CONVERTIBLE NOTES - Narrative (Details)							3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 09, 2023 USD ($) material $ / shares shares	Mar. 13, 2023 USD ($)	Mar. 21, 2022 USD ($) tranche	Apr. 04, 2018 USD ($)	Mar. 27, 2018 USD ($) day	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($) shares	Jun. 30, 2023	Jun. 30, 2023 shares	Jun. 30, 2023 $ / shares	Jun. 30, 2023 material	Apr. 21, 2023	Mar. 31, 2023 USD ($)	Mar. 24, 2023 shares	Mar. 15, 2023	Dec. 31, 2022 USD ($)	Aug. 15, 2022	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Equity Option
Debt Instrument [Line Items]
Derivative liability	$ 42,786,000	$ 38,200,000					$ 42,786,000	$ 0	$ 42,786,000	$ 0						$ 0			$ 0		$ 0	$ 0
Level 3 | Equity Option
Debt Instrument [Line Items]
Derivative liability	42,800,000						42,800,000		42,800,000
Prepaid Forward
Debt Instrument [Line Items]
Funded prepaid forward									45,100,000
Stock underlying the prepaid forward (in shares) | shares												200,000
Share price (in usd per share) | $ / shares													$ 24.25
Stock underlying the prepaid forward (in shares) | shares																	200,000
Restructuring Support Agreement | Common stock | Plan
Debt Instrument [Line Items]
Purchase price		$ 10,000,000
Affiliated Entity | Schuler Trust | March 2022 Securities Purchase Agreement
Debt Instrument [Line Items]
Agreement to purchase shares (in shares) | shares		500,000
Affiliated Entity | Schuler Trust | Restructuring Support Agreement
Debt Instrument [Line Items]
Purchase price		$ 10,000,000
Public offering backstop		10,000,000
Affiliated Entity | Schuler Trust | Restructuring Support Agreement | Common stock
Debt Instrument [Line Items]
Purchase price		10,000,000
Liabilities, Outstanding Notes | Lender Concentration Risk | Ad Hoc Noteholder Group
Debt Instrument [Line Items]
Risk concentration			85.00%
Convertible Notes
Debt Instrument [Line Items]
Outstanding principal	67,619,000						67,619,000		67,619,000										56,595,000
Debt premium	5,936,000						5,936,000		5,936,000										0
Carrying amount	33,015,000						33,015,000		33,015,000										$ 56,413,000
Convertible Notes | Exchange Agreement
Debt Instrument [Line Items]
(Loss) gain on extinguishment of debt							(6,550,000)	$ 199,000	(6,550,000)	$ 3,565,000
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%	2.50%		2.50%		2.50%		2.50%	2.50%				2.50%			2.50%	2.50%	2.50%
Over-allotment option, term						13 days
Over-allotment option, amount						$ 22,500,000
Proceeds from over-allotment option					$ 21,500,000
Proceeds from issuance of debt					$ 171,500,000
Outstanding principal	726,000						726,000		726,000										$ 56,595,000
Effective interest rate						3.20%
Debt term						5 years
Repurchase principal balance						100.00%
Debt outstanding, not converted and in default	$ 700,000						700,000		700,000
Interest rate	2.50%
Carrying amount	$ 726,000	$ 66,900,000					726,000		726,000										56,413,000
2.50% Convertible Notes Due 2023 | Convertible Notes | Restructuring Support Agreement
Debt Instrument [Line Items]
Notes exchanged		55,900,000
Accrued interest related-party		1,000,000
2.50% Convertible Notes Due 2023 | Convertible Notes | June 2023 Exchange Transaction
Debt Instrument [Line Items]
Notes exchanged		55,900,000
Accrued interest related-party		$ 1,000,000
(Loss) gain on extinguishment of debt							(6,600,000)		(6,600,000)
2.50% Convertible Notes Due 2023 | Convertible Notes | March 2022 Exchange Transaction
Debt Instrument [Line Items]
Notes exchanged				$ 14,000,000
Number of tranches | tranche				8
Conversion numerator				15.567
