DEBT - Schedule of Interest Cost Recognized In Statements Of Operations (Details) - Convertible Notes - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Notes due 2028
Debt Instrument [Line Items]
Amortization of debt issuance costs	$ 327	$ 327	$ 643	$ 643
Total interest cost recognized	327	327	643	643
Notes due 2026
Debt Instrument [Line Items]
Amortization of debt issuance costs	502	502	987	987
Total interest cost recognized	502	502	987	987
Notes due 2025
Debt Instrument [Line Items]
Contractual interest expense	64	64	128	128
Amortization of debt discount	1,144	1,088	2,249	2,137
Amortization of debt issuance costs	123	123	241	241
Total interest cost recognized	1,331	1,275	2,618	2,506
Notes due 2023
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 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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