CONVERTIBLE NOTES AND CREDIT FACILITY (Tables)

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Convertible Debt

	September 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	(36,329)		(40,902)
Net carrying amount	$	49,921	$	45,348

Interest Income and Interest Expense Disclosure

Interest expense related to the Notes for the three and nine months ended September 30, 2020 was $2.3 million and $7.0 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 September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Interest expense related to contractual coupon interest	$	809	$	117	$	2,426	$	117
Interest expense related to amortization of the debt discount	1,524		220		$	4,573	220
	$	2,333	$	337	$	6,999	$	337