Shares issued (in shares)				0.00226
2.50% Convertible Notes Due 2023 | Convertible Notes | Exchange Agreement
Debt Instrument [Line Items]
Notes exchanged										$ 14,000,000
(Loss) gain on extinguishment of debt										3,600,000
Convertible notes value										$ 10,200,000
Shares issued (in shares) | shares										1,100,000
2.50% Convertible Notes Due 2023 | Convertible Notes | Option one
Debt Instrument [Line Items]
Stock price conversion threshold, percentage						130.00%
Consecutive trading days | day						20
Threshold trading days | day						30
2.50% Convertible Notes Due 2023 | Convertible Notes | Option two
Debt Instrument [Line Items]
Consecutive trading days | day						5
Threshold trading days | day						5
Trading price threshold, percentage						98.00%
2.50% Convertible Notes Due 2023 | Senior Notes | Affiliated Entity
Debt Instrument [Line Items]
Carrying amount	700,000						700,000		700,000
Forbearance Agreement
Debt Instrument [Line Items]
Default indebtedness outstanding			$ 15,000,000
Fee per $1,000 principal amount			0.005
Forbearance Agreement | Ad Hoc Noteholder Group
Debt Instrument [Line Items]
Forbearance premium									200,000
Forbearance Agreement | Other Holders
Debt Instrument [Line Items]
Amortization of premium									200,000
Debt premium			$ 200,000
5.00% Convertible Notes Due 2026 | Convertible Notes
Debt Instrument [Line Items]
Interest rate		5.00%									5.00%
Outstanding principal	66,893,000						66,893,000		66,893,000										0
Effective interest rate		27.30%
Debt term		3 years 6 months
Debt premium	5,936,000	$ 6,000,000					5,936,000		5,936,000										0
Accrued interest related-party	300,000						300,000		300,000
Paid in kind interest rate semi-annually		5.00%
Initial conversion price (in usd per share) | $ / shares		$ 7.20
Issuance costs		$ 3,000,000
Carrying amount	$ 32,289,000						32,289,000		32,289,000										$ 0
Conversion premium percent		50.00%
Shares issued (in shares)		0.13889
5.00% Convertible Notes Due 2026 | Convertible Notes | Minimum
Debt Instrument [Line Items]
Initial conversion price (in usd per share) | $ / shares		$ 8.30
Shares issued (in shares)		0.12048
5.00% Convertible Notes Due 2026 | Convertible Notes | Plan
Debt Instrument [Line Items]
Common stock issuable upon conversion (in shares)	9,300,000
5.00% Convertible Notes Due 2026 | Convertible Notes | Discount factor
Debt Instrument [Line Items]
Significant input		0.4400									0.25			0.4400
5.00% Convertible Notes Due 2026 | Convertible Notes | Level 3
Debt Instrument [Line Items]
Fair value	$ 35,200,000	$ 34,800,000					$ 35,200,000		$ 35,200,000
5.00% Convertible Notes Due 2026 | Convertible Notes | Restructuring Support Agreement
Debt Instrument [Line Items]
Aggregate principal amount		10,000,000
Notes exchanged		56,900,000
Convertible notes value		56,900,000
5.00% Convertible Notes Due 2026 | Convertible Notes | June 2023 Exchange Transaction
Debt Instrument [Line Items]
Notes exchanged		$ 56,900,000
5.00% Convertible Notes Due 2026 | Convertible Notes | Option one
Debt Instrument [Line Items]
Percentage of principal amount redeemed		100.00%
5.00% Convertible Notes Due 2026 | Convertible Notes | Option one | Minimum
Debt Instrument [Line Items]
Shares issued (in shares)		0.12048193
Restructuring Support Agreement | Senior Notes | Series A Preferred Stock
Debt Instrument [Line Items]
Shares issued (in shares) | shares		400,000
Restructuring Support Agreement | Senior Notes | Affiliated Entity
Debt Instrument [Line Items]
Shares issued (in shares) | shares		3,400,000