Note 2 - Significant Accounting Policies -Disaggregation of Revenue (Details) - USD ($)	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenue	$ 3,197,110	$ 2,965,406
Chemical [Member]
Revenue	1,086,707	1,101,016
Electronics [Member]
Revenue	1,526,236	1,512,692
Engineering [Member]
Revenue	584,167	351,698
UNITED STATES
Revenue	2,856,133	2,652,700
UNITED STATES \| Chemical [Member]
Revenue	745,730	788,310
UNITED STATES \| Electronics [Member]
Revenue	1,526,236	1,512,692
UNITED STATES \| Engineering [Member]
Revenue	584,167	351,698
Non-US [Member]
Revenue	340,977	312,706
Non-US [Member] \| Chemical [Member]
Revenue	340,977	312,706
Non-US [Member] \| Electronics [Member]
Revenue	0	0
Non-US [Member] \| Engineering [Member]
Revenue	$ 0	$ 0

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.

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+ Details

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