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INCOME TAXES (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2020
Jan. 31, 2019
Income Tax Disclosure [Abstract]        
Provision for (benefit from) income taxes $ 4,642 $ 2,210 $ 8,565 $ (1,418)
Valuation allowance release       $ 5,900