NOTE 5. MARKETABLE SECURITIES: Amortized cost, fair value and gross unrealized holding gains and losses of marketable securities (Details) - USD ($)	Dec. 31, 2023	Mar. 31, 2023
Amortized Cost	$ 55,230,181	$ 54,098,122
Gross Unrealized Holding Gains	7,965	1,007
Gross Unrealized Holding Losses	(972,273)	(1,554,846)
Marketable Securities	54,265,873	52,544,283
Money Market Funds
Amortized Cost	4,259,340	906,141
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	0
Marketable Securities	4,259,340	906,141
Corporate Bond Securities
Amortized Cost	50,970,841	53,191,981
Gross Unrealized Holding Gains	7,965	1,007
Gross Unrealized Holding Losses	(972,273)	(1,554,846)
Marketable Securities	$ 50,006,533	$ 51,638,142