For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

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+ Details

Note 6 - Accounts Receivable - Related Party (Details Textual) - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2021	Mar. 31, 2020
Accounts Receivable, Allowance for Credit Loss, Ending Balance		$ 300,000	$ 225,000
Qol [Member]
Due from Related Parties, Total		330,090
Accounts Receivable, Allowance for Credit Loss, Ending Balance		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%