Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Apr. 30, 2019	71,008,122		2,727,051
Balance at Apr. 30, 2019	$ 710	$ 14,767	$ (1,387)	$ 13,913	$ 28,003	$ 6,341	$ 34,344
Issuance of stock benefit plan (in shares)	1,711,555						1,711,555
Issuance of stock benefit plan	$ 17	659			676		$ 676
Stock repurchase (in shares)			594,364
Stock repurchase			$ (326)		(326)		(326)
Restricted stock issued (in shares)	5,000,000
Issuance of restricted stock to employees	$ 50	1,990			2,040		2,040
Deferred compensation, restricted stock		(1,816)			(1,816)		(1,816)
BHCMC distribution noncontrolling members						(360)	(360)
Net Income				4,234	4,234	(988)	3,246
Balance (in shares) at Apr. 30, 2020	77,719,677		3,321,415
Balance at Apr. 30, 2020	$ 777	15,600	$ (1,713)	18,147	32,811	4,993	$ 37,804
Issuance of stock benefit plan (in shares)	1,400,705						1,400,705
Issuance of stock benefit plan	$ 14	707			721		$ 721
Stock repurchase (in shares)			382,218				3,103,633
Stock repurchase			$ (196)		(196)		$ (196)
Issuance of restricted stock to employees
Deferred compensation, restricted stock	(1)	593			592		592
Net Income				1,433	1,433	1,025	2,458
Deferred compensation, restricted stock (in shares)	(50,000)
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