NOTE 5. MARKETABLE SECURITIES: Estimated fair value of marketable securities aggregated by fair value hierarchy inputs used in estimating their fair values (Details) - USD ($)	Jun. 30, 2024	Mar. 31, 2024
Marketable Securities	$ 52,951,591	$ 52,548,876
Money Market Funds
Marketable Securities	5,775,400	9,842,796
Corporate Bond Securities
Marketable Securities	47,176,191	42,706,080
Fair Value, Inputs, Level 1
Marketable Securities	5,775,400	9,842,796
Fair Value, Inputs, Level 1 | Money Market Funds
Marketable Securities	5,775,400	9,842,796
Fair Value, Inputs, Level 1 | Corporate Bond Securities
Marketable Securities	0	0
Fair Value, Inputs, Level 2
Marketable Securities	47,176,191	42,706,080
Fair Value, Inputs, Level 2 | Money Market Funds
Marketable Securities	0	0
Fair Value, Inputs, Level 2 | Corporate Bond Securities
Marketable Securities	$ 47,176,191	$ 42,706,080