Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE OF FINANCIAL INSTRUMENTS - Activity for Warrant derivative Liability (Details)

v3.20.1
FAIR VALUE OF FINANCIAL INSTRUMENTS - Activity for Warrant derivative Liability (Details) - Recurring - USD ($)
$ in Thousands
3 Months Ended
Feb. 29, 2020
Nov. 30, 2019
Feb. 28, 2019
Nov. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Beginning Balance   $ 5,444    
Ending Balance $ 849      
Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Beginning Balance   5,444    
Ending Balance 849      
Level 3 | Derivative Warrant Liability        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Beginning Balance 2,240 5,444 $ 14,646 $ 14,430
Adjustments to estimated fair value (1,391) (3,204) (1,271) 216
Ending Balance $ 849 $ 2,240 $ 13,375 $ 14,646