Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands		Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	Retained Earnings [Member]	Parent [Member]	Total
Balance (in shares) at Apr. 30, 2022		80,348,572		3,890,426
Balance at Apr. 30, 2022		$ 803	$ 12,160	$ (2,077)	$ 29,948	$ 40,834
Deferred compensation, restricted stock (in shares)		(75,000)		0
Deferred compensation, restricted stock		$ 0	132	$ 0	0	132
Stock repurchase (in shares)		0		1,639			1,639	[1]
Stock repurchase		$ 0	0	$ (2)	0	(2)
Stock awarded to Director (in shares)		400,000		0
Stock awarded to Director		$ 4	348	$ 0	0	352
Net Income		$ 0	0	$ 0	431	431
Balance (in shares) at Jul. 31, 2022		80,673,572		3,892,065
Balance at Jul. 31, 2022		$ 807	12,640	$ (2,079)	30,379	41,747
Balance (in shares) at Apr. 30, 2022		80,348,572		3,890,426
Balance at Apr. 30, 2022		$ 803	12,160	$ (2,077)	29,948	40,834
Net Income							$ 5,091
Balance (in shares) at Jan. 31, 2023		79,873,572		3,977,522
Balance at Jan. 31, 2023		$ 799	12,745	$ (2,137)	35,039	46,446
Balance (in shares) at Jul. 31, 2022		80,673,572		3,892,065
Balance at Jul. 31, 2022		$ 807	12,640	$ (2,079)	30,379	41,747
Deferred compensation, restricted stock (in shares)		0		0
Deferred compensation, restricted stock		$ 0	146	$ 0	0	146
Stock repurchase (in shares)		0		150			150	[1]
Stock repurchase		$ 0	0	$ 0	0	0
Net Income		$ 0	0	$ 0	2,683	2,683
Balance (in shares) at Oct. 31, 2022		80,673,572		3,892,215
Balance at Oct. 31, 2022		$ 807	12,786	$ (2,079)	33,062	44,576
Deferred compensation, restricted stock (in shares)		(800,000)		0
Deferred compensation, restricted stock		$ (8)	(41)	$ 0	0	(49)
Stock repurchase (in shares)		0		85,307			85,307	[1]
Stock repurchase		$ 0	0	$ (58)	0	(58)
Net Income		$ 0	0	$ 0	1,977	1,977	$ 1,977
Balance (in shares) at Jan. 31, 2023		79,873,572		3,977,522
Balance at Jan. 31, 2023		$ 799	12,745	$ (2,137)	35,039	46,446
Stock repurchase (in shares)	[1]						2,000
Balance (in shares) at Apr. 30, 2023		80,871,211		3,979,522
Balance at Apr. 30, 2023		$ 808	13,647	$ (2,138)	34,464	46,781	$ 46,781
Deferred compensation, restricted stock (in shares)		(1,300,000)		0
Deferred compensation, restricted stock		$ (13)	(236)	$ 0	0	(249)
Stock repurchase (in shares)		0		6,863,789			6,863,789	[1]
Stock repurchase		$ 0	0	$ (5,035)	0	(5,035)
Net Income		$ 0	0	$ 0	719	719
Balance (in shares) at Jul. 31, 2023		79,571,211		10,843,311
Balance at Jul. 31, 2023		$ 795	13,411	$ (7,173)	35,183	42,216
Balance (in shares) at Apr. 30, 2023		80,871,211		3,979,522
Balance at Apr. 30, 2023		$ 808	13,647	$ (2,138)	34,464	46,781	$ 46,781
Net Income							8,052
Balance (in shares) at Jan. 31, 2024		79,721,211		10,870,355
Balance at Jan. 31, 2024		$ 797	13,791	$ (7,192)	42,516	49,912	$ 49,912
Balance (in shares) at Jul. 31, 2023		79,571,211		10,843,311
Balance at Jul. 31, 2023		$ 795	13,411	$ (7,173)	35,183	42,216
Deferred compensation, restricted stock (in shares)		0		0
Deferred compensation, restricted stock		$ 0	104	$ 0	0	104
Stock repurchase (in shares)		0		2,300			2,300	[1]
Stock repurchase		$ 0	0	$ (1)	0	(1)
Stock awarded to Director (in shares)		300,000		0
Stock awarded to Director		$ 3	219	$ 0	0	222
Net Income		$ 0	0	$ 0	4,951	4,951
Balance (in shares) at Oct. 31, 2023		79,871,211		10,845,611
Balance at Oct. 31, 2023		$ 798	13,734	$ (7,174)	40,134	47,492
Deferred compensation, restricted stock (in shares)		(150,000)		0
Deferred compensation, restricted stock		$ (1)	57	$ 0	0	56
Stock repurchase (in shares)		0		24,744
Stock repurchase		$ 0	0	$ (18)	0	(18)
Net Income		$ 0	0	$ 0	2,382	2,382	$ 2,382
Balance (in shares) at Jan. 31, 2024		79,721,211		10,870,355
Balance at Jan. 31, 2024		$ 797	$ 13,791	$ (7,192)	$ 42,516	$ 49,912	$ 49,912

[1] These shares of common stock were purchased through a private transaction