Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - Stock Options With Company's Market-based Option Activity (Details)

v3.21.1
Stock Based Compensation - Stock Options With Company's Market-based Option Activity (Details) - Market Based Options - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Number of shares      
Balance, beginning of period (in shares) 1,000,000    
Granted (in shares) 0    
Balance, ending of period (in shares) 1,000,000 1,000,000  
Exercisable (in shares) 1,000,000    
Weighted average exercise price per share      
Beginning of period (in dollars per share) $ 3.29    
Granted (in dollars per share) 0    
Ending of period (in dollars per share) $ 3.29 $ 3.29  
Weighted average remaining contractual term (in years)      
Balance 9 years 2 months 12 days 9 years 6 months  
Aggregate intrinsic value      
Aggregate intrinsic value   $ 65 $ 0
Exercisable aggregate intrinsic value $ 255