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DEBT - Schedule of Convertible Senior Notes due 2023 (Details) - Convertible Notes - Notes due 2023 - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Contractual interest expense	$ 50	$ 50
Amortization of debt issuance costs	10	10
Total interest cost recognized	$ 60	$ 60

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Amount of amortization expense attributable to debt issuance costs.

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

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