Schedule of Investments (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jul. 31, 2024	Apr. 30, 2024
Marketable Securities [Line Items]
Cost Basis	$ 25,892,000	$ 25,474,000
Gross Unrealized Gains	10,842,000	9,331,000
Gross Unrealized Losses	(235,000)	(317,000)
Fair Value	36,499,000	34,488,000
Municipal Bonds [Member]
Marketable Securities [Line Items]
Cost Basis	7,332,000	7,057,000
Gross Unrealized Gains	189,000	28,000
Gross Unrealized Losses	(81,000)	(100,000)
Fair Value	7,440,000	6,985,000
Real Estate Investment [Member]
Marketable Securities [Line Items]
Cost Basis	74,000	74,000
Gross Unrealized Gains	1,000
Gross Unrealized Losses	(6,000)	(8,000)
Fair Value	69,000	66,000
Equity Securities [Member]
Marketable Securities [Line Items]
Cost Basis	17,278,000	17,408,000
Gross Unrealized Gains	10,652,000	9,303,000
Gross Unrealized Losses	(148,000)	(209,000)
Fair Value	27,782,000	26,502,000
Money Markets and CDs [Member]
Marketable Securities [Line Items]
Cost Basis	1,208,000	935,000
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	$ 1,208,000	$ 935,000