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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jul. 31, 2020
Jul. 31, 2019
Statement of Financial Position [Abstract]    
Trade receivables, allowances $ 2,484 $ 724
Inventories, reserves $ 4,447 $ 2,031
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized 25,000,000 25,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 46,350,000 46,190,000
Exchangeable Shares Par Value Per Share $ 0.01 $ 0.01
Exchangeable Shares, Shares, Issued 36,000 56,000
Treasury stock, shares 6,161,141 5,905,000