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DEBT - Schedule of Convertible Senior Notes due in 2028 (Details) - Convertible Notes - Convertible Senior Notes Due 2028 $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Debt Instrument [Line Items]
Amortization of debt discount	$ 1,611
Amortization of debt issuance costs	79
Total interest cost recognized	$ 1,690

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- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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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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