STOCKHOLDERS' DEFICIT - Pre-emergence from Bankruptcy (Details)				1 Months Ended			12 Months Ended
	Nov. 20, 2023 USD ($) shares	Nov. 16, 2023 USD ($)	Jan. 19, 2022 $ / shares shares	Jul. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2022 shares	Jul. 31, 2021 USD ($)	Dec. 31, 2024 $ / shares shares	Dec. 31, 2023 USD ($) vote $ / shares shares	Dec. 31, 2022 USD ($) shares	Jan. 23, 2024 $ / shares shares	Jan. 18, 2022 shares	Mar. 31, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)							10,000,000,000	10,000,000,000		10,000,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.0001				$ 0.00001	$ 0.0001		$ 0.00001
Voting rights per share | vote								1
Recapitalization transaction, conversion ratio											1
Common stock, exchange ratio			1.60015286880
Issuances of common stock - vendor settlement | $								$ 12,674,000
Exercise price of warrants (in dollars per share) | $ / shares								$ 11.50
SPAC vesting shares (in shares)											1,700,000
Issuances of common stock- vendor settlement (in shares)					1,600,000
Number of consecutive days						30 days
Lockup period						180 days
Vendor liability, contractual amount | $						$ 21,300,000
Vendor liability, changes in fair value | $								$ 0	$ 9,500,000
Vendor liability, fair value | $								18,100,000
2021 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, number of shares authorized (in shares)							45,000,000
Minimum | 2021 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, award vesting period							1 year
Maximum | 2021 Equity Incentive Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, award expiration period							10 years
Conversion Of Convertible Notes Into Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Debt conversion, converted amount | $								$ 0	$ 1,600,000
Debt conversion, converted instrument, shares issued (in shares)									200,000
Convertible Notes
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Note payable face amount | $									$ 514,800,000
Debt instrument, increase | $									$ 31,400,000
Debt instrument, convertible price (in dollars per share) | $ / shares			$ 8.00
B. Riley Principal Capital II, LLC | Common Stock Equity Line Of Credit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, par value (in dollars per share) | $ / shares				$ 0.0001
Sale of stock, authorized amount | $				$ 100,000,000
Reimbursement of legal fees | $				$ 100,000
Sale of stock, number of shares issued (in shares)									13,400,000
Consideration amount | $									$ 20,700,000
Equity line of credit, discount | $									$ 600,000
Discount rate									3.00%
Public Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants exercised (in shares)								8,600,000
Public Warrants | XPDI
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants exercised (in shares)											8,600,000
Private Placement Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants exercised (in shares)								6,300,000
Private Placement Warrants | XPDI
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants exercised (in shares)											6,300,000
Executive Notes Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants exercised (in shares)												6,400,000
Exercise price of warrants (in dollars per share) | $ / shares												$ 0.84
Class of warrant or right, warrants exercised (in shares)					3,200,000			0	4,400,000
Cashless exercise of warrants (in shares)					2,900,000				3,000,000
Shares withheld for tax withholding obligation (in shares)					300,000
Service Providers Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants exercised (in shares)												200,000
Exercise price of warrants (in dollars per share) | $ / shares												$ 4.27
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuances of common stock - Merger with XPDI (in shares)			30,800,000
Equity line of credit, shares remaining for issuance (in shares)								0
Common Stock, Commitment Shares | B. Riley Principal Capital II, LLC | Common Stock Equity Line Of Credit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuances of common stock - vendor settlement (in shares)				600,000
Issuances of common stock - vendor settlement | $				$ 1,100,000
ERO Shares | Holders of Equity Rights Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity right offering, amount | $	$ 55,000,000
Backstop amount | $		$ 37,100,000
ERO Shares | Equity Rights Offering | Holders of Equity Rights Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sale of stock, number of shares issued (in shares)	15,648,896
New Common Stock | Equity Rights Offering | Holders of Equity Rights Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sale of stock, number of shares issued (in shares)	2,111,178