Note 5 - Concentrations (Details Textual)	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2024
Revenue from Contract with Customer, Including Assessed Tax	$ 749,510	$ 696,496	$ 2,447,391	$ 2,213,317
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Number of Customers	2	2	2	2
Concentration Risk, Percentage		53.00%		44.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Concentration Risk, Percentage	54.00%		48.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Foreign Customers [Member]
Concentration Risk, Percentage	9.00%	6.00%	12.00%	11.00%
Revenue from Contract with Customer, Including Assessed Tax	$ 68,802	$ 40,029	$ 282,984	$ 238,170
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Three Customers [Member]
Concentration Risk, Number of Customers			3
Concentration Risk, Percentage			88.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Four Customers [Member]
Concentration Risk, Number of Customers					4
Concentration Risk, Percentage					89.00%
Accounts Payable Balance [Member] | Vendor Concentration Risk [Member] | One Vendor [Member]
Concentration Risk, Percentage			19.00%
Number of Vendors			1