DEBT AND FINANCING ARRANGEMENTS (Tables)

6 Months Ended

Jun. 30, 2022

Debt Disclosure [Abstract]

Convertible Debt

The net carrying amount of the liability component of the Notes was as follows (in thousands), giving effect to the adoption of ASU 2020-06 on January 1, 2022:

	December 31, 2021		June 30, 2022
Principal	$	230,000	$	230,000
Minus: Unamortized debt discount	(41,098)		—
Minus: Unamortized issuance costs	(4,504)		(4,686)
Net carrying amount of the liability component	$	184,398	$	225,314

Prior to the adoption of ASU 2020-06, the net carrying amount of the equity component of the Notes was as follows (in thousands):

	December 31, 2021
Proceeds allocated to the conversion options (debt discount)	$	53,096
Minus: Issuance costs	(1,680)
Net carrying amount of the equity component	$	51,416

Interest expense recognized related to the Notes is as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2022			2021			2022
Contractual interest expense (due in cash)	$	575		$	575		$	1,150		$	1,150
Amortization of debt discount	2,359			—			4,680			—
Amortization of debt issuance costs	215			365			422			730
Total interest expense related to the Notes	$	3,149		$	940		$	6,252		$	1,880
Effective interest rate	5.48		%	1.64		%	5.44		%	1.64		%