Notes Payable (Details) $ / shares in Units, € in Thousands								1 Months Ended									11 Months Ended	12 Months Ended					27 Months Ended
	Dec. 08, 2022 USD ($) $ / shares shares	Oct. 31, 2021 USD ($)	Aug. 03, 2021 EUR (€)	Jul. 13, 2021 EUR (€)	May 01, 2021 USD ($)	May 01, 2020 USD ($)	Feb. 29, 2020 USD ($) $ / shares shares	Dec. 31, 2022 EUR (€)	Oct. 31, 2022 USD ($) shares	Oct. 31, 2021 EUR (€)	Jun. 30, 2021 USD ($)	Jan. 31, 2021 EUR (€)	Nov. 30, 2020 USD ($) Note	Oct. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares	Apr. 30, 2018 USD ($)	Dec. 08, 2022 USD ($) TradingDay $ / shares shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2022 EUR (€) shares	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2020 USD ($)	Jan. 01, 2023 USD ($)	May 04, 2023 shares	Dec. 31, 2022 EUR (€)	Dec. 06, 2022 USD ($)	Sep. 30, 2022 USD ($)	Oct. 01, 2021 EUR (€)	Feb. 28, 2021 USD ($)	Jul. 31, 2019 USD ($)	Jun. 01, 2019 USD ($)	Apr. 01, 2018 USD ($)
Debt Instrument [Line Items]
Interest rate per month					0.12%
Debt discount																				$ 581,000
Interest expense																		$ 127,000	€ 120	46,000	€ 40
Prepaid Expense																		116,000		699,000
Long-Term Debt																		4,409,000
Cash and cash equivalents																		64,294,000		62,516,000
Warrants and Rights Outstanding																		247,000		48,504,000
Amortization of debt issuance costs																		4,609,000		978,000
Company's equity interests																		69,500,000		(401,221,000)
Gain on debt extinguishment																				7,017,000
Current portion of long term debt																		1,200,000							€ 1,100
Non current portion of long term debt																		4,400,000							€ 4,100
Number of private placement warrants agreed to purchase | shares	110,652																110,652
Braemar Energy Ventures III LP [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Amortization of Debt Discount (Premium)									$ 1,500,000									100,000
Interest expense																		20,000
Notes issued									$ 2,000,000.0																	$ 2,500,000
Interest Rate, Effective Percentage									10.00%
Gain on debt extinguishment																		$ (1,900,000)
Debt instrument frequency of periodic payment																		annually	annually
Debt instrument payment terms																		the principal and any accrued but unpaid interest will be due and payable upon holder demand at any time on or after October 30, 2023.	the principal and any accrued but unpaid interest will be due and payable upon holder demand at any time on or after October 30, 2023.
Threshold amount used to calculate prepayment premium									$ 200,000
Common stock, shares issued | shares									200,000
Minimum of new equity investment									$ 2,000,000.0
Debt instrument principal and accrued interest																										$ 2,000,000.0
iHeart Media Note Payable [Member]
Debt Instrument [Line Items]
Interest rate per month																																1.50%
Maximum increase in interest rate of the event																8.00%
Debt Instrument, Term																5 years
proceeds from sale of equity securities																$ 50,000,000.0
Notes issued	$ 400,000																$ 400,000
Debt Instrument, Increase, Accrued Interest	$ 12,000
Exchanged shares of common stock | shares	32,329																32,329
iHeart Media Note Payable [Member] | Series D Preferred Stock [Member]
Debt Instrument [Line Items]
Notes issued															$ 1,100,000
Debt Instrument, Increase, Accrued Interest															$ 16,000
Debt Conversion, Converted Instrument, Shares Issued | shares															36,098
iHeart Media Note Payable [Member] | Series E Preferred Stock [Member]
Debt Instrument [Line Items]
Notes issued														$ 2,000,000.0
Debt Instrument, Increase, Accrued Interest														$ 54,000
Debt Conversion, Converted Instrument, Shares Issued | shares														169,156
iHeart Media Note Payable [Member] | Legacy Series E Preferred Stock [Member]
Debt Instrument [Line Items]
Debt Conversion, Converted Instrument, Shares Issued | shares	32,329
2021 Convertible Promissory Notes
Debt Instrument [Line Items]
Interest expense																		$ 0		0
Notes issued					$ 29,400,000
Debt Conversion, Original Debt, Due Date of Debt, Month and Year					2023-11
Debt Conversion, Converted Instrument, Shares Issued | shares	3,467,402
Convertible promissory note fair value adjustment																		6,700,000
Deutsche Bank Loan [Member]
Debt Instrument [Line Items]
Amortization of Debt Discount (Premium)		$ 700,000																400,000		94,000
Interest expense																		$ 7,300,000		1,800,000
Notes issued		$ 75,000,000.0
Debt Instrument, Maturity Date		Oct. 07, 2023
Interest Rate, Effective Percentage																		13.90%							13.90%		11.57%
