Condensed Statements of Stockholders' Equity (Unaudited) - USD ($)	Preferred Stock [Member]	Common Stock Class A [Member]	Additional Paid-in Capital [Member]	Treasury Stock Common Class A (Member)	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balances 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				$ (364,000)			(364,000)
Purchases of common stock, shares				31,713
Unrealized (loss), net of tax effect					70,000		70,000
Net Income						5,558,000	5,558,000
Dividend declared at $0.65 per common share outstanding						(3,203,000)	(3,203,000)
Balances at Jan. 31, 2024	$ 99,000	$ 850,000	1,934,000	$ (4,918,000)	(91,000)	54,836,000	52,710,000
Balance, shares at Jan. 31, 2024	4,100	8,502,881		3,604,051
Balances at Oct. 31, 2023	$ 99,000	$ 850,000	1,934,000	$ (4,595,000)	(391,000)	51,597,000	49,494,000
Balance, shares at Oct. 31, 2023	4,100	8,502,881		3,576,088
Purchases of common stock				$ (323,000)			(323,000)
Purchases of common stock, shares				27,963
Unrealized (loss), net of tax effect					300,000		300,000
Net Income						3,239,000	3,239,000
Balances at Jan. 31, 2024	$ 99,000	$ 850,000	1,934,000	$ (4,918,000)	(91,000)	54,836,000	52,710,000
Balance, shares at Jan. 31, 2024	4,100	8,502,881		3,604,051
Balances 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
Purchases of common stock				$ (32,000)			(32,000)
Purchases of common stock, shares				2,000
Unrealized (loss), net of tax effect					95,000		95,000
Net Income						6,528,000	6,528,000
Dividend declared at $0.65 per common share outstanding						(4,897,000)	(4,897,000)
Balances at Jan. 31, 2025	$ 99,000	$ 850,000	1,934,000	$ (4,977,000)	(42,000)	58,467,000	56,331,000
Balance, shares at Jan. 31, 2025	4,100	8,502,881		3,608,151
Balances at Oct. 31, 2024	$ 99,000	$ 850,000	1,934,000	$ (4,945,000)	16,000	56,860,000	54,814,000
Balance, shares at Oct. 31, 2024	4,100	8,502,881		3,606,151
Purchases of common stock				$ (32,000)			(32,000)
Purchases of common stock, shares				2,000
Unrealized (loss), net of tax effect					(58,000)		(58,000)
Net Income						1,607,000	1,607,000
Balances at Jan. 31, 2025	$ 99,000	$ 850,000	$ 1,934,000	$ (4,977,000)	$ (42,000)	$ 58,467,000	$ 56,331,000
Balance, shares at Jan. 31, 2025	4,100	8,502,881		3,608,151