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Stockholders' Equity - Stock Split (Details)
Jun. 11, 2020
$ / shares
shares
Sep. 30, 2021
$ / shares
shares
Dec. 31, 2020
$ / shares
shares
Stockholders' Equity Note [Abstract]      
Reverse stock split ratio 0.2    
Common stock, par value (USD per share) | $ / shares $ 0.0001 $ 0.0001 $ 0.0001
Common stock, authorized (in shares) | shares 50,000,000 50,000,000 50,000,000