Debt Instrument, Fee Amount		$ 3,400,000							$ 3,400,000																		$ 4,100,000
Debt Instrument, Annual Principal Payment		25,000,000.0
Interest Costs Capitalized		600,000
Amortization of debt issuance costs																		$ 300,000		86,000
Debt Instrument, Increase, Accrued Interest																				500,000
Debt instrument payment terms																		The loan agreement requires mandatory repayments if either 1) an acceptable SPAC transaction or acceptable Primary Equity Issuance with a valuation of the Company’s equity interests of at least $1.0 billion isn’t consummated on or prior to September 30, 2022 or 2) if the last twelve months (“LTM”) Net Revenue is below a certain threshold. Upon either event, the Company is required to repay 4.17% of the principal amount outstanding as of the date of the breach payable monthly on the first business day of the immediately following month and continuing until the maturity date. Subsequent compliance after the initial breach will not alter the monthly mandatory repayment obligation.	The loan agreement requires mandatory repayments if either 1) an acceptable SPAC transaction or acceptable Primary Equity Issuance with a valuation of the Company’s equity interests of at least $1.0 billion isn’t consummated on or prior to September 30, 2022 or 2) if the last twelve months (“LTM”) Net Revenue is below a certain threshold. Upon either event, the Company is required to repay 4.17% of the principal amount outstanding as of the date of the breach payable monthly on the first business day of the immediately following month and continuing until the maturity date. Subsequent compliance after the initial breach will not alter the monthly mandatory repayment obligation.
Horizon Loan [Member]
Debt Instrument [Line Items]
Debt discount																				600,000
Amortization of Debt Discount (Premium)																				800,000
Interest expense																				4,100,000
Notes issued													$ 18,000,000.0
Interest Rate, Effective Percentage																		13.88%							13.88%
Line of Credit Facility, Current Borrowing Capacity													3,500,000																$ 7,000,000.0
Line of Credit Facility, Maximum Borrowing Capacity													$ 25,000,000.0
Number of current borrowing capacity available | Note													2
Class of warrants or rights warrants issued during the period units | shares							208,498
Class of warrants or rights warrants issued issue price per warrant | $ / shares							$ 1.16
Warrants and Rights Outstanding							$ 200,000
Debt Instrument, Periodic Payment																		$ 1,100,000		1,100,000
Debt Instrument, Fee Amount		$ 1,900,000																		$ 800,000
Debt Instrument, Repurchase Date																				Oct. 08, 2021	Oct. 08, 2021
Debt Instrument, Date of First Required Payment																		Dec. 01, 2024	Dec. 01, 2024
Horizon Loan [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Interest rate per month																							10.50%
Notes issued																							$ 1,000,000.0
Debt Instrument, Maturity Date																							Dec. 01, 2024
Paycheck Protection Program (PPP) [Member]
Debt Instrument [Line Items]
Interest rate per month						1.00%
Debt Instrument, Maturity Date						Apr. 30, 2022
Debt Instrument, Fee Amount						$ 6,900,000
Gain on debt extinguishment											$ 7,000,000.0
Prêt Garanti par l'État Loan [member] | Covid Nineteen [Member]
Debt Instrument [Line Items]
Notes issued													$ 4,500,000
Prêt Garanti par l'État Loan [member] | Covid Nineteen [Member] | Tranche One [Member]
Debt Instrument [Line Items]
Notes issued													3,000,000.0
Prêt Garanti par l'État Loan [member] | Covid Nineteen [Member] | Tranche Two [Member]
Debt Instrument [Line Items]
Notes issued													1,500,000
Debt Instrument, Annual Principal Payment													$ 300,000
Long term debt month of maturity commencement													2021-09
Long term debt month of maturity end													2025-09
Long term debt bearing fixed interest rate													2.25%
Prêt Garanti par l'État Loan [member] | Covid Nineteen [Member] | Amendement One To The Loan Agreement [Member]
Debt Instrument [Line Items]
Additional guarantee commission loan expense to french government | €								€ 51
Prêt Garanti par l'État Loan [member] | Covid Nineteen [Member] | Amendement One To The Loan Agreement [Member] | Tranche One [Member]
Debt Instrument [Line Items]
Notes issued				€ 3,000									$ 3,000,000.0												€ 3,000
Long term debt month of maturity commencement				2021-11
Long term debt month of maturity end				2022-11
Prêt Garanti par l'État Loan [member] | Covid Nineteen [Member] | Amendement One To The Loan Agreement [Member] | Tranche One [Member] | SubTranche One [Member]
Debt Instrument [Line Items]
