Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value Measurements
Short-term investments (U.S. Government Securities and Agency Investments)	$ 338,851	$ 246,571
Recurring | Estimate of fair value measurement
Fair Value Measurements
Total	457,518	382,018
Recurring | Money market funds, U.S. Government Securities and Agency Investments | Estimate of fair value measurement
Fair Value Measurements
Cash equivalents (money market funds, U.S. Government Securities and Agency Investments)	118,278	136,771
Recurring | U.S. Government Securities and Agency Investments | Estimate of fair value measurement
Fair Value Measurements
Short-term investments (U.S. Government Securities and Agency Investments)	339,240	245,247
Recurring | Level 1
Fair Value Measurements
Total	457,518	357,018
Recurring | Level 1 | Money market funds, U.S. Government Securities and Agency Investments
Fair Value Measurements
Cash equivalents (money market funds, U.S. Government Securities and Agency Investments)	118,278	111,771
Recurring | Level 1 | U.S. Government Securities and Agency Investments
Fair Value Measurements
Short-term investments (U.S. Government Securities and Agency Investments)	$ 339,240	245,247
Recurring | Level 2
Fair Value Measurements
Total		25,000
Recurring | Level 2 | Money market funds, U.S. Government Securities and Agency Investments
Fair Value Measurements
Cash equivalents (money market funds, U.S. Government Securities and Agency Investments)		$ 25,000