Annual report pursuant to Section 13 and 15(d)

Stock-based Plans and Stock-based Compensation (Valuation Assumptions) (Details)

v3.22.1
Stock-based Plans and Stock-based Compensation (Valuation Assumptions) (Details)
12 Months Ended
Dec. 15, 2021
Aug. 11, 2021
May 17, 2021
Mar. 26, 2021
Dec. 17, 2020
Dec. 07, 2020
Nov. 05, 2020
Apr. 06, 2020
Mar. 24, 2020
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Expected life (years)                   6 years 6 years
Expected dividend yield                   0.00% 0.00%
Expected volatility 71.53% 73.29% 74.79% 73.97% 77.41% 77.35% 77.36% 78.21% 77.56%    
Minimum [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Risk-free interest rate                   0.42% 0.42%
Expected volatility                   59.90% 77.36%
Maximum [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Risk-free interest rate                   0.58% 0.58%
Expected volatility                   80.26% 78.21%