CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (2,196)	$ (3,557)	$ (5,747)	$ 1,235
Other comprehensive income (loss):
Foreign currency translation adjustment	2,420	664	5,393	677
Net unrealized holding loss on securities, net of tax	0	(96)	0	(96)
Pension liability adjustments, net of tax	0	0	0	(2)
Other comprehensive income	2,420	568	5,393	579
Comprehensive income (loss)	$ 224	$ (2,989)	$ (354)	$ 1,814