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Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Assets:    
Money market funds, included in cash and cash equivalents $ 6,075 $ 16,498
Fixed income mutual funds, included in short-term investments 70,804 96,397
Total 76,879 112,895
(Level 1)    
Assets:    
Money market funds, included in cash and cash equivalents 6,075 16,498
Fixed income mutual funds, included in short-term investments 70,804 96,397
Total 76,879 112,895
(Level 2)    
Assets:    
Money market funds, included in cash and cash equivalents 0 0
Fixed income mutual funds, included in short-term investments 0 0
Total 0 0
(Level 3)    
Assets:    
Money market funds, included in cash and cash equivalents 0 0
Fixed income mutual funds, included in short-term investments 0 0
Total $ 0 $ 0