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Basic and Diluted Income (Loss) Per Common Share - Narrative (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Dilutive common share equivalents (in shares) 0   0
Warrants      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Securities excluded from computation (in shares)   2,019,972  
Convertible Preferred Stock      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Securities excluded from computation (in shares)   4,787,602