CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (3,551)	$ 4,792
Other comprehensive income (loss):
Foreign currency translation adjustment	2,973	13
Pension liability adjustments, net of tax	0	(2)
Other comprehensive income	2,973	11
Comprehensive (loss) income	$ (578)	$ 4,803