Investments and Fair Value Measurement - Summary of Unobservable Inputs (Details)	9 Months Ended
	Sep. 30, 2021 $ / shares
Relative weighting | Option Pricing Model
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.40
Relative weighting | Common Stock Equivalent
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.60
Transaction price per share | Option Pricing Model
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	6.16
Volatility | Option Pricing Model
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.64
Estimated time to liquidity | Option Pricing Model
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.05
Estimated time to liquidity	1 year 3 months
Estimated time to liquidity | Common Stock Equivalent
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated time to liquidity	3 months
Discount rate | Common Stock Equivalent
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.25