Consolidated Condensed Statement of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands		Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Apr. 30, 2020		10,000,000		(383,279)
Balance at Apr. 30, 2020		$ 1,000	$ 991	$ (5,957)	$ 57,374	$ 131	$ 53,539
Net income					17,228		17,228
Change in unrealized gains on Fixed Income securities, net of taxes						(105)	(105)
Purchase of treasury stock (in shares)				(37,081)
Purchase of treasury stock				$ (1,045)			(1,045)
Dividends declared	[1]				(6,048)		(6,048)
Balance (in shares) at Jan. 31, 2021		10,000,000		(420,360)
Balance at Jan. 31, 2021		$ 1,000	991	$ (7,002)	68,554	26	63,569
Balance (in shares) at Apr. 30, 2020		10,000,000		(383,279)
Balance at Apr. 30, 2020		$ 1,000	991	$ (5,957)	57,374	131	53,539
Balance (in shares) at Apr. 30, 2021		10,000,000		(436,830)
Balance at Apr. 30, 2021		$ 1,000	991	$ (7,483)	72,502	3	67,013
Balance (in shares) at Oct. 31, 2020		10,000,000		(398,949)
Balance at Oct. 31, 2020		$ 1,000	991	$ (6,379)	63,531	85	59,228
Net income					7,035		7,035
Change in unrealized gains on Fixed Income securities, net of taxes						(59)	(59)
Purchase of treasury stock (in shares)				(21,411)
Purchase of treasury stock				$ (623)			(623)
Dividends declared	[1]				(2,012)		(2,012)
Balance (in shares) at Jan. 31, 2021		10,000,000		(420,360)
Balance at Jan. 31, 2021		$ 1,000	991	$ (7,002)	68,554	26	63,569
Balance (in shares) at Oct. 31, 2020		10,000,000		(398,949)
Balance at Oct. 31, 2020		$ 1,000	991	$ (6,379)	63,531	85	59,228
Net income							5,614
Change in unrealized gains on Fixed Income securities, net of taxes							0
Balance (in shares) at Jan. 31, 2022		10,000,000		(470,837)
Balance at Jan. 31, 2022		$ 1,000	991	$ (8,805)	86,216	(1)	79,401
Balance (in shares) at Apr. 30, 2021		10,000,000		(436,830)
Balance at Apr. 30, 2021		$ 1,000	991	$ (7,483)	72,502	3	67,013
Net income					20,015		20,015
Change in unrealized gains on Fixed Income securities, net of taxes						(4)	(4)
Purchase of treasury stock (in shares)				(34,007)
Purchase of treasury stock				$ (1,322)			(1,322)
Dividends declared	[1]				(6,301)		(6,301)
Balance (in shares) at Jan. 31, 2022		10,000,000		(470,837)
Balance at Jan. 31, 2022		$ 1,000	991	$ (8,805)	86,216	(1)	79,401
Balance (in shares) at Oct. 31, 2021		10,000,000		(453,419)
Balance at Oct. 31, 2021		$ 1,000	991	$ (8,000)	82,700	(1)	76,690
Net income					5,614		5,614
Change in unrealized gains on Fixed Income securities, net of taxes						0	$ 0
Purchase of treasury stock (in shares)				(17,418)			(17,418)
Purchase of treasury stock				$ (805)			$ (805)
Dividends declared	[1]				(2,098)		(2,098)
Balance (in shares) at Jan. 31, 2022		10,000,000		(470,837)
Balance at Jan. 31, 2022		$ 1,000	$ 991	$ (8,805)	$ 86,216	$ (1)	$ 79,401

[1] Dividends declared per common share were $0.22 for the three months ending July 31, 2021.