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Loss per Share - Schedule of Antidilutive Securities Excluded from Diluted Income (Loss) per Share (Details) - shares
6 Months Ended
Jun. 30, 2021
Jun. 30, 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) 3,655,135 4,304,241
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) 1,090,890 531,741
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 3,474,500
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