Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands		Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance, January 31, 2023 (in shares)		79,070,382		3,703,633
Balance (in shares) at Apr. 30, 2021		79,070,382		3,703,633
Balance at Apr. 30, 2021		$ 790	$ 16,900	$ (1,909)	$ 19,580	$ 35,361	$ 6,018	$ 41,379
Deferred compensation, restricted stock		0	148	0	0	148	0	148
Net Income		0	0	0	2,906	2,906	1,872	4,778
Net Income		$ 0	0	$ 0	2,906	2,906	1,872	4,778
Balance (in shares) at Jul. 31, 2021		79,070,382		3,703,633
Balance at Jul. 31, 2021		$ 790	17,048	$ (1,909)	22,486	38,415	7,890	46,305
Balance (in shares) at Apr. 30, 2021		79,070,382		3,703,633
Balance at Apr. 30, 2021		$ 790	16,900	$ (1,909)	19,580	35,361	6,018	41,379
Net Income								10,612
Net Income								10,612
Balance (in shares) at Jan. 31, 2022		79,020,382		3,709,923
Balance at Jan. 31, 2022		$ 790	11,218	$ (1,913)	28,320	38,415	0	38,415
Balance, January 31, 2023 (in shares)		79,070,382		3,703,633
Balance (in shares) at Jul. 31, 2021		79,070,382		3,703,633
Balance at Jul. 31, 2021		$ 790	17,048	$ (1,909)	22,486	38,415	7,890	46,305
Deferred compensation, restricted stock		0	149	0	0	149	0	149
Net Income		0	0	0	3,150	3,150	0	3,150
Purchase of noncontrolling interest in BHCMC, LLC		$ 0	(6,119)	$ 0	0	(6,119)	(7,890)	$ (14,009)
Stock repurchase (in shares)		0		6,290				6,290	[1]
Stock repurchase		$ 0	0	$ (4)	0	(4)	0	$ (4)
Net Income		$ 0	0	$ 0	3,150	3,150	0	3,150
Balance (in shares) at Oct. 31, 2021		79,070,382		3,709,923
Balance at Oct. 31, 2021		$ 790	11,078	$ (1,913)	25,636	35,591	0	35,591
Stock repurchase		$ (0)	(0)	$ 4	(0)	4	(0)	4
Balance (in shares) at Jul. 31, 2021		79,070,382		3,703,633
Balance at Jul. 31, 2021		$ 790	17,048	$ (1,909)	22,486	38,415	7,890	$ 46,305
Stock repurchase (in shares)								3,377,522
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	0	$ 46,446
Balance, January 31, 2023 (in shares)		79,070,382		3,709,923
Balance (in shares) at Oct. 31, 2021		79,070,382		3,709,923
Balance at Oct. 31, 2021		$ 790	11,078	$ (1,913)	25,636	35,591	0	35,591
Deferred compensation, restricted stock		0	140	0	0	140	0	140
Net Income		$ 0	0	$ 0	2,684	2,684	0	$ 2,684
Stock repurchase (in shares)	[1]							0
Deferred compensation, restricted stock (in shares)		(50,000)		0
Net Income		$ 0	0	$ 0	2,684	2,684	0	$ 2,684
Balance (in shares) at Jan. 31, 2022		79,020,382		3,709,923
Balance at Jan. 31, 2022		$ 790	11,218	$ (1,913)	28,320	38,415	0	$ 38,415
Balance, January 31, 2023 (in shares)		79,020,382		3,709,923
Stock repurchase (in shares)	[1]							180,503
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	0	$ 40,834
Balance, January 31, 2023 (in shares)		80,348,572		3,890,426
Deferred compensation, restricted stock		$ 0	132	$ 0	0	132	0	132
Net Income		$ 0	0	$ 0	431	431	0	$ 431
Stock repurchase (in shares)		0		1,639				1,639	[1]
Stock repurchase		$ 0	0	$ (2)	0	(2)	0	$ (2)
Deferred compensation, restricted stock (in shares)		(75,000)		0
Net Income		$ 0	0	$ 0	431	431	0	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	0	41,747
Stock awarded to Director (in shares)		400,000		0
Stock awarded to Director		$ 4	348	$ 0	0	352	0	352
Stock repurchase		$ (0)	(0)	$ 2	(0)	2	(0)	2
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	0	40,834
Net Income								5,091
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	0	46,446
Balance, January 31, 2023 (in shares)		80,673,572		3,892,065
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	0	41,747
Deferred compensation, restricted stock		0	146	0	0	146	0	146
Net Income		$ 0	0	$ 0	2,683	2,683	0	$ 2,683
Stock repurchase (in shares)		0		150				150	[1]
Stock repurchase		$ 0	0	$ 0	0	0	0	$ 0
Net Income		$ 0	0	$ 0	2,683	2,683	0	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	0	44,576
Stock repurchase		$ 0	0	$ 0	0	0	0	0
Balance, January 31, 2023 (in shares)		80,673,572		3,892,215
Deferred compensation, restricted stock		$ (8)	(41)	$ 0	0	(49)	0	(49)
Net Income		$ 0	0	$ 0	1,977	1,977	0	$ 1,977
Stock repurchase (in shares)		0		85,307				85,307
Stock repurchase		$ 0	0	$ (58)	0	(58)	0	$ (58)
Deferred compensation, restricted stock (in shares)		(800,000)		0
Net Income		$ 0	0	$ 0	1,977	1,977	0	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	0	46,446
Stock repurchase		$ (0)	$ (0)	$ 58	$ (0)	$ 58	$ (0)	$ 58
Balance, January 31, 2023 (in shares)		79,873,572		3,977,522

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