NOTE 8. INCOME TAXES: Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Details
Income before income taxes	$ 17,816,321	$ 18,038,737
Tax expense at U.S. statutory rate	3,741,427	3,788,135
State income taxes, net of Federal benefit	155,002	158,741
Tax credits (R&D and manufacturing credits)	(1,135,592)	(202,166)
Effect of foreign-derived intangible income deductions	(359,326)	(816,143)
Non-deductible items	934	916
Other	214,681	44,738
Provision for income taxes	$ 2,617,126	$ 2,974,221