Quarterly report pursuant to Section 13 or 15(d)

Net Loss per Share - Additional Information (Details)

v3.19.3
Net Loss per Share - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Series A Preferred Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Preferred Stock Dividends, Income Statement Impact $ 63 $ 61 $ 185 $ 181
Series B Preferred Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Preferred Stock Dividends, Income Statement Impact $ 70 $ 0 $ 585 $ 0
Equity Option [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 803,577 347,765    
Warrant [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount     18,915,851 915,852