Quarterly report pursuant to Section 13 or 15(d)

Net Loss per Share (Details Textual)

v3.8.0.1
Net Loss per Share (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Preferred Stock Dividends, Income Statement Impact $ 59 $ 0 $ 6,900
Equity Option [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 32,054,809 57,341,642  
Warrant [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 12,188,515 11,489,515