238,170	$ 237,852
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage			75.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Four Customers [Member]
Concentration Risk, Percentage			91.00%
Accounts Payable Balance [Member] | Vendor Concentration Risk [Member]
Number of Vendors					3
Accounts Payable Balance [Member] | Vendor Concentration Risk [Member] | Three Vendors [Member]
Concentration Risk, Percentage			36.00%		45.00%