REVENUE RECOGNITION REVENUE RECOGNITION - Contract Balances (Details) - USD ($) $ in Thousands	Jul. 31, 2020	Jul. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract assets	$ 13,016	$ 21,473
Deferred revenue - current	2,860	2,967
Deferred revenue - long-term	85	62
Total deferred revenue	2,945	3,029
Trade Accounts Receivable
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, trade, net	$ 93,072	$ 112,141