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RELATED PARTY TRANSACTIONS - August 2022 Exchange Agreement (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Aug. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2023	Jun. 09, 2023	Mar. 13, 2023	Aug. 15, 2022	Mar. 31, 2018
Related Party Transaction [Line Items]
2.50% Notes extinguished in connection with exchange transaction		$ 0	$ 49,624	$ 0
Capital contribution from related-party in connection with exchange transaction			29,847
Accrued interest expense		0	663
Convertible Notes
Related Party Transaction [Line Items]
Contractual coupon interest		2,425	1,794	$ 3,934
2.50% Convertible Notes due 2023 \| Convertible Notes
Related Party Transaction [Line Items]
Interest rate							2.50%		2.50%
Net carrying amount		726	56,413		$ 66,900
Accrued interest expense						$ 1,000
2.50% Convertible Notes due 2023 \| Senior Notes \| Affiliated Entity
Related Party Transaction [Line Items]
Net carrying amount		700
August 2022 Exchange Agreement \| Jack W. Schuler Living Trust \| Embedded Warrant
Related Party Transaction [Line Items]
Warrants fair value	$ 3,800
August 2022 Exchange Agreement \| Senior Notes \| Affiliated Entity \| Jack W. Schuler Living Trust
Related Party Transaction [Line Items]
Contractual coupon interest			700
Amortization of debt discount			800
Net carrying amount		0	16,900
Accrued interest expense			700
August 2022 Exchange Agreement \| 2.50% Convertible Notes due 2023 \| Senior Notes \| Jack W. Schuler Living Trust
Related Party Transaction [Line Items]
Fair value	16,000
August 2022 Exchange Agreement \| 2.50% Convertible Notes due 2023 \| Secured Debt \| Jack W. Schuler Living Trust
Related Party Transaction [Line Items]
2.50% Notes extinguished in connection with exchange transaction	49,600
Capital contribution from related-party in connection with exchange transaction		$ 29,800
August 2022 Exchange Transaction \| Jack W. Schuler Living Trust \| Embedded Warrant
Related Party Transaction [Line Items]
Warrants fair value								$ 3,800
August 2022 Exchange Transaction \| 2.50% Convertible Notes due 2023 \| Convertible Notes \| Jack W. Schuler Living Trust
Related Party Transaction [Line Items]
Aggregate principal amount exchanged	49,900
August 2022 Exchange Transaction \| 2.50% Convertible Notes due 2023 \| Senior Notes \| Jack W. Schuler Living Trust
Related Party Transaction [Line Items]
Fair value	$ 16,000
August 2022 Exchange Transaction \| 2.50% Convertible Notes due 2023 \| Secured Debt \| Jack W. Schuler Living Trust
Related Party Transaction [Line Items]
Capital contribution from related-party in connection with exchange transaction			$ 29,800