Quarterly report pursuant to Section 13 or 15(d)

Debt - Notes (Details)

v3.4.0.3
Debt - Notes (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Debt Instrument [Roll Forward]    
Amortization of debt issuance costs $ 37 $ 751
Change in fair value of embedded derivative (1,423) $ (49,788)
Notes    
Debt Instrument [Roll Forward]    
Embedded conversion option, beginning balance 23,737  
2033 Senior Notes, beginning balance 32,200  
Discount, beginning balance (6,525)  
Debt issuance cost, beginning balance (426)  
Total, beginning balance 48,986  
Amortization of debt discount 447  
Amortization of debt issuance costs 37  
Amortization of debt discount and debt issuance costs 484  
Change in fair value of embedded derivative 138  
Embedded conversion option, conversion 0  
Convertible notes, conversion 0  
Discount, conversion 0  
Conversion 0  
Embedded conversion option, ending balance 23,875  
2033 Senior Notes, ending balance 32,200  
Discount, ending balance (6,078)  
Debt issuance cost, ending balance (389)  
Total, ending balance $ 49,608