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, 2025	Mar. 31, 2025
Marketable Securities	$ 47,080,363	$ 47,901,258
Money Market Funds
Marketable Securities	2,782,189	7,905,042
US Treasury Securities
Marketable Securities	4,722,215	4,715,238
Corporate Bond Securities
Marketable Securities	39,575,959	35,280,978
Fair Value, Inputs, Level 1
Marketable Securities	2,782,189	7,905,042
Fair Value, Inputs, Level 1 | Money Market Funds
Marketable Securities	2,782,189	7,905,042
Fair Value, Inputs, Level 1 | US Treasury Securities
Marketable Securities	0	0
Fair Value, Inputs, Level 1 | Corporate Bond Securities
Marketable Securities	0	0
Fair Value, Inputs, Level 2
Marketable Securities	44,298,174	39,996,216
Fair Value, Inputs, Level 2 | Money Market Funds
Marketable Securities	0	0
Fair Value, Inputs, Level 2 | US Treasury Securities
Marketable Securities	4,722,215	4,715,238
Fair Value, Inputs, Level 2 | Corporate Bond Securities
Marketable Securities	$ 39,575,959	$ 35,280,978