BORROWINGS AND COMMON STOCK WARRANTS - Narrative (Details) $ / shares in Units, shares in Millions						3 Months Ended
	Jun. 21, 2024 USD ($) state $ / shares shares	Apr. 08, 2024 USD ($) $ / shares shares	Dec. 27, 2023 USD ($)	Oct. 02, 2023 USD ($) $ / shares shares	Aug. 04, 2023 USD ($) $ / shares shares	Mar. 31, 2025 USD ($) $ / shares	Mar. 31, 2024 USD ($) $ / shares	Dec. 31, 2024 USD ($)	Oct. 29, 2024 USD ($)	Jan. 02, 2024 USD ($)	Mar. 31, 2021 USD ($)
Class of Warrant or Right [Line Items]
Short-term borrowings						$ 1,000,000		$ 2,000,000
Gain on troubled debt restructuring						0	$ 30,311,000
Troubled debt restructuring, decrease of diluted loss per share (In dollars per share) | $ / shares							$ (3.68)
Troubled debt restructuring, decrease of basic loss per share (In dollars per share) | $ / shares							$ (3.68)
Current maturities						1,000,000		2,000,000
Term Principal						197,350,000		198,350,000
Debt instrument, unamortized discount						6,980,000		7,223,000
2028						196,350,000
Warrant liability						27,089,000		29,738,000
Warrant income						(2,649,000)	$ (2,072,000)
Centrum | Controlling Interest Holder
Class of Warrant or Right [Line Items]
Ownership percentage									25.00%
2024 NEA Warrantholders Agreement
Class of Warrant or Right [Line Items]
Warrants available						$ 6,800,000
Warrant liability		$ 6,800,000
Warrant available to be issued (in shares) | shares		1.1
Fair market value per share (in dollars per share) | $ / shares		$ 6.14
Warrant period						5 years
2023 Warrantholders Agreement
Class of Warrant or Right [Line Items]
Exercise price of warrants (in dollars per share) | $ / shares						$ 0.01
Warrant liability					$ 25,100,000
Warrant available to be issued (in shares) | shares					1.7
Fair market value per share (in dollars per share) | $ / shares					$ 15.12
CalSTRS Warrantholders Agreement
Class of Warrant or Right [Line Items]
Warrant liability				$ 1,000,000
Warrant available to be issued (in shares) | shares				0.2
Fair market value per share (in dollars per share) | $ / shares				$ 5.80
Hercules Warrantholders Agreements
Class of Warrant or Right [Line Items]
Exercise price of warrants (in dollars per share) | $ / shares	$ 0.01
Warrant liability	$ 6,400,000
Fair market value per share (in dollars per share) | $ / shares	$ 5.14
Warrants to purchase our common stock (in shares) | shares	1.3
Warrantholders Agreement
Class of Warrant or Right [Line Items]
Warrant income						$ (2,600,000)	$ (2,100,000)
Centrum P-units
Class of Warrant or Right [Line Items]
Current maturities						1,000,000		2,000,000
Term Principal						7,000,000		8,000,000
Debt instrument, unamortized discount						$ 0		0
Interest on debt instrument (as a percent)						6.00%			6.00%
2028						$ 6,000,000
2023 Credit Agreement
Class of Warrant or Right [Line Items]
Current maturities						0		0
Term Principal						96,400,000		96,400,000
Debt instrument, unamortized discount						$ 5,977,000		6,168,000
Interest on debt instrument (as a percent)						15.00%	15.00%
2028						$ 96,400,000
Centrum Promissory Note
Class of Warrant or Right [Line Items]
Current maturities						0		0
Term Principal						63,950,000		63,950,000	$ 64,000,000
Debt instrument, unamortized discount						$ 0		0
Interest on debt instrument (as a percent)						6.00%
2028						$ 63,950,000
Discontinued Operations | California Medicare Advantage Business
Class of Warrant or Right [Line Items]
Cash collateralization of existing letters			$ 24,100,000
Revolving Credit Facility | Hercules Warrantholders Agreements
Class of Warrant or Right [Line Items]
Revolving credit facility	$ 150,000,000
Warrant assets	$ 6,400,000					5,300,000		5,300,000
Number of tranches | state	4
Debt instrument, unamortized discount	$ 1,200,000
Revolving Credit Facility | Tranche 2
Class of Warrant or Right [Line Items]
Term Principal						25,000,000
Revolving Credit Facility | Tranche 3
Class of Warrant or Right [Line Items]
Term Principal						45,000,000
Interest rate reasonable redemption						22,500,000
Revolving Credit Facility | Tranche 4
Class of Warrant or Right [Line Items]
Term Principal						50,000,000
Revolving Credit Facility | Line of Credit
Class of Warrant or Right [Line Items]
Revolving credit facility											$ 350,000,000
Undrawn letters of credit						7,500,000		16,500,000
Revolving Credit Facility | Letter of Credit | Debt and interest repayment
Class of Warrant or Right [Line Items]
Repayments of lines of credit			$ 274,600,000
Short-term borrowings										$ 0
Secured Debt | Line of Credit | Delayed Draw Term Loan
Class of Warrant or Right [Line Items]
Revolving credit facility					$ 60,000,000
Term loan commitment increase in an aggregate principal amount				$ 6,400,000
Secured Debt | Line of Credit | 2023 Credit Agreement
Class of Warrant or Right [Line Items]
Term loan commitment increase in an aggregate principal amount						30,000,000
Warrant assets						0		$ 0
Debt instrument, unused borrowing capacity, amount						$ 120,000,000
Effective annual interest rate						2.50%