Statements of Stockholders' Equity (Unaudited) - USD ($)	Preferred Stock [Member]	Common Stock Class A [Member]	Additional Paid-in Capital [Member]	Treasury Stock Common ClassA (Member)	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance at Apr. 30, 2023	$ 99,000	$ 850,000	$ 1,934,000	$ (4,554,000)	$ (161,000)	$ 52,481,000	$ 50,649,000
Balance, shares at Apr. 30, 2023	4,100	8,502,881		3,572,338
Purchases of common stock				$ (22,000)			(22,000)
Purchases of common stock, shares				2,035
Unrealized gain, net of tax effect					(23,000)		(23,000)
Net Income						2,374,000	2,374,000
Balance at Jul. 31, 2023	$ 99,000	$ 850,000	1,934,000	$ (4,576,000)	(184,000)	54,855,000	52,978,000
Balance, shares at Jul. 31, 2023	4,100	8,502,881		3,574,373
Balance at Apr. 30, 2024	$ 99,000	$ 850,000	1,934,000	$ (4,945,000)	(137,000)	56,836,000	54,637,000
Balance, shares at Apr. 30, 2024	4,100	8,502,881		3,606,151
Unrealized gain, net of tax effect					177,000		177,000
Net Income						2,705,000	2,705,000
Balance at Jul. 31, 2024	$ 99,000	$ 850,000	$ 1,934,000	$ (4,945,000)	$ 40,000	$ 59,541,000	$ 57,519,000
Balance, shares at Jul. 31, 2024	4,100	8,502,881		3,606,151