Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share (Details 1)

v3.7.0.1
Net Loss Per Share (Details 1) - shares
shares in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities 7,629 6,935
Options to purchase common stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities 2,537 2,303
Warrants for common stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities 5,092 4,085
Common stock issuable upon conversion of preferred shares [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities 0 547