Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
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
Issuance of stock to benefit plan (in shares)	1,328,190		0				1,328,190
Issuance of stock to benefit plan	$ 13	794	$ 0	0	807	0	$ 807
Stock repurchase (in shares)	0		186,793
Stock repurchase	$ 0	0	$ (168)	0	(168)	0	(168)
Purchase of non-controlling interest in BHCMC, LLC	$ 0	(6,119)	$ 0	0	(6,119)	(7,890)	(14,009)
Deferred compensation, restricted stock (in shares)	(50,000)		0
Deferred compensation, restricted stock	$ 0	585	$ 0	0	585	0	585
Net Income	0	0	0	10,368	10,368	1,872	12,240
Deferred compensation, restricted stock	$ (0)	(585)	$ (0)	(0)	(585)	(0)	(585)
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
Issuance of stock to benefit plan (in shares)	997,639		0				997,639
Issuance of stock to benefit plan	$ 9	774	$ 0	0	783	0	$ 783
Stock repurchase (in shares)	0		89,096
Stock repurchase	$ 0	0	$ (61)	0	(61)	0	(61)
Deferred compensation, restricted stock (in shares)	(875,000)		0
Deferred compensation, restricted stock	$ 8	(365)	$ 0	0	(357)	0	(357)
Net Income	$ 0	0	$ 0	4,516	4,516	0	4,516
Stock award to director (in shares)	400,000		0
Stock award to director	$ 4	348	$ 0	0	352	0	352
Deferred compensation, restricted stock	$ (8)	365	$ 0	0	357	0	357
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	$ 0	$ 46,781