Annual report pursuant to Section 13 and 15(d)

Net Loss per Share Attributable to Common Stock - Antidilutive Securities (Details)

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Net Loss per Share Attributable to Common Stock - Antidilutive Securities (Details) - shares
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Stock option awards    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Common stock equivalents excluded from computation of diluted net loss per share attributable to common stock for the periods presented because their effect would have been anti-dilutive 47,332 37,130
Restricted stock awards    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Common stock equivalents excluded from computation of diluted net loss per share attributable to common stock for the periods presented because their effect would have been anti-dilutive 390,787 227,981
Common stock warrants    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Common stock equivalents excluded from computation of diluted net loss per share attributable to common stock for the periods presented because their effect would have been anti-dilutive 240,100