NOTE 5. MARKETABLE SECURITIES: Amortized cost, fair value and gross unrealized holding gains and losses of marketable securities (Details) - USD ($)	Sep. 30, 2024	Mar. 31, 2024
Amortized Cost	$ 50,859,351	$ 53,544,316
Gross Unrealized Holding Gains	139,857	930
Gross Unrealized Holding Losses	(227,555)	(996,370)
Marketable Securities	50,771,653	52,548,876
Money Market Funds
Amortized Cost	2,653,557	9,842,796
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	0
Marketable Securities	2,653,557	9,842,796
Corporate Bond Securities
Amortized Cost	48,205,794	43,701,520
Gross Unrealized Holding Gains	139,857	930
Gross Unrealized Holding Losses	(227,555)	(996,370)
Marketable Securities	$ 48,118,096	$ 42,706,080