XML 49 R36.htm IDEA: XBRL DOCUMENT v3.7.0.1
Debt - Interest Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Term Loan        
Debt Instrument [Line Items]        
Contractual interest expense $ 335   $ 335  
Amortization of debt discount 63   63  
Amortization of debt issuance costs 296   296  
Total interest expense 694   694  
Convertible Debt        
Debt Instrument [Line Items]        
Contractual interest expense 1,650 $ 1,650 3,300 $ 3,300
Amortization of debt discount 2,243 1,980 4,460 3,960
Amortization of debt issuance costs 132 131 263 263
Total interest expense $ 4,025 $ 3,761 $ 8,023 $ 7,523