Notes issued | €			€ 600
Long term debt month of maturity commencement			2022-12
Long term debt month of maturity end			2026-11
Long Term Debt Additional Fixed Interest Rate			0.70%
Debt instrument monthly payment of principal | €			€ 12
Prêt Garanti par l'État Loan [member] | Covid Nineteen [Member] | Amendement One To The Loan Agreement [Member] | Tranche One [Member] | Sub Tranche Two [Member]
Debt Instrument [Line Items]
Notes issued | €																												€ 2,400
Long term debt month of maturity commencement										2022-11
Long term debt month of maturity end										2026-11
Debt instrument additional effective rate of interest		1.44%
Debt instrument monthly payment of principal | €										€ 49
Prêt Garanti par l'État Loan [member] | Covid Nineteen [Member] | Amendement One To The Loan Agreement [Member] | Tranche Two [Member]
Debt Instrument [Line Items]
Notes issued | €												€ 1,500													€ 75
Long term debt month of maturity commencement												2021-09
Long term debt month of maturity end												2026-06
Bridge Loans [Member] | Convertible Subordinated Debt [Member]
Debt Instrument [Line Items]
Interest expense																		$ 0
Notes issued																		$ 50,000,000.0
Debt Instrument, Maturity Date																		May 01, 2024	May 01, 2024
Interest Rate, Effective Percentage																		1.85%							1.85%
Debt Instrument, Fee Amount																		$ 38,100,000
Debt Conversion, Converted Instrument, Shares Issued | shares																	5,400,542
Convertible promissory note fair value adjustment																		10,100,000
Debt instrument percentage of conversion price								70.00%
Bridge Loans [Member] | Braemar Energy Ventures III LP [Member]
Debt Instrument [Line Items]
Notes issued																		5,000,000.0
Mudrick Convertible Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Convertible, Conversion Ratio																	86.96
Proceeds from Convertible Debt																		$ 169,800,000
Notes issued	$ 175,000,000																$ 175,000,000
Debt instrument principal amount denomination for conversion into common stock																	$ 1,000
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger																	115.00%
Debt Instrument, Convertible, Threshold Trading Days | TradingDay																	90
Debt Instrument, Convertible, Stock Price Trigger | $ / shares																	$ 9.21
Additional shares of common stock | shares																		266,156	266,156
Repurchase of notes principal amount																		$ 1,000
Description of notice of default																		On June 23, 2023, the Company received written notice from U.S. Bank Trust Company, National Association, in its capacity as trustee under the indenture governing the Mudrick Convertible Notes, for its failure to comply with the covenant of timely filing the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022. As of August 23, 2023, the cure period for such default expired and the Company had not yet filed its Form 10-K. In lieu of acceleration of the repayment obligation as a result of such event of default, the Company elected to pay additional interest on the notes at a rate per annum equal to (a) one quarter of one percent (0.25%) of the principal amount for the first ninety (90) days during which the event of default continues, and, thereafter, (b) one half of one percent (0.50%) of the principal amount for the ninety first (91st) through the one hundred and eightieth (180th) day during which the event of default continues, provided, however, that in no event will any such special interest accrue on any day at a combined rate per annum that exceeds one half of one percent (0.50%).	On June 23, 2023, the Company received written notice from U.S. Bank Trust Company, National Association, in its capacity as trustee under the indenture governing the Mudrick Convertible Notes, for its failure to comply with the covenant of timely filing the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022. As of August 23, 2023, the cure period for such default expired and the Company had not yet filed its Form 10-K. In lieu of acceleration of the repayment obligation as a result of such event of default, the Company elected to pay additional interest on the notes at a rate per annum equal to (a) one quarter of one percent (0.25%) of the principal amount for the first ninety (90) days during which the event of default continues, and, thereafter, (b) one half of one percent (0.50%) of the principal amount for the ninety first (91st) through the one hundred and eightieth (180th) day during which the event of default continues, provided, however, that in no event will any such special interest accrue on any day at a combined rate per annum that exceeds one half of one percent (0.50%).
