Schedule of Investments (Details) - USD ($)	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Marketable Securities [Line Items]
Cost Basis	$ 25,474,000	$ 25,154,000
Gross Unrealized Gains	9,331,000	6,962,000
Gross Unrealized Losses	(317,000)	(753,000)
Fair Value	34,488,000	31,363,000
Municipal Bonds [Member]
Marketable Securities [Line Items]
Cost Basis	7,057,000	5,396,000
Gross Unrealized Gains	28,000	46,000
Gross Unrealized Losses	(100,000)	(230,000)
Fair Value	6,985,000	5,212,000
Real Estate Investment [Member]
Marketable Securities [Line Items]
Cost Basis	74,000	93,000
Gross Unrealized Gains
Gross Unrealized Losses	(8,000)	(22,000)
Fair Value	66,000	71,000
Equity Securities [Member]
Marketable Securities [Line Items]
Cost Basis	17,408,000	18,605,000
Gross Unrealized Gains	9,303,000	6,915,000
Gross Unrealized Losses	(209,000)	(501,000)
Fair Value	26,502,000	25,019,000
Money Markets and CDs [Member]
Marketable Securities [Line Items]
Cost Basis	935,000	1,060,000
Gross Unrealized Gains		1,000
Gross Unrealized Losses
Fair Value	$ 935,000	$ 1,061,000