Assets - Available-For-Sale Securities (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Dec. 31, 2023
Total available-for-sale securities
Amortized Cost	$ 157,423	$ 157,423	$ 146,775
Gross Unrealized Gains	174	174	18
Gross Unrealized Losses	(63)	(63)	(129)
Estimated Fair Value	157,534	157,534	146,664
Available-for-sale securities in a loss position
Investments, Continuous loss position for less than 12 months, Estimated Fair Value	69,742	69,742	101,265
Investments, Continuous loss position for less than 12 months, Gross Unrealized Losses	(63)	(63)	(114)
Investments, Continuous loss position for 12 months or more, Estimated Fair Value			2,618
Investments, Continuous loss position for 12 months or more, Gross Unrealized Losses			(15)
Contractual maturities - Amortized Cost
Amortized Cost, Due in one year or less	145,355	145,355
Amortized Cost, Due after one year through two years	12,068	12,068
Amortized Cost	157,423	157,423	146,775
Contractual maturities - Estimated Fair Value
Estimated Fair Value, Due in one year or less	145,489	145,489
Estimated Fair Value, Due after one year through two years	12,045	12,045
Available-for-sale Securities, Debt Securities, Total	157,534	157,534	146,664
Realized gains or losses
Realized gains or losses	0	0
Unrealized losses	0	0
U.S. treasuries
Total available-for-sale securities
Amortized Cost	71,317	71,317	59,541
Gross Unrealized Gains	86	86	3
Gross Unrealized Losses	(10)	(10)	(51)
Estimated Fair Value	71,393	71,393	59,493
Available-for-sale securities in a loss position
Investments, Continuous loss position for less than 12 months, Estimated Fair Value	37,809	37,809	43,118
Investments, Continuous loss position for less than 12 months, Gross Unrealized Losses	(10)	(10)	(50)
Contractual maturities - Amortized Cost
Amortized Cost	71,317	71,317	59,541
Contractual maturities - Estimated Fair Value
Available-for-sale Securities, Debt Securities, Total	71,393	71,393	59,493
Government agency securities
Total available-for-sale securities
Amortized Cost	18,752	18,752	41,843
Gross Unrealized Gains	26	26	6
Gross Unrealized Losses	(21)	(21)	(31)
Estimated Fair Value	18,757	18,757	41,818
Available-for-sale securities in a loss position
Investments, Continuous loss position for less than 12 months, Estimated Fair Value	7,238	7,238	34,885
Investments, Continuous loss position for less than 12 months, Gross Unrealized Losses	(21)	(21)	(31)
Contractual maturities - Amortized Cost
Amortized Cost	18,752	18,752	41,843
Contractual maturities - Estimated Fair Value
Available-for-sale Securities, Debt Securities, Total	18,757	18,757	41,818
Corporate debt
Total available-for-sale securities
Amortized Cost	67,354	67,354	35,447
Gross Unrealized Gains	62	62	9
Gross Unrealized Losses	(32)	(32)	(47)
Estimated Fair Value	67,384	67,384	35,409
Available-for-sale securities in a loss position
Investments, Continuous loss position for less than 12 months, Estimated Fair Value	24,695	24,695	23,262
Investments, Continuous loss position for less than 12 months, Gross Unrealized Losses	(32)	(32)	(33)
Investments, Continuous loss position for 12 months or more, Estimated Fair Value			2,618
Investments, Continuous loss position for 12 months or more, Gross Unrealized Losses			(15)
Contractual maturities - Amortized Cost
Amortized Cost	67,354	67,354	35,447
Contractual maturities - Estimated Fair Value
Available-for-sale Securities, Debt Securities, Total	$ 67,384	$ 67,384	35,409
Commercial paper
Total available-for-sale securities
Amortized Cost			9,944
Estimated Fair Value			9,944
Contractual maturities - Amortized Cost
Amortized Cost			9,944
Contractual maturities - Estimated Fair Value
Available-for-sale Securities, Debt Securities, Total			$ 9,944