REVENUE RECOGNITION REVENUE RECOGNITION - Contract Balances (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract assets	$ 14,458	$ 13,016
Deferred revenue - current	2,562	2,860
Deferred revenue - long-term	108	85
Total deferred revenue	2,670	2,945	$ 3,029
Trade Accounts Receivable
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, trade, net	$ 69,805	$ 93,072