Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Preferred Shares (Details)

v3.4.0.3
Summary of Significant Accounting Policies - Preferred Shares (Details)
$ in Thousands
1 Months Ended 3 Months Ended
May. 31, 2015
Sep. 30, 2014
USD ($)
shares
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Preferred shares          
Deemed dividend, accretion of beneficial conversion feature       $ 6,434  
Series A Preferred Shares          
Preferred shares          
Stock issued (in shares) | shares   1,758,418      
Net consideration   $ 98,872      
Stock issuance costs   $ 4,949      
Conversion ratio, initial rate   1      
Conversion ratio, third anniversary of the issuance   2      
Conversion ratio, initial public offering   1      
Conversion ratio, initial public offering, third anniversary   2      
Deemed dividend, accretion of beneficial conversion feature     $ 2,229 $ 6,434 $ 6,073
Conversion ratio 1