CONVERTIBLE NOTES AND CREDIT FACILITY (Tables)

6 Months Ended

Jun. 30, 2020

Debt Disclosure [Abstract]

Convertible Debt

	June 30, 2020		December 31, 2019
Carrying amount of equity component	$	39,508	$	39,508
Principal amount of the Notes	86,250		86,250
Unamortized debt discount	(37,854)		(40,902)
Net carrying amount	$	48,396	$	45,348

Interest Income and Interest Expense Disclosure

Interest expense related to the Notes for the three and six months ended June 30, 2020 was $2.3 million and $4.7 million, respectively, which is comprised of the amortization of debt discount and debt issuance costs and the contractual coupon interest as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Interest expense related to contractual coupon interest	$	809	$	—	$	1,617	$	—
Interest expense related to amortization of the debt discount	1,524		—		3,049		—
	$	2,333	$	—	$	4,666	$	—