Consolidated Statements of Equity (Unaudited) - USD ($)	Total	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Accumulated Deficit	Noncontrolling Interests	Class A Common Stock	Class B Common Stock
BALANCE at Jul. 31, 2019	$ 53,557,000	$ 273,313,000	$ (51,739,000)	$ (4,858,000)	$ (160,763,000)	$ (2,687)	$ 33,000	$ 258,000
BALANCE at Jan. 31, 2020	53,393,000	276,118,000	(52,005,000)	(6,575,000)	(161,344,000)	(3,094,000)	33,000	260,000
Exercise of stock options	276,000	276,000
Restricted Class B common stock purchased from employees	(266,000)		(266,000)
Stock-based compensation	2,531,000	2,529,000						2,000
Distributions to noncontrolling interests	(470,000)					(470,000)
Other comprehensive income (loss)	(1,717,000)			(1,717,000)
Net income (loss)	(518,000)				(581,000)	63,000
BALANCE at Oct. 31, 2019	52,331,000	274,953,000	(51,739,000)	(6,062,000)	(162,276,000)	(2,836,000)	33,000	258,000
BALANCE at Jan. 31, 2020	53,393,000	276,118,000	(52,005,000)	(6,575,000)	(161,344,000)	(3,094,000)	33,000	260,000
Restricted Class B common stock purchased from employees	(266,000)		(266,000)
Stock-based compensation	1,167,000	1,165,000						2,000
Distributions to noncontrolling interests	(230,000)					(230,000)
Other comprehensive income (loss)	(513,000)			(513,000)
Net income (loss)	904,000				932,000	(28,000)
BALANCE at Jul. 31, 2020	71,139,000	277,443,000	(56,221,000)	(7,410,000)	(139,333,000)	(3,633,000)	33,000	260,000
BALANCE at Jan. 31, 2021	90,416,000	276,871,000	(60,413,000)	(8,957,000)	(117,937,000)	556,000	33,000	263,000
Exercise of stock options	686,000	686,000
Repurchases of Class B common stock through repurchase program	(2,849,000)		(2,849,000)
Restricted Class B common stock purchased from employees	(1,343,000)		(1,343,000)
Grant of restricted equity in subsidiary (see Note 11).		(2,195,000)				2,195,000
Business acquisition	2,188,000					2,188,000
Stock-based compensation	940,000	937,000						3,000
Distributions to noncontrolling interests	(418,000)					(418,000)
Other comprehensive income (loss)	(1,547,000)			(1,547,000)
Net income (loss)	21,620,000				21,396,000	224,000
BALANCE at Oct. 31, 2020	77,583,000	278,134,000	(59,077,000)	(7,188,000)	(131,045,000)	(3,534,000)	33,000	260,000
BALANCE at Jan. 31, 2021	90,416,000	276,871,000	(60,413,000)	(8,957,000)	(117,937,000)	556,000	33,000	263,000
Exercise of stock options	501,000	501,000
Restricted Class B common stock purchased from employees	(1,336,000)		(1,336,000)
Grant of restricted equity in subsidiary (see Note 11).		(2,195,000)				2,195,000
Business acquisition	2,188,000					2,188,000
Stock-based compensation	434,000	431,000						3,000
Distributions to noncontrolling interests	(390,000)					(390,000)
Other comprehensive income (loss)	(1,769,000)			(1,769,000)
Net income (loss)	$ 13,205,000				$ 13,108,000	$ 97,000