Schedule of Investments (Details) - USD ($)	9 Months Ended	12 Months Ended
	Jan. 31, 2025	Apr. 30, 2024
Marketable Securities [Line Items]
Cost Basis	$ 26,498,000	$ 25,474,000
Gross Unrealized Gains	10,911,000	9,331,000
Gross Unrealized Losses	(259,000)	(317,000)
Fair Value	37,150,000	34,488,000
Municipal Bonds [Member]
Marketable Securities [Line Items]
Cost Basis	7,532,000	7,057,000
Gross Unrealized Gains	114,000	28,000
Gross Unrealized Losses	(79,000)	(100,000)
Fair Value	7,567,000	6,985,000
Real Estate Investment [Member]
Marketable Securities [Line Items]
Cost Basis	73,000	74,000
Gross Unrealized Gains	4,000
Gross Unrealized Losses	(6,000)	(8,000)
Fair Value	71,000	66,000
Equity Securities [Member]
Marketable Securities [Line Items]
Cost Basis	17,664,000	17,408,000
Gross Unrealized Gains	10,793,000	9,303,000
Gross Unrealized Losses	(174,000)	(209,000)
Fair Value	28,283,000	26,502,000
Money Markets and CDs [Member]
Marketable Securities [Line Items]
Cost Basis	1,229,000	935,000
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	$ 1,229,000	$ 935,000