Debt instrument additional effective rate of interest	2.00%																2.00%
Debt instrument conversion price | $ / shares	$ 11.50																$ 11.50
Debt Instrument, Date of First Required Payment																	Jun. 15, 2023
Debt instrument payment terms																		The Convertible Notes accrue interest payable semi-annually in arrears on December 15 and June 15 of each year, beginning on June 15, 2023, at a rate of 8.00% per annum (if paid in cash) or 9.50% per annum (if paid in-kind)	The Convertible Notes accrue interest payable semi-annually in arrears on December 15 and June 15 of each year, beginning on June 15, 2023, at a rate of 8.00% per annum (if paid in cash) or 9.50% per annum (if paid in-kind)
Maturity date																		December 8, 2027, unless earlier converted, redeemed or repurchased.	December 8, 2027, unless earlier converted, redeemed or repurchased.
Number of trading days following the closing of the private placement warrants agreed to issue to the subscriber																	100 days
Number of private placement warrants agreed to purchase | shares	2,800,000																2,800,000							7,000,000
Private placement warrant price (in Dollars per share) | $ / shares	$ 11.50																$ 11.50
Aggregate value of warrants will be exercisable for shares of common stock	$ 3,500,000																$ 3,500,000
Value Of Warrant Per Share | $ / shares	$ 1.25																$ 1.25
Number of trading days following the closing of private placement to reflect the adjusted upward or downward of weighted average price for value of warrants																	90 days
Maximum upward or downward adjustment per warrant | $ / shares	$ 0.75																$ 0.75
Minimum number of warrants obligated to issue as a result of adjustment to warrants\ | shares	1,750,000																1,750,000
Maximum number of warrants obligated to issue as a result of adjustment to warrants | shares	7,000,000																7,000,000
Value of warrants for issuing has right to pay in cash	$ 3,500,000																$ 3,500,000
Backstop fee																		$ 5,200,000
Mudrick Convertible Notes Paid in Cash [Member]
Debt Instrument [Line Items]
Interest rate per month	8.00%																8.00%
Mudrick Convertible Notes Paid in Kind [Member]
Debt Instrument [Line Items]
Interest rate per month																		9.50%							9.50%
Mudrick Convertible Notes, Event of Default for First 90 Days [Member]
Debt Instrument [Line Items]
Debt default, interest rate of principal amount																		0.25%							0.25%
Mudrick Convertible Notes, Event of Default for 91 through 180th Day [Member]
Debt Instrument [Line Items]
Debt default, interest rate of principal amount																		0.50%							0.50%
Individually Immaterial Counterparties [Member] | 2021 Convertible Promissory Notes
Debt Instrument [Line Items]
Notes issued					$ 50,000,000.0
Maximum Additional Promotion Commitment [Member] | Within 18 Months From The Effective Date [Member] | iHeart Media Note Payable [Member]
Debt Instrument [Line Items]
Notes issued																																$ 11,500,000
Percentage of commitment value in cash																																22.50%
Minimum Commitment Tranche [Member] | iHeart Media Note Payable [Member]
Debt Instrument [Line Items]
Notes issued																														$ 400,000	$ 1,500,000
Prepaid Expense																															$ 500,000
Long-Term Debt																		$ 100,000		$ 100,000
Minimum Commitment Tranche [Member] | Advertising [Member] | iHeart Media Note Payable [Member]
Debt Instrument [Line Items]
Debt instrument, amount utilized																				3,300,000
Initial Promotion Commitment Tranche [Member] | iHeart Media Note Payable [Member]
Debt Instrument [Line Items]
Proceeds from Convertible Debt																1,500,000
Minimum commitment tranche																																$ 3,500,000
Prepaid Expense																																600,000
Debt discount																																49,000
Amortization of Debt Discount (Premium)																						$ 33,000
Interest expense																		$ 5,000		$ 6,000
