Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Valuation Assumptions) (Details)

v3.21.2
Stockholders' Equity (Valuation Assumptions) (Details)
9 Months Ended
Aug. 11, 2021
May 02, 2021
Mar. 26, 2021
Dec. 17, 2020
Dec. 07, 2020
Nov. 05, 2020
Apr. 06, 2020
Mar. 24, 2020
Sep. 30, 2021
Sep. 30, 2020
Stockholders' Equity [Abstract]                    
Risk-free interest rate                 1.00% 0.49%
Expected life (years)                 6 years 6 years
Expected volatility 73.29% 74.79% 73.97% 77.41% 77.35% 77.36% 78.21% 77.56% 73.99% 78.20%