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Cash, Cash Equivalents and Short-Term Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023
Cash, Cash Equivalents and Short-Term Investments
Cash	$ 39,344	$ 34,003
Cash equivalents:
Money market mutual fund	216,467	134
Total cash and cash equivalents	255,811	34,137	$ 31,366	$ 35,192
Short-term investments:
Total short-term investments	165,503	216,460
Cash, cash equivalents and short-term investments	421,314	250,597
U.S. Treasury notes and bills
Short-term investments:
Total short-term investments	24,656	41,948
Mutual funds
Short-term investments:
Total short-term investments	99,338	97,675
Corporate debt securities
Short-term investments:
Total short-term investments	$ 41,509	$ 76,837