Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]
BALANCE at Jul. 31, 2020	$ 71,139	$ 33	$ 260	$ 277,443	$ (56,221)	$ (7,410)	$ (139,333)	$ (3,633)
Exercise of stock options	686			686
Restricted Class B common stock purchased from employees	(1,343)				(1,343)
Repurchases of Class B common stock through repurchase program	(2,849)				(2,849)
Grant of restricted equity in subsidiary				(2,195)				2,195
Stock-based compensation	1,215		3	1,212
Distributions to noncontrolling interests	(646)							(646)
Other comprehensive loss	(980)					(980)
Net income	58,018						57,744	274
BALANCE at Apr. 30, 2021	127,160	33	263	277,125	(60,413)	(8,390)	(81,589)	131
Business acquisition	1,920			(21)				1,941
BALANCE at Jan. 31, 2021	90,416	33	263	276,871	(60,413)	(8,957)	(117,937)	556
Stock-based compensation	275			275
Distributions to noncontrolling interests	(228)							(228)
Other comprehensive loss	567					567
Net income	36,398						36,348	50
BALANCE at Apr. 30, 2021	127,160	33	263	277,125	(60,413)	(8,390)	(81,589)	131
Business acquisition	(268)			(21)				(247)
BALANCE at Jul. 31, 2021	166,614	33	264	278,021	(60,413)	(10,183)	(42,858)	1,750
Exercise of stock options by Howard S. Jonas	(3,858)		10	14,920	(18,788)
Exercise of stock options	137			137
Restricted Class B common stock purchased from employees	(8,974)				(8,974)
Business acquisition	1,000			1,000
Stock-based compensation	1,840		3	1,837
Distributions to noncontrolling interests	(359)							(359)
Other comprehensive loss	(1,158)					(1,158)
Net income	10,918						9,786	1,132
BALANCE at Apr. 30, 2022	166,160	33	277	295,915	(88,175)	(11,341)	(33,072)	2,523
BALANCE at Jan. 31, 2022	162,980	33	267	278,613	(69,387)	(11,088)	(37,843)	2,385
Exercise of stock options by Howard S. Jonas	(3,858)		10	14,920	(18,788)
Exercise of stock options	137			137
Business acquisition	1,000			1,000
Stock-based compensation	1,245			1,245
Distributions to noncontrolling interests	(161)							(161)
Other comprehensive loss	(253)					(253)
Net income	5,070						4,771	299
BALANCE at Apr. 30, 2022	$ 166,160	$ 33	$ 277	$ 295,915	$ (88,175)	$ (11,341)	$ (33,072)	$ 2,523