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Stock-based Compensation - Common Stock Options Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Aug. 31, 2020
Nov. 30, 2019
Number of Shares    
Outstanding Balance, December 1, 2019 (in shares) 85,000  
Options granted (in shares) 0  
Options exercised (in shares) 0  
Options forfeited (in shares) 0  
Options expired (in shares) (85,000)  
Options outstanding, August 31, 2020 (in shares) 0 85,000
Exercisable at August 31, 2020 (in shares) 0 85,000
Unvested at August 31, 2020 (in shares) 0  
Weighted Average Exercise Price per Share    
Outstanding Balance, December 1, 2019 (in dollars per share) $ 6.94  
Options granted (in dollars per share) 0  
Options exercised (in dollars per share) 0  
Options forfeited (in dollars per share) 0  
Options expired (in dollars per share) 6.94  
Options outstanding, August 31, 2020 (in dollars per share) 0 $ 6.94
Exercisable at August 31, 2020 (in dollars per share) 0  
Unvested at August 31, 2020 (in dollars per share) $ 0  
Weighted Average Remaining Contractual Term    
Outstanding Balance, December 1, 2019   6 months 21 days
Aggregate Intrinsic Value    
Outstanding Balance, December 31, 2019 $ 0  
Options outstanding, August 31, 2020 0 $ 0
Unvested at August 31, 2020 $ 0