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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Aug. 31, 2020
Nov. 30, 2019
Statement Of Financial Position [Abstract]    
Preferred Stock, par value, per share (USD per share) $ 0.001 $ 0.001
Preferred Stock, shares authorized 5,000,000 5,000,000
Preferred Stock, shares issued 0 0
Preferred Stock, shares outstanding 0 0
Common Stock, par value, per share (USD per share) $ 0.001 $ 0.001
Common Stock, shares authorized 100,000,000 100,000,000
Common Stock, Shares, Issued 53,380,000 53,154,000
Treasury Stock, Shares 2,454,000 2,399,000