DEBT - Schedule of Convertible Senior Notes due 2023 (Details) - Convertible Notes - Notes due 2023 - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Contractual interest expense	$ 50	$ 50	$ 100	$ 100
Amortization of debt issuance costs	10	10	20	20
Total interest cost recognized	$ 60	$ 60	$ 120	$ 120

Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration