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Fair Value Measurements and Fair Value of Financial Instruments - Additional Information (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
USD ($)
Security
Sep. 30, 2021
USD ($)
Security
Dec. 31, 2020
USD ($)
Security
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]      
Fair value assets transferred from level 1 to level 2 $ 0 $ 0 $ 0
Fair value assets transferred from level 2 to level 1 0 0 0
Fair value liabilities transferred from level 1 to level 2 0 0 0
Fair value liabilities transferred from level 2 to level 1 0 0 0
Fair value assets transferred into level 3 0 0 0
Fair value assets transferred out of level 3 0 0 0
Fair value liabilities transferred into level 3 0 0 0
Fair value liabilities transferred out of level 3 $ 0 $ 0 $ 0
Level 3      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]      
Number of securities | Security 0 0 0