Consolidated Condensed Statement of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Apr. 30, 2022	10,000,000		(490,157)
Balance at Apr. 30, 2022	$ 1,000	$ 991	$ (9,967)	$ 87,645	$ (24)	$ 79,645
Net income				4,458		4,458
Change in unrealized gains on Fixed Income securities, net of taxes					5	5
Purchase of treasury stock (in shares)			(35,029)
Purchase of treasury stock			$ (2,382)			(2,382)
Dividends declared				(2,369)		(2,369)
Balance (in shares) at Jul. 31, 2022	10,000,000		(525,186)
Balance at Jul. 31, 2022	$ 1,000	991	$ (12,349)	89,734	(19)	79,357
Balance (in shares) at Apr. 30, 2022	10,000,000		(490,157)
Balance at Apr. 30, 2022	$ 1,000	991	$ (9,967)	87,645	(24)	79,645
Net income						14,036
Change in unrealized gains on Fixed Income securities, net of taxes						125
Balance (in shares) at Jan. 31, 2023	10,000,000		(561,138)
Balance at Jan. 31, 2023	$ 1,000	991	$ (14,454)	94,588	101	82,226
Balance (in shares) at Apr. 30, 2022	10,000,000		(490,157)
Balance at Apr. 30, 2022	$ 1,000	991	$ (9,967)	87,645	(24)	79,645
Balance (in shares) at Apr. 30, 2023	10,000,000		(565,460)
Balance at Apr. 30, 2023	$ 1,000	991	$ (14,671)	95,979	374	83,673
Balance (in shares) at Jul. 31, 2022	10,000,000		(525,186)
Balance at Jul. 31, 2022	$ 1,000	991	$ (12,349)	89,734	(19)	79,357
Net income				4,330		4,330
Change in unrealized gains on Fixed Income securities, net of taxes					(3)	(3)
Purchase of treasury stock (in shares)			(17,314)
Purchase of treasury stock			$ (1,100)			(1,100)
Dividends declared				(2,364)		(2,364)
Balance (in shares) at Oct. 31, 2022	10,000,000		(542,500)
Balance at Oct. 31, 2022	$ 1,000	991	$ (13,449)	91,700	(22)	80,220
Net income				5,248		5,248
Change in unrealized gains on Fixed Income securities, net of taxes					123	123
Purchase of treasury stock (in shares)			(18,638)
Purchase of treasury stock			$ (1,005)			(1,005)
Dividends declared				(2,360)		(2,360)
Balance (in shares) at Jan. 31, 2023	10,000,000		(561,138)
Balance at Jan. 31, 2023	$ 1,000	991	$ (14,454)	94,588	101	82,226
Balance (in shares) at Apr. 30, 2023	10,000,000		(565,460)
Balance at Apr. 30, 2023	$ 1,000	991	$ (14,671)	95,979	374	83,673
Net income				4,859		4,859
Change in unrealized gains on Fixed Income securities, net of taxes					(212)	(212)
Purchase of treasury stock (in shares)			(4,011)
Purchase of treasury stock			$ (188)			(188)
Dividends declared				(2,641)		(2,641)
Balance (in shares) at Jul. 31, 2023	10,000,000		(569,471)
Balance at Jul. 31, 2023	$ 1,000	991	$ (14,859)	98,197	162	85,491
Balance (in shares) at Apr. 30, 2023	10,000,000		(565,460)
Balance at Apr. 30, 2023	$ 1,000	991	$ (14,671)	95,979	374	83,673
Net income						14,232
Change in unrealized gains on Fixed Income securities, net of taxes						(402)
Balance (in shares) at Jan. 31, 2024	10,000,000		(573,017)
Balance at Jan. 31, 2024	$ 1,000	991	$ (15,009)	102,292	(28)	89,246
Balance (in shares) at Jul. 31, 2023	10,000,000		(569,471)
Balance at Jul. 31, 2023	$ 1,000	991	$ (14,859)	98,197	162	85,491
Net income				3,488		3,488
Change in unrealized gains on Fixed Income securities, net of taxes					(448)	(448)
Purchase of treasury stock (in shares)			(3,546)
Purchase of treasury stock			$ (150)			(150)
Dividends declared				(2,639)		(2,639)
Balance (in shares) at Oct. 31, 2023	10,000,000		(573,017)
Balance at Oct. 31, 2023	$ 1,000	991	$ (15,009)	99,046	(286)	85,742
Net income				5,885		5,885
Change in unrealized gains on Fixed Income securities, net of taxes					258	258
Dividends declared				(2,639)		(2,639)
Balance (in shares) at Jan. 31, 2024	10,000,000		(573,017)
Balance at Jan. 31, 2024	$ 1,000	$ 991	$ (15,009)	$ 102,292	$ (28)	$ 89,246