Schedule of Unrealized Loss Breakdown by Investment Type (Details) - USD ($)	Apr. 30, 2024	Apr. 30, 2023
Marketable Securities [Line Items]
Debt securities, unrealized loss, less than 12 months	$ 8,152,000	$ 3,952,000
Debt securities, unrealized loss, less than 12 months, accumulated loss	(92,000)	(155,000)
Debt securities, unrealized loss, 12 months or greater	1,605,000	6,013,000
Debt securities, unrealized loss, 12 months or greater, accumulated loss	(225,000)	(598,000)
Debt securities, unrealized loss fair value	9,757,000	9,965,000
Debt securities, unrealized loss fair value, accumulated loss	(317,000)	(753,000)
Municipal Bonds [Member]
Marketable Securities [Line Items]
Debt securities, unrealized loss, less than 12 months	5,897,000	868,000
Debt securities, unrealized loss, less than 12 months, accumulated loss	(20,000)	(6,000)
Debt securities, unrealized loss, 12 months or greater	773,000	3,769,000
Debt securities, unrealized loss, 12 months or greater, accumulated loss	(80,000)	(224,000)
Debt securities, unrealized loss fair value	6,670,000	4,637,000
Debt securities, unrealized loss fair value, accumulated loss	(100,000)	(230,000)
Real Estate Investment [Member]
Marketable Securities [Line Items]
Debt securities, unrealized loss, less than 12 months		36,000
Debt securities, unrealized loss, less than 12 months, accumulated loss		(9,000)
Debt securities, unrealized loss, 12 months or greater	66,000	35,000
Debt securities, unrealized loss, 12 months or greater, accumulated loss	(8,000)	(13,000)
Debt securities, unrealized loss fair value	66,000	71,000
Debt securities, unrealized loss fair value, accumulated loss	(8,000)	(22,000)
Equity Securities [Member]
Marketable Securities [Line Items]
Debt securities, unrealized loss, less than 12 months	2,255,000	3,048,000
Debt securities, unrealized loss, less than 12 months, accumulated loss	(72,000)	(140,000)
Debt securities, unrealized loss, 12 months or greater	766,000	2,209,000
Debt securities, unrealized loss, 12 months or greater, accumulated loss	(137,000)	(361,000)
Debt securities, unrealized loss fair value	3,021,000	5,257,000
Debt securities, unrealized loss fair value, accumulated loss	$ (209,000)	$ (501,000)