Quarterly report pursuant to Section 13 or 15(d)

Debt (Summary) (Details)

v3.5.0.2
Debt (Summary) (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Dec. 15, 2014
Outstanding debt obligations      
Convertible debt, total $ 149,465 $ 146,418  
Term notes 135,303 138,335  
Convertible Notes      
Outstanding debt obligations      
Face amount 172,500 172,500  
Unaccredited discount on Convertible Notes (19,790) (22,367) $ (27,500)
Convertible debt, total 149,465 146,418  
Unamortized issuance costs (3,245) (3,715)  
Term Notes      
Outstanding debt obligations      
Face amount 146,000 150,000  
Unamortized issuance costs (4,633) (5,601)  
Term notes $ 141,367 $ 144,399