Consolidated Statements of Equity - 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, Common [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)
Balance, shares at Jul. 31, 2020		3,272,000	25,961,000
Exercise of stock options	687		$ 1	686
Exercise of stock options, shares			81,000
Repurchases of Class B common stock through repurchase program	(2,849)				(2,849)
Restricted Class B common stock purchased from employees	(1,343)				(1,343)
Stock issued for matching contributions to the 401(k) Plan	1,042			1,042
Stock issued for matching contributions to the 401(k) Plan, shares			36,000
Grant of restricted equity in subsidiary				(2,361)				2,361
Business acquisition	669			(276)				945
Acquisition of interest in variable interest entity	2,509							2,509
Stock-based compensation	1,490		$ 3	1,487
Stock-based compensation, shares			301,000
Distributions to noncontrolling interests	(848)							(848)
Other comprehensive loss	(2,773)					(2,773)
Net income	96,891						96,475	416
Stock issued to certain executive officers for bonus payments
BALANCE at Jul. 31, 2021	166,614	$ 33	$ 264	278,021	(60,413)	(10,183)	(42,858)	1,750
Balance, shares at Jul. 31, 2021		3,272,000	26,379,000
Exercise of stock options	137			137
Exercise of stock options, shares			10,000
Repurchases of Class B common stock through repurchase program	(13,390)				(13,390)
Restricted Class B common stock purchased from employees	(8,974)				(8,974)
Stock-based compensation	1,930		$ 3	1,927
Stock-based compensation, shares			308,000
Distributions to noncontrolling interests	(514)							(514)
Other comprehensive loss	(1,122)					(1,122)
Net income	28,814						27,028	1,786
Exercise of stock options by Howard S. Jonas	(3,858)		$ 10	14,920	(18,788)
Exercise of stock options by Howard S. Jonas, shares			1,000,000
Business acquisition	1,000			1,000
Business acquisition, shares			28,000
Stock issued to certain executive officers for bonus payments
BALANCE at Jul. 31, 2022	170,637	$ 33	$ 277	296,005	(101,565)	(11,305)	(15,830)	3,022
Balance, shares at Jul. 31, 2022		3,272,000	27,725,000
Exercise of stock options	172			172
Exercise of stock options, shares			13,000
Repurchases of Class B common stock through repurchase program	(13,082)				(13,082)
Restricted Class B common stock purchased from employees	(814)				(814)
Stock-based compensation	4,518		$ 1	4,517
Stock-based compensation, shares			85,000
Distributions to noncontrolling interests	(348)							(348)
Other comprehensive loss	(5,887)					(5,887)
Net income	44,085						40,492	3,593
Business acquisition	100			100
Business acquisition, shares			3,051
Stock issued to certain executive officers for bonus payments	615		$ 1	614
Stock issued to certain executive officers for bonus payments, shares			25,000
BALANCE at Jul. 31, 2023	$ 199,996	$ 33	$ 279	$ 301,408	$ (115,461)	$ (17,192)	$ 24,662	$ 6,267
Balance, shares at Jul. 31, 2023		3,272,000	27,851,000