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Loss per Share - Schedule of Antidilutive Securities Excluded from Diluted Income (Loss) per Share (Details) - shares
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Dilutive common shares excluded from the calculations of diluted loss per share (in shares) 3,255,508 4,022,741
Outstanding Stock Options [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Dilutive common shares excluded from the calculations of diluted loss per share (in shares) 691,263 87,741
Outstanding Warrants [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Dilutive common shares excluded from the calculations of diluted loss per share (in shares) 2,141,378 3,637,000
Convertible Preferred Stock [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Dilutive common shares excluded from the calculations of diluted loss per share (in shares) 422,867 298,000