Quarterly report pursuant to Section 13 or 15(d)

Common Stock, Share-based Awards and Warrants - Warrants by Exercise Price (Details)

v3.8.0.1
Common Stock, Share-based Awards and Warrants - Warrants by Exercise Price (Details) - Row 44 Warrants
3 Months Ended
Mar. 31, 2017
$ / shares
shares
Series C-2 Warrants  
Share-based Compensation, Shares Authorized under Equity Instruments Other Than Options, Exercise Price Range [Line Items]  
Number of warrants, as converted (in shares) 477,000
Weighted average exercise price per warrant (usd per share) | $ / shares $ 8.62
Weighted average remaining life 2 months 5 days
Common stock warrants  
Share-based Compensation, Shares Authorized under Equity Instruments Other Than Options, Exercise Price Range [Line Items]  
Number of warrants, as converted (in shares) 689,481