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Note 7 - Due From Affiliate (Details Textual) - USD ($)	12 Months Ended
Note 7 - Due From Affiliate (Details Textual) - USD ($)	Mar. 31, 2018	Dec. 31, 2022	Mar. 31, 2022
Qol [Member]
Accounts Receivable, Allowance for Credit Loss, Ending Balance		$ 250,000	$ 250,000
Qol [Member] \| Engineering Services [Member]
Related Party Transaction, Amounts of Transaction	$ 330,090
Qol [Member]
Equity Method Investments		$ 75,000
Equity Method Investment, Ownership Percentage		23.20%