Annual report pursuant to Section 13 and 15(d)

Computation of Net Loss from Continuing Operations per Share of Common Stock Antidilutive Shares Excluded From the Computation of Earnings Per Share (Details)

v3.19.1
Computation of Net Loss from Continuing Operations per Share of Common Stock Antidilutive Shares Excluded From the Computation of Earnings Per Share (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1,771 1,960
Stock options    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1,273 1,507
Warrants    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 348 314
Restricted Stock Units (RSUs) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 150 139