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 (in shares) at Apr. 30, 2018	66,196,854		1,453,537
Balance at Apr. 30, 2018	$ 662	$ 14,231	$ (951)	$ 10,060	$ 24,002	$ 5,264	$ 29,266
Stock repurchase (in shares)			506,132
Stock repurchase			$ (150)		(150)		(150)
BHCMC distribution noncontrolling interest						(360)	(360)
Net Income				2,230	2,230	1,149	3,379
Balance (in shares) at Oct. 31, 2018	66,196,854		1,959,669
Balance at Oct. 31, 2018	$ 662	14,231	$ (1,101)	12,290	26,082	6,053	32,135
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
Stock repurchase (in shares)			326,871
Stock repurchase			$ (138)		(138)		(138)
Net Income				4,291	4,291	215	4,506
Deferred compensation, restricted stock		95			95		95
Balance (in shares) at Oct. 31, 2019	71,008,122		3,053,922
Balance at Oct. 31, 2019	$ 710	$ 14,862	$ (1,525)	$ 18,204	$ 32,251	$ 6,556	$ 38,807