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Net Loss per Share of Common Stock (Antidilutive Securities) (Details) - shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Stock Option    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities (in shares) 578,624 269,292
Restricted Stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities (in shares) 0 0