Quarterly report pursuant to Section 13 or 15(d)

Net Loss per Share - Additional Information (Details)

v3.19.2
Net Loss per Share - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Series A Preferred Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Preferred Stock Dividends, Income Statement Impact $ 61 $ 61 $ 122 $ 120
Series B Preferred Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Preferred Stock Dividends, Income Statement Impact $ 117 $ 0 $ 515 $ 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 843,119 12,168,515 843,119 12,168,515
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 32,054,809 18,915,851 32,054,809