Debt (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Convertible Notes Components

The Convertible Notes consisted of the following at December 31, 2015 (in thousands):



Liability component:
Principal	$	120,000
Less: unamortized debt discount and debt issuance costs	(37,539		)
Net carrying amount	$	82,461
Equity component	$	38,305

Schedule of Convertible Notes Interest Expense

The following table sets forth total interest expense recognized related to the Convertible Notes during the year ended December 31, 2015 (in thousands):



Contractual interest expense	$	3,667
Amortization of debt discount	4,400
Amortization of debt issuance costs	292
Total interest expense	$	8,359

Schedule of Maturities of Long-term Debt

The minimum calendar year payments and maturities of long-term debt are as follows (in thousands):



2016	$	3,561
2017	247
2018	247
2019	—
2020	120,000
Thereafter	—
Total	$	124,055