Notes Payable - Secured SPA Notes Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Aug. 02, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Jan. 28, 2025	Dec. 31, 2024	Dec. 21, 2024	Sep. 05, 2024
Notes Payable
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt			$ (2,699)		$ (2,699)
Gain (loss) on fair value adjustment of debts		$ 18,074	14,881	$ 31,131	35,690
2023 Unsecured Convertible Note | Notes Payable
Debt Instrument [Line Items]
Debt instrument, term (in years)				6 years
Notes payable		$ 7,500		$ 7,500			$ 6,700
Percent of purchaser's conversion shares		33.00%		33.00%
Proceeds from debt, net of issuance costs		$ 4,500	0	$ 9,000	0
Debt conversion, converted amount		$ 1,900	$ 12,100	$ 6,300	$ 12,500
Shares issued from conversion (in shares)		1,622,455	3,658,727	5,790,219	3,782,135
Gain (loss) on extinguishment of debt			$ 2,394		$ 2,394
Gain (loss) on fair value adjustment of debts		$ (212)	2,355	$ 1,773	3,570
2023 Unsecured Convertible Note | Notes Payable | Class A Common Stock
Debt Instrument [Line Items]
Debt instrument, fixed conversion price percentage				90.00%
Gain (loss) on extinguishment of debt		$ (400)	$ (7,600)	$ (3,200)	$ (7,800)
Secured SPA Notes | Notes Payable
Debt Instrument [Line Items]
Debt instrument, fixed conversion price percentage				90.00%
Conversion price (in dollars per share)		$ 1.16	$ 29.33	$ 1.16	$ 29.33
Debt instrument, term (in years)				6 years
Notes payable		$ 0		$ 0			$ 5,500
Proceeds from debt, net of issuance costs			$ 1,100	0	$ 8,500
Debt conversion, converted amount			$ 49,800	$ 3,100	$ 83,100
Shares issued from conversion (in shares)			15,453,305	3,164,911	25,335,671
Gain (loss) on extinguishment of debt		0	$ (5,158)		$ (5,158)
Gain (loss) on fair value adjustment of debts		$ 0	8,408	$ 1,922	$ 30,666
Secured SPA Notes | Notes Payable | Class A Common Stock
Debt Instrument [Line Items]
Redemption price, percentage					105.00%
Gain (loss) on extinguishment of debt			(48,900)	$ (300)	$ (107,000)
Secured SPA Notes | Notes Payable | Metaverse Horizon Limited and V W Investment Holding Limited
Debt Instrument [Line Items]
Percent of purchaser's conversion shares		33.00%		33.00%
SPA Notes | Notes Payable
Debt Instrument [Line Items]
Conversion price (in dollars per share)	$ 29.33
SPA Notes | Notes Payable | Class A Common Stock
Debt Instrument [Line Items]
Redemption price, percentage	90.00%
Junior Secured SPA Notes | Notes Payable
Debt Instrument [Line Items]
Contractual Interest Rates									10.00%
Conversion price (in dollars per share)		$ 1.16		$ 1.16		$ 5.24		$ 1.16	$ 5.24
Debt instrument, term (in years)				1 year
Proceeds from debt, net of issuance costs		$ 18,000	13,300	$ 18,000	13,300
Gain (loss) on extinguishment of debt			0		0
Gain (loss) on fair value adjustment of debts		(106)	$ 4,004	9,485	$ 4,004
Junior Secured SPA Notes | Notes Payable | Class A Common Stock
Debt Instrument [Line Items]
Debt conversion, converted amount		$ 0		$ 28,800
Shares issued from conversion (in shares)		0		27,412,545
Gain (loss) on extinguishment of debt		$ 0		$ (20,400)
2024 Unsecured SPA Notes
Debt Instrument [Line Items]
Debt instrument, term (in years)				5 years
2024 Unsecured SPA Notes | Notes Payable
Debt Instrument [Line Items]
Contractual Interest Rates		10.00%		10.00%			10.00%
Conversion price (in dollars per share)		$ 1.16		$ 1.16		$ 1.16		$ 1.16
Debt instrument, term (in years)				1 year
Proceeds from debt, net of issuance costs		$ 14,000		$ 34,000
Gain (loss) on fair value adjustment of debts		6,233		8,505
2024 Unsecured SPA Notes | Notes Payable | Class A Common Stock
Debt Instrument [Line Items]
Debt conversion, converted amount		$ 23,200		$ 34,900
Shares issued from conversion (in shares)		20,894,171		31,690,932
Gain (loss) on extinguishment of debt		$ (36,300)		$ (45,600)
Minimum | 2023 Unsecured Convertible Note | Notes Payable
Debt Instrument [Line Items]
Contractual Interest Rates		10.00%		10.00%			10.00%
Minimum | Secured SPA Notes | Notes Payable
Debt Instrument [Line Items]
Contractual Interest Rates		10.00%		10.00%			10.00%
Maximum | 2023 Unsecured Convertible Note | Notes Payable
Debt Instrument [Line Items]
Contractual Interest Rates		15.00%		15.00%			15.00%
Maximum | Secured SPA Notes | Notes Payable
Debt Instrument [Line Items]
Contractual Interest Rates		15.00%		15.00%			15.00%