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Fair Value Measurements - Narrative (Details) - shares
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Conversion probability percentage 50.00% 99.00%  
Redeemable convertible preferred stock warrants      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Warrants outstanding (in shares)     0
Minimum | Fair Value, Inputs, Level 3 | Fair Value, Recurring | Valuation Technique, Discounted Cash Flow      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt instrument measurement input 0.0007 0.017  
Minimum | Fair Value, Inputs, Level 3 | Fair Value, Recurring | Valuation Technique, Discounted Cash Flow | Measurement Input, Expected Term      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt instrument, convertible, expected timing 3 months 18 days 6 months  
Maximum | Fair Value, Inputs, Level 3 | Fair Value, Recurring | Valuation Technique, Discounted Cash Flow      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt instrument measurement input 0.122 0.115  
Maximum | Fair Value, Inputs, Level 3 | Fair Value, Recurring | Valuation Technique, Discounted Cash Flow | Measurement Input, Expected Term      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt instrument, convertible, expected timing 9 months 18 days 1 year 9 months 18 days