Fair Value of Financial Instruments - Financial Assets and Liabilities Remeasured on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Liabilities:
Obligation to issue registered shares of Class A Common Stock	$ 12,635	$ 0
Level 1 | Recurring
Liabilities:
Notes payable	0	0
Obligation to issue registered shares of Class A Common Stock	0
The9 Conditional Obligation		0
Level 1 | Recurring | Private Warrants
Liabilities:
Private Warrants	0
Level 1 | Recurring | Affiliated Entity
Liabilities:
Notes payable		0
Level 2 | Recurring
Liabilities:
Notes payable	0	0
Obligation to issue registered shares of Class A Common Stock	0
The9 Conditional Obligation		0
Level 2 | Recurring | Private Warrants
Liabilities:
Private Warrants	0
Level 2 | Recurring | Affiliated Entity
Liabilities:
Notes payable		0
Level 3 | Recurring
Liabilities:
Notes payable	161,282	59,742
Obligation to issue registered shares of Class A Common Stock	12,635
The9 Conditional Obligation		1,128
Level 3 | Recurring | Private Warrants
Liabilities:
Private Warrants	$ 642
Level 3 | Recurring | Affiliated Entity
Liabilities:
Notes payable		$ 32,949