Debt (Tables)

6 Months Ended

Jun. 30, 2017

The Term Loan consisted of the following at June 30, 2017 (in thousands):



Principal	$	20,000
Less: unamortized debt discount and debt issuance costs	(2,065		)
Net carrying amount	$	17,935

Convertible Debt

The Convertible Notes consisted of the following at June 30, 2017 and December 31, 2016 (in thousands):



	June 30, 2017			December 31, 2016
Liability component:
Principal	$	120,000		$	120,000
Less: unamortized debt discount and debt issuance costs	(27,969		)	(29,092		)
Net carrying amount	$	92,031		$	90,908
Equity component	$	41,905		$	38,305

Interest Expense Summary

The following table sets forth total interest expense recognized related to the Convertible Notes during the three and six months ended June 30, 2017 and 2016 (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
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

The following table sets forth total interest expense recognized related to the Term Loan during the three and six months ended June 30, 2017 (in thousands):



Contractual interest expense	$	335
Amortization of debt discount	296
Amortization of debt issuance costs	63
Total interest expense	$	694