Schedule of Investments (Details) - USD ($)	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Marketable Securities [Line Items]
Cost Basis	$ 26,713,000	$ 25,474,000
Gross Unrealized Gains	9,472,000	9,331,000
Gross Unrealized Losses	(449,000)	(317,000)
Fair Value	35,736,000	34,488,000
Municipal Bonds [Member]
Marketable Securities [Line Items]
Cost Basis	7,681,000	7,057,000
Gross Unrealized Gains	141,000	28,000
Gross Unrealized Losses	(135,000)	(100,000)
Fair Value	7,687,000	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	(7,000)	(8,000)
Fair Value	68,000	66,000
Equity Securities [Member]
Marketable Securities [Line Items]
Cost Basis	17,689,000	17,408,000
Gross Unrealized Gains	9,330,000	9,303,000
Gross Unrealized Losses	(307,000)	(209,000)
Fair Value	26,712,000	26,502,000
Money Markets and CDs [Member]
Marketable Securities [Line Items]
Cost Basis	1,269,000	935,000
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	$ 1,269,000	$ 935,000