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)			25,277				25,277	[1]
Stock repurchase			$ (6)		(6)		$ (6)
Net Income				509	509	413	922
Balance (in shares) at Jul. 31, 2018	66,196,854		1,478,814
Balance at Jul. 31, 2018	$ 662	14,231	$ (957)	10,569	24,505	5,677	30,182
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)
Net Income				2,061	2,061	130	2,191
Deferred compensation, restricted stock		47			47		47
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

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