Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Details)

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Fair Value Measurements - Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Details) - Fair Value Measurements Recurring - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Assets:    
Total $ 371,498 $ 330,430
Level 1    
Assets:    
Total 211,986 159,757
Level 2    
Assets:    
Total 159,512 170,673
Money Market Funds    
Assets:    
Total 56,397 36,486
Money Market Funds | Level 1    
Assets:    
Total 56,397 36,486
Commercial Paper    
Assets:    
Total 82,152 87,140
Commercial Paper | Level 2    
Assets:    
Total 82,152 87,140
Corporate Debt Securities    
Assets:    
Total 61,894 36,429
Corporate Debt Securities | Level 2    
Assets:    
Total 61,894 36,429
Equity Securities    
Assets:    
Total 41,937 32,020
Equity Securities | Level 1    
Assets:    
Total 41,937 32,020
Asset-backed Securities    
Assets:    
Total 10,505 14,016
Asset-backed Securities | Level 2    
Assets:    
Total 10,505 14,016
U.S. Government Securities    
Assets:    
Total 113,652 91,251
U.S. Government Securities | Level 1    
Assets:    
Total 113,652 91,251
U.S. Agency Securities    
Assets:    
Total 4,961 16,607
U.S. Agency Securities | Level 2    
Assets:    
Total $ 4,961 16,607
Supranational Debt Securities    
Assets:    
Total   16,481
Supranational Debt Securities | Level 2    
Assets:    
Total   $ 16,481