Liquidity and Capital Resources and Going Concern (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Sep. 26, 2023	Nov. 11, 2022
Debt Instrument [Line Items]
Accumulated deficit	$ (4,006,716)		$ (3,958,499)
Cash	407	$ 31,769	1,898
Working capital	(175,200)
Related Party
Debt Instrument [Line Items]
Interest expense	5,094	$ 0
Related party notes – China | Related Party
Debt Instrument [Line Items]
Interest expense	17,400		$ 800
Chongqing Leshi Small Loan Co., Ltd. | Related Party Notes, China, Due On Demand | Related Party
Debt Instrument [Line Items]
Breach of agreement	7,600
Standby Equity Purchase Agreement
Debt Instrument [Line Items]
Standby equity purchase agreement, term					3 years
Option to increase commitment amount					$ 350,000
Class A Common Stock | Standby Equity Purchase Agreement
Debt Instrument [Line Items]
Commitment amount	342,500				$ 200,000
Sale of stock, additional commitment amount	192,500
Class A Common Stock | Sales Agreement | Sales Agents
Debt Instrument [Line Items]
Commitment amount				$ 90,000
SPA Notes | Committed Debt
Debt Instrument [Line Items]
Aggregate principal	554,500
Debt instrument, funded	343,200
Debt instrument, to be funded	211,300
Debt instrument, outstanding	93,600
SPA Notes | Optional Debt
Debt Instrument [Line Items]
Aggregate principal	366,000
Debt instrument, funded	40,600
Debt instrument, to be funded	325,400
Debt instrument, outstanding	$ 3,000