Debt (Tables)

6 Months Ended

Jun. 30, 2019

The carrying value of debt is as follows (in thousands):

	June 30,		December 31,
	2019		2018
Convertible senior notes	$	230,000	$	—
Revolving credit facility		—		30,950
Obligations for finance leases		1,298		813
Other borrowings		25		75
Total debt		231,323		31,838
Less: unamortized debt discount		51,443		—
Less: unamortized debt issuance costs		6,251		90
Less: current portion of long-term debt		472		331
Long-term debt, net of current portion	$	173,157	$	31,417

The net carrying value of the liability component of the Convertible Notes was as follows (in thousands):

	June 30,
	2019
Principal	$	230,000
Less: unamortized debt discount		51,443
Less: unamortized debt issuance costs		6,251
Net carrying amount	$	172,306

The net carrying value of the equity component of the Convertible Notes was as follows (in thousands):

	June 30,
	2019
Proceeds allocated to the conversion option (debt discount)	$	51,842
Less: issuance costs		1,833
Net carrying amount	$	50,009

The interest expense recognized related to the Convertible Notes was as follows (in thousands):

	Three Months Ended June 30,		Six Months Ended June 30,
	2019		2019
Contractual interest expense	$	25	$	25
Amortization of debt issuance cost and discount		447		447
Total	$	472	$	472