CONVERTIBLE NOTES - Narrative (Details)						12 Months Ended
	Aug. 15, 2022 USD ($) $ / shares	Mar. 21, 2022 USD ($)	Apr. 04, 2018 USD ($)	Apr. 04, 2018 USD ($)	Mar. 27, 2018 USD ($) day	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($)	Mar. 24, 2023 shares	Mar. 13, 2023
Debt Instrument [Line Items]
Proceeds from debt						$ 0	$ 0	$ 5,578,000
Convertible notes due from related-party extinguished in connection with the exchange transaction, net of deferred issuance costs						49,624,000	0	0
Gain on extinguishment of debt						3,565,000	9,793,000	$ 0
Capital contribution from related-party in connection with exchange transaction						29,847,000
August 2022 Exchange Transaction | Jack W. Schuler Living Trust | Embeded Warrant
Debt Instrument [Line Items]
Warrants fair value	$ 3,800,000
August 2022 Exchange Transaction | Jack W. Schuler Living Trust | Level 3 | Embeded Warrant
Debt Instrument [Line Items]
Warrants fair value	3,800,000
Prepaid Forward
Debt Instrument [Line Items]
Funded prepaid forward						$ 45,100,000
Stock underlying the prepaid forward (in shares) | shares						1,858,500
Prepaid Forward | Subsequent Event
Debt Instrument [Line Items]
Number of shares prepaid (in shares) | shares									1,858,500
Forbearance Agreement | Subsequent Event
Debt Instrument [Line Items]
Percentage of outstanding debt holding										85.00%
Convertible Notes | 2.50% Convertible Notes due 2023
Debt Instrument [Line Items]
Aggregate principal amount					$ 150,000,000
Interest rate					2.50%
Over-allotment option, term					13 days
Over-allotment option					$ 22,500,000
Additional proceeds			$ 21,500,000
Proceeds from debt				$ 171,500,000
Contractual term					5 years
Effective interest rate					3.20%
Repurchase principal balance, percent					100.00%
Total debt						$ 56,413,000	107,984,000
Fair value						51,900,000	89,400,000
Convertible Notes | 2.50% Convertible Notes due 2023 | 2021 Exchange Transaction
Debt Instrument [Line Items]
Aggregate principal amount exchanged							$ 51,000,000
Shares issued ( in shares) | shares							6,602,974
Notes exchanged							$ 44,700,000
Convertible notes due from related-party extinguished in connection with the exchange transaction, net of deferred issuance costs							38,900,000
Reacquisition costs							900,000
Gain on extinguishment of debt							$ 4,900,000
Convertible Notes | 2.50% Convertible Notes due 2023 | March 2022 Exchange Transaction
Debt Instrument [Line Items]
Aggregate principal amount exchanged						$ 14,000,000
Shares issued ( in shares) | shares						10,798,482
Notes exchanged						$ 14,000,000
Convertible notes due from related-party extinguished in connection with the exchange transaction, net of deferred issuance costs		$ 10,200,000				10,800,000
Reacquisition costs						200,000
Gain on extinguishment of debt						$ 3,600,000
Convertible Notes | 2.50% Convertible Notes due 2023 | August 2022 Exchange Transaction | Jack W. Schuler Living Trust
Debt Instrument [Line Items]
Convertible notes due from related-party extinguished in connection with the exchange transaction, net of deferred issuance costs	49,900,000
Convertible Notes | 2.50% Convertible Notes due 2023 | Option one to convert
Debt Instrument [Line Items]
Stock price conversion threshold, percentage					130.00%
Consecutive trading days | day					20
Threshold trading days | day					30
Convertible Notes | 2.50% Convertible Notes due 2023 | Option two to convert
Debt Instrument [Line Items]
Consecutive trading days | day					5
Threshold trading days | day					5
Trading price threshold, percentage					98.00%
Senior Notes | Five Point Zero Percent Secured Promissory Note | Jack W. Schuler Living Trust | Level 3
Debt Instrument [Line Items]
Fair value	$ 16,000,000
Senior Notes | Five Point Zero Percent Secured Promissory Note | August 2022 Exchange Transaction | Jack W. Schuler Living Trust
Debt Instrument [Line Items]
Interest rate	5.00%
Effective interest rate						24.60%
Total debt						$ 16,858,000
Convertible notes due from related-party extinguished in connection with the exchange transaction, net of deferred issuance costs	$ 34,900,000
Initial conversion price (in dollars per share) | $ / shares	$ 2.12
Senior Notes | Five Point Zero Percent Secured Promissory Note | August 2022 Exchange Transaction | Jack W. Schuler Living Trust | Level 3
Debt Instrument [Line Items]
Fair value	$ 16,000,000
Secured Debt | Five Point Zero Percent Secured Promissory Note | August 2022 Exchange Transaction | Jack W. Schuler Living Trust
Debt Instrument [Line Items]
Convertible notes due from related-party extinguished in connection with the exchange transaction, net of deferred issuance costs	49,600,000
Capital contribution from related-party in connection with exchange transaction	$ 29,800,000