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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Apr. 30, 2020
Jul. 31, 2019
Accounts receivable, trade, allowance for doubtful accounts $ 424 $ 1,804
Preferred stock, par value (in usd per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 4,965,000 4,965,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in usd per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 1,400,000,000 1,400,000,000
Common stock, shares issued (in shares) 62,383,678 61,805,856
Common stock, shares outstanding (in shares) 62,383,678 61,805,856
Contingent Redeemable Preferred Stock    
Preferred stock, par value (in usd per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 35,000 35,000
Preferred stock, shares issued (in shares) 35,000 35,000
Preferred stock, shares outstanding (in shares) 35,000 35,000