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, 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)			120,821				120,821	[1]
Stock repurchase			$ (43)		(43)		$ (43)
Deferred compensation, restricted stock		47			47		47
Net Income (loss)				2,061	2,061	130	2,191
Balance (in shares) at Jul. 31, 2019	71,008,122		2,847,872
Balance at Jul. 31, 2019	$ 710	14,814	$ (1,430)	15,974	30,068	6,471	36,539
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
Stock repurchase (in shares)			212,000				212,000	[1]
Stock repurchase			$ (108)		(108)		$ (108)
Deferred compensation, restricted stock		150			150		150
Net Income (loss)				(15)	(15)	(439)	(454)
Balance (in shares) at Jul. 31, 2020	77,719,677		3,533,415
Balance at Jul. 31, 2020	$ 777	$ 15,750	$ (1,821)	$ 18,132	$ 32,838	$ 4,554	$ 37,392

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