Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Assets (Details)

v3.21.2
Fair Value Measurements - Assets (Details) - Fair Value, Recurring - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total $ 24,385 $ 53,701
Level 1 | Money market fund    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total 24,385 53,701
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total 0 0
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total $ 0 $ 0