Fair Value Measurements - Level 3 Fair Value Measurements Inputs (Details) - Level 3	Sep. 30, 2021 Y $ / shares	Dec. 31, 2020 $ / shares Y
Volatility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input	11.0
Volatility | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input		23
Volatility | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input		29
Share price.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input | $ / shares	9.95	10.41
Risk-free rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input	1.06	0.43
Dividend yield
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input	0	0.0
Expected life (years)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input | Y	5.5	5.5