CONVERTIBLE NOTES - 2.50% Notes (Narrative) (Details) $ / shares in Units, shares in Millions					1 Months Ended					7 Months Ended	12 Months Ended
	Jun. 09, 2023 USD ($) $ / shares shares	Apr. 21, 2023 USD ($)	Mar. 13, 2023	Apr. 04, 2018 USD ($)	Aug. 31, 2023	Jun. 30, 2023 USD ($) shares	Mar. 31, 2023 USD ($)	Aug. 31, 2022 USD ($) $ / shares	Mar. 31, 2018 USD ($)	Mar. 31, 2022 USD ($) shares	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Oct. 18, 2023 $ / shares	Aug. 15, 2022 USD ($)
Debt Instrument [Line Items]
Capital contribution from related-party in connection with exchange transaction												$ 29,847,000
Outstanding notes | Lender | Ad Hoc Noteholder Group
Debt Instrument [Line Items]
Risk concentration (as a percent)			85.00%				85.00%
August 2022 Exchange Transaction | Jack W. Schuler Living Trust | Embedded Warrant
Debt Instrument [Line Items]
Warrants fair value															$ 3,800,000
Convertible Notes | Exchange Agreement
Debt Instrument [Line Items]
Gain on extinguishment of debt											$ (6,499,000)	3,565,000	$ 4,916,000
Senior Notes | June 2023 Exchange Transaction | Affiliated Entity
Debt Instrument [Line Items]
Shares issued (in shares) | shares						3.4
2.50% Convertible Notes due 2023 | Convertible Notes
Debt Instrument [Line Items]
Aggregate principal amount						$ 10,000,000			$ 150,000,000
Interest rate			2.50%						2.50%
Over-allotment option, term									13 days
Over-allotment option									$ 22,500,000
Additional proceeds				$ 21,500,000
Proceeds from issuance of 5.00% Notes				$ 171,500,000
Contractual term				5 years
Reacquisition costs												200,000	900,000
Gain on extinguishment of debt												3,600,000	$ 4,900,000
Total convertible notes						66,900,000					726,000	56,413,000
2.50% Convertible Notes due 2023 | Convertible Notes | Exchange Agreement
Debt Instrument [Line Items]
Aggregate principal amount exchanged										$ 65,000,000
Shares issued (in shares) | shares										1.7
2.50% Convertible Notes due 2023 | Convertible Notes | August 2022 Exchange Transaction | Jack W. Schuler Living Trust
Debt Instrument [Line Items]
Aggregate principal amount exchanged								$ 49,900,000
2.50% Convertible Notes due 2023 | Convertible Notes | June 2023 Exchange Transaction
Debt Instrument [Line Items]
Aggregate principal amount exchanged						$ 55,900,000
Gain on extinguishment of debt											(6,600,000)
2.50% Convertible Notes due 2023 | Senior Notes | Affiliated Entity
Debt Instrument [Line Items]
Total convertible notes											700,000
2.50% Convertible Notes due 2023 | Senior Notes | August 2022 Exchange Transaction | Jack W. Schuler Living Trust
Debt Instrument [Line Items]
Fair value								$ 16,000,000
2.50% Convertible Notes due 2023 | Secured Debt | August 2022 Exchange Transaction | Jack W. Schuler Living Trust
Debt Instrument [Line Items]
Capital contribution from related-party in connection with exchange transaction												29,800,000
Five Point Zero Percent Secured Promissory Note | Senior Notes | Affiliated Entity | Jack W. Schuler Living Trust
Debt Instrument [Line Items]
Shares issued (in shares) | shares	3.4
Gain on extinguishment of debt	$ (6,100,000)
Initial conversion price (in dollars per share) | $ / shares	$ 10.60
Five Point Zero Percent Secured Promissory Note | Senior Notes | August 2022 Exchange Transaction | Affiliated Entity
Debt Instrument [Line Items]
Initial conversion price (in dollars per share) | $ / shares								$ 21.20
Five Point Zero Percent Secured Promissory Note | Senior Notes | August 2022 Exchange Transaction | Affiliated Entity | Jack W. Schuler Living Trust
Debt Instrument [Line Items]
Aggregate principal amount exchanged		$ 34,900,000						$ 34,900,000
Fair value												16,000,000
Total convertible notes												16,858,000
Forbearance Agreement
Debt Instrument [Line Items]
Default indebtedness outstanding							$ 15,000,000
Default forbearance premium							$ 0.005
Forbearance Agreement | Ad Hoc Noteholder Group
Debt Instrument [Line Items]
Forbearance premium											200,000
5.00% Convertible Notes Due 2026 | Convertible Notes
Debt Instrument [Line Items]
Interest rate	5.00%					5.00%
Contractual term						3 years 6 months
Gain on extinguishment of debt						$ 14,100,000
Initial conversion price (in dollars per share) | $ / shares														$ 7.20
Conversion ratio	0.13888889				0.13888889	0.13888889
Total convertible notes						$ 66,900,000					$ 36,102,000	$ 0
5.00% Convertible Notes Due 2026 | Convertible Notes | June 2023 Exchange Transaction
Debt Instrument [Line Items]
Aggregate principal amount						10,000,000
Aggregate principal amount exchanged						$ 56,900,000