Note 9 - Concentrations (Details Textual)	12 Months Ended
Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)
Revenue	$ 3,676,785	$ 3,206,594
Customer Concentration Risk [Member] \| Two Customers [Member] \| Revenue Benchmark [Member]
Concentration Risk, Number of Customers	2
Concentration Risk, Percentage	75.00%	51.00%
Customer Concentration Risk [Member] \| Three Customers [Member] \| Revenue Benchmark [Member]
Concentration Risk, Number of Customers		3
Concentration Risk, Percentage	40.00%	75.00%
Customer Concentration Risk [Member] \| Foreign Customers [Member] \| Revenue Benchmark [Member]
Concentration Risk, Percentage	9.50%	9.00%
Revenue	$ 349,669	$ 286,184

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
-SubTopic 10
-Name Accounting Standards Codification
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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+ Details