NOTE 5. MARKETABLE SECURITIES: Amortized cost, fair value and gross unrealized holding gains and losses of marketable securities (Details) - USD ($)	Dec. 31, 2024	Mar. 31, 2024
Amortized Cost	$ 50,098,612	$ 53,544,316
Gross Unrealized Holding Gains	40,688	930
Gross Unrealized Holding Losses	(418,463)	(996,370)
Marketable Securities	49,720,837	52,548,876
Money Market Funds
Amortized Cost	5,109,218	9,842,796
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	0
Marketable Securities	5,109,218	9,842,796
US Treasury Securities
Amortized Cost	4,699,645	0
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	(12,864)	0
Marketable Securities	4,686,781	0
Corporate Bond Securities
Amortized Cost	40,289,749	43,701,520
Gross Unrealized Holding Gains	40,688	930
Gross Unrealized Holding Losses	(405,599)	(996,370)
Marketable Securities	$ 39,924,838	$ 42,706,080