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, 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
Deferred compensation, restricted stock		0	148	0	0	148	0	148
Net Income		$ 0	0	$ 0	2,906	2,906	1,872	$ 4,778
Stock repurchase (in shares)	[1]							0
Balance (in shares) at Jul. 31, 2021		79,070,382		3,703,633
Balance at Jul. 31, 2021		$ 790	17,048	$ (1,909)	22,486	38,415	7,890	$ 46,305
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
Deferred compensation, restricted stock		0	132	0	0	132	0	132
Net Income		$ 0	0	$ 0	431	431	0	$ 431
Stock repurchase (in shares)		0		1,639				1,639	[1]
Stock repurchase		$ 0	0	$ (2)	0	(2)	0	$ (2)
Stock awarded to Director (in shares)		400,000		0
Stock awarded to Director		$ 4	348	$ 0	0	352	0	352
Balance (in shares) at Jul. 31, 2022		80,673,572		3,892,065
Balance at Jul. 31, 2022		$ 807	$ 12,640	$ (2,079)	$ 30,379	$ 41,747	$ 0	$ 41,747

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