Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member] Class A Common Stock [Member]	Common Stock [Member] Class B Common Stock [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
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)
Grant of restricted equity in subsidiary				(2,195)				2,195
Business acquisition	2,188							2,188
Stock-based compensation	940		3	937
Distributions to noncontrolling interests	(418)							(418)
Other comprehensive loss	(1,547)					(1,547)
Net income	21,620						21,396	224
BALANCE at Jan. 31, 2021	90,416	33	263	276,871	(60,413)	(8,957)	(117,937)	556
BALANCE at Oct. 31, 2020	77,583	33	260	278,134	(59,077)	(7,188)	(131,045)	(3,534)
Exercise of stock options	501			501
Restricted Class B common stock purchased from employees	(1,336)				(1,336)
Grant of restricted equity in subsidiary				(2,195)				2,195
Business acquisition	2,188							2,188
Stock-based compensation	434		3	431
Distributions to noncontrolling interests	(390)							(390)
Other comprehensive loss	(1,769)					(1,769)
Net income	13,205						13,108	97
BALANCE at Jan. 31, 2021	90,416	33	263	276,871	(60,413)	(8,957)	(117,937)	556
BALANCE at Jul. 31, 2021	166,614	33	264	278,021	(60,413)	(10,183)	(42,858)	1,750
Restricted Class B common stock purchased from employees	(8,974)				(8,974)
Stock-based compensation	595		3	592
Distributions to noncontrolling interests	(198)							(198)
Other comprehensive loss	(905)					905
Net income	5,848						5,015	833
BALANCE at Jan. 31, 2022	162,980	33	267	278,613	(69,387)	(11,088)	(37,843)	2,385
BALANCE at Oct. 31, 2021	165,298	33	264	278,306	(60,439)	(9,226)	(45,330)	1,690
Restricted Class B common stock purchased from employees	(8,948)				(8,948)
Stock-based compensation	310		3	307
Distributions to noncontrolling interests	(15)							(15)
Other comprehensive loss	(1,862)					(1,862)
Net income	8,197						7,487	710
BALANCE at Jan. 31, 2022	$ 162,980	$ 33	$ 267	$ 278,613	$ (69,387)	$ (11,088)	$ (37,843)	$ 2,385