XML 54 R41.htm IDEA: XBRL DOCUMENT v3.21.2
Stock-Based Compensation - Fair Value Assumptions (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Assumptions used        
Expected term (in years) 6 years 6 months      
Expected dividend yield (as a percent) 0.00%      
SARs liability $ 102,000      
Stock options        
Assumptions used        
Risk-free interest rate (as a percent) 1.02% 0.45%    
Expected volatility (as a percent) 123.32% 105.14%    
Expected term (in years) 6 years 3 months 6 years    
Expected dividend yield (as a percent) 0.00% 0.00%    
Weighted average grant date fair value (in dollars per share) $ 3.80 $ 3.75    
Annualized forfeiture rate (as a percent)     4.14% 4.14%
2021 SAR        
Assumptions used        
Risk-free interest rate (as a percent) 0.95%      
Expected volatility (as a percent) 129.79%      
Expected dividend yield (as a percent) 0.00%      
Weighted average grant date fair value (in dollars per share) $ 0.62