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NOTE 5. MARKETABLE SECURITIES: Amortized cost, fair value and gross unrealized holding gains and losses of marketable securities (Details) - USD ($)	Sep. 30, 2025	Mar. 31, 2025
Amortized Cost	$ 45,111,104	$ 47,989,000
Gross Unrealized Holding Gains	134,126	71,410
Gross Unrealized Holding Losses	(18,707)	(159,152)
Marketable Securities	45,226,523	47,901,258
Money Market Funds
Amortized Cost	4,742,269	7,905,042
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	0
Marketable Securities	4,742,269	7,905,042
US Treasury Securities
Amortized Cost	4,699,770	4,699,686
Gross Unrealized Holding Gains	27,769	15,552
Gross Unrealized Holding Losses	0	0
Marketable Securities	4,727,539	4,715,238
Corporate Bond Securities
Amortized Cost	35,669,065	35,384,272
Gross Unrealized Holding Gains	106,357	55,858
Gross Unrealized Holding Losses	(18,707)	(159,152)
Marketable Securities	$ 35,756,715	$ 35,280,978

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