Assets - Available-For-Sale Securities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Total available-for-sale securities
Amortized Cost	$ 130,943		$ 146,775
Gross Unrealized Gains			18
Gross Unrealized Losses	(247)		(129)
Estimated Fair Value	130,696		146,664
Available-for-sale securities in a loss position
Investments, Continuous loss position for less than 12 months, Estimated Fair Value	123,387		101,265
Investments, Continuous loss position for less than 12 months, Gross Unrealized Losses	(243)		(114)
Investments, Continuous loss position for 12 months or more, Estimated Fair Value	6,723		2,618
Investments, Continuous loss position for 12 months or more, Gross Unrealized Losses	(4)		(15)
Contractual maturities - Amortized Cost
Amortized Cost, Due in one year or less	129,427
Amortized Cost, Due after one year through two years	1,516
Amortized Cost	130,943		146,775
Contractual maturities - Estimated Fair Value
Estimated Fair Value, Due in one year or less	129,190
Estimated Fair Value, Due after one year through two years	1,506
Available-for-sale Securities, Debt Securities, Total	130,696		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	58,541		59,541
Gross Unrealized Gains			