COMPREHENSIVE INCOME (LOSS) - Accumulated Other Comprehensive Income Items (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ (13,431)	$ 47,894	$ 6,212	$ 48,818
Foreign currency translation adjustment	(13)	2,420	185	5,393
Total other comprehensive (loss) income	(13)	2,420	185	5,393
Ending balance	(36,740)	47,747	(36,740)	47,747
Accumulated Other Comprehensive Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	7,360	6,816	7,162	3,843
Foreign currency translation adjustment			185	5,393
Total other comprehensive (loss) income			185	5,393
Ending balance	7,347	9,236	7,347	9,236
Foreign Currency Items
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			9,762	5,025
Foreign currency translation adjustment			185	5,393
Total other comprehensive (loss) income			185	5,393
Ending balance	9,947	10,418	9,947	10,418
Pension Items
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(2,600)	(1,182)
Foreign currency translation adjustment			0	0
Total other comprehensive (loss) income			0	0
Ending balance	$ (2,600)	$ (1,182)	$ (2,600)	$ (1,182)