Additional Promotion Commitment Tranche [Member] | Within 18 Months From The Effective Date [Member] | iHeart Media Note Payable [Member]
Debt Instrument [Line Items]
Proceeds from Convertible Debt																$ 2,000,000.0
Minimum commitment tranche																																3,500,000
Prepaid Expense																																$ 500,000
Minimum [Member] | 2021 Convertible Promissory Notes
Debt Instrument [Line Items]
Debt Instrument, Convertible, Conversion Ratio					80
Minimum [Member] | Mudrick Convertible Notes, No Event of Default Exceeds One Half of One Percent [Member]
Debt Instrument [Line Items]
Debt default, interest rate of principal amount																		0.50%							0.50%
Maximum [Member]
Debt Instrument [Line Items]
Cash and cash equivalents																		$ 10,000,000.0
Maximum [Member] | 2021 Convertible Promissory Notes
Debt Instrument [Line Items]
Debt Instrument, Convertible, Conversion Ratio					85
Maximum [Member] | Prêt Garanti par l'État Loan [member] | Covid Nineteen [Member]
Debt Instrument [Line Items]
Long term debt period of maturity																		6 years							6 years
If equity goes below the threshold limit [Member] | Deutsche Bank Loan [Member]
Debt Instrument [Line Items]
Company's equity interests																		$ 1,000,000,000.0
If the last twelve months (LTM) Net Revenue is below a certain threshold [Member] | Deutsche Bank Loan [Member]
Debt Instrument [Line Items]
Percentage of repayment in principal amount outstanding																		4.17%							4.17%
Mandatory repayment term one [Member] | Deutsche Bank Loan [Member]
Debt Instrument [Line Items]
Percentage of repayment shall be applied pro rata basis																		100.00%	100.00%
Repayments of Long-Term Debt																		$ 40,000,000.0
Mandatory repayment term one [Member] | Maximum [Member] | Deutsche Bank Loan [Member]
Debt Instrument [Line Items]
Company's equity interests																		$ 1,000,000,000.0
Mandatory repayment term two [Member] | Deutsche Bank Loan [Member]
Debt Instrument [Line Items]
Percentage of repayment shall be applied pro rata basis																		100.00%	100.00%
Mandatory repayment term five [Member] | Deutsche Bank Loan [Member]
Debt Instrument [Line Items]
Percentage of repayment shall be applied pro rata basis																		100.00%	100.00%
Threshold limit on proceeds from any recovery event																		$ 1,000,000.0
Mandatory repayment not required if replace or restore any properties or assets during the period																		180 days	180 days
Threshold days required to utilised the net cash proceeds received																		180 days	180 days
Debt insstrument, Principal balance [Member] | Paycheck Protection Program (PPP) [Member]
Debt Instrument [Line Items]
Debt Instrument, Decrease, Forgiveness											6,900,000
Debt instrument, Accrued Interest [Member] | Paycheck Protection Program (PPP) [Member]
Debt Instrument [Line Items]
Debt Instrument, Decrease, Forgiveness											$ 79,000
Series E warrants [Member] | Horizon Loan [Member]
Debt Instrument [Line Items]
Class of warrants or rights warrants issued during the period units | shares																	107,724
Debt Conversion, Converted Instrument, Shares Issued | shares																	107,724
Debt Instrument, Redemption, Period One [Member] | Deutsche Bank Loan [Member]
Debt Instrument [Line Items]
Interest rate per month		10.00%
Debt Instrument, Redemption, Period Two [Member] | Deutsche Bank Loan [Member]
Debt Instrument [Line Items]
Interest rate per month		11.00%
Debt Instrument, Redemption, Period Three [Member] | Deutsche Bank Loan [Member]
Debt Instrument [Line Items]
Interest rate per month		12.00%
Percentage of repayment shall be applied pro rata basis																		100.00%	100.00%
Threshold limit on sale of any asset per transaction or series of related transactions																		$ 1,000,000.0
Threshold limit on sale of any asset or series of related transactions during the period																		$ 5,000,000.0
Threshold days required to purchase assets, other than inventory and working capital on net sale proceeds																		180 days	180 days