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, 2023		80,871,211
Balance at Apr. 30, 2023		$ 808	$ 13,647	$ (2,138)	$ 34,464	$ 46,781
Balance (in shares) at Apr. 30, 2023				3,979,522
Stock repurchase (in shares)		0		6,863,789			6,863,789	[1]
Stock repurchase		$ 0	0	$ (5,035)	0	(5,035)
Deferred compensation, restricted stock (in shares)		(1,300,000)		0
Deferred compensation, restricted stock		$ (13)	(236)	$ 0	0	(249)
Net Income		$ 0	0	0	719	719
Balance (in shares) at Jul. 31, 2023		79,571,211
Balance at Jul. 31, 2023		$ 795	13,411	$ (7,173)	35,183	42,216
Balance (in shares) at Jul. 31, 2023				10,843,311
Balance (in shares) at Apr. 30, 2023		80,871,211
Balance at Apr. 30, 2023		$ 808	13,647	$ (2,138)	34,464	46,781
Balance (in shares) at Apr. 30, 2023				3,979,522
Net Income							$ 8,052
Balance (in shares) at Jan. 31, 2024		79,721,211
Balance at Jan. 31, 2024		$ 797	13,791	$ (7,192)	42,516	49,912
Balance (in shares) at Jan. 31, 2024				10,870,355
Balance (in shares) at Jul. 31, 2023		79,571,211
Balance at Jul. 31, 2023		$ 795	13,411	$ (7,173)	35,183	42,216
Balance (in shares) at Jul. 31, 2023				10,843,311
Stock repurchase (in shares)		0		2,300			2,300	[1]
Stock repurchase		$ 0	0	$ (1)	0	(1)
Deferred compensation, restricted stock (in shares)		0		0
Deferred compensation, restricted stock		$ 0	104	$ 0	0	104
Net Income		$ 0	0	$ 0	4,951	4,951
Stock awarded to director (in shares)		300,000		0
Stock awarded to director		$ 3	219	$ 0	0	222
Balance (in shares) at Oct. 31, 2023		79,871,211
Balance at Oct. 31, 2023		$ 798	13,734	$ (7,174)	40,134	47,492
Balance (in shares) at Oct. 31, 2023				10,845,611
Stock repurchase (in shares)		0		24,744			24,744	[1]
Stock repurchase		$ 0	0	$ (18)	0	(18)
Deferred compensation, restricted stock (in shares)		(150,000)		0
Deferred compensation, restricted stock		$ (1)	57	$ 0	0	56
Net Income		$ 0	0	0	2,382	2,382	$ 2,382
Balance (in shares) at Jan. 31, 2024		79,721,211
Balance at Jan. 31, 2024		$ 797	13,791	$ (7,192)	42,516	49,912
Balance (in shares) at Jan. 31, 2024				10,870,355
Stock repurchase (in shares)	[1]						5,000
Balance (in shares) at Apr. 30, 2024		79,646,211					68,770,856
Balance at Apr. 30, 2024		$ 796	13,866	$ (7,197)	46,976	54,441
Balance (in shares) at Apr. 30, 2024				10,875,355			10,875,355
Stock repurchase (in shares)				500,000			500,000	[1]
Stock repurchase		$ 0	0	$ (464)	0	(464)
Deferred compensation, restricted stock (in shares)		0		0
Deferred compensation, restricted stock		$ 0	69	$ 0	0	69
Net Income		$ 0	0	0	2,246	2,246
Balance (in shares) at Jul. 31, 2024		79,646,211
Balance at Jul. 31, 2024		$ 796	13,935	$ (7,661)	49,222	56,292
Balance (in shares) at Jul. 31, 2024				11,375,355
Balance (in shares) at Apr. 30, 2024		79,646,211					68,770,856
Balance at Apr. 30, 2024		$ 796	13,866	$ (7,197)	46,976	54,441
Balance (in shares) at Apr. 30, 2024				10,875,355			10,875,355
Net Income							$ 9,220
Balance (in shares) at Jan. 31, 2025		79,732,915					67,602,396
Balance at Jan. 31, 2025		$ 796	14,072	$ (8,693)	56,196	62,371
Balance (in shares) at Jan. 31, 2025				12,130,519			12,130,519
Balance (in shares) at Jul. 31, 2024		79,646,211
Balance at Jul. 31, 2024		$ 796	13,935	$ (7,661)	49,222	56,292
Balance (in shares) at Jul. 31, 2024				11,375,355
Stock repurchase (in shares)		0		683,760			683,760	[1]
Stock repurchase		$ 0	0	$ (899)	0	(899)
Deferred compensation, restricted stock (in shares)		0		0
Deferred compensation, restricted stock		$ 0	68	$ 0	0	68
Net Income		$ 0	0	0	3,596	3,596
Balance (in shares) at Oct. 31, 2024		79,646,211
Balance at Oct. 31, 2024		$ 796	14,003	$ (8,560)	52,818	59,057
Balance (in shares) at Oct. 31, 2024				12,059,115
Stock repurchase (in shares)		0		71,404
Stock repurchase		$ 0	0	$ (133)	0	(133)
Deferred compensation, restricted stock (in shares)				0
Deferred compensation, restricted stock		0	69	$ 0	0	69
Net Income		$ 0	0	0	3,378	3,378	$ 3,378
Deferred compensation, restricted stock (in shares)		86,704
Balance (in shares) at Jan. 31, 2025		79,732,915					67,602,396
Balance at Jan. 31, 2025		$ 796	$ 14,072	$ (8,693)	$ 56,196	$ 62,371
Balance (in shares) at Jan. 31, 2025				12,130,519			12,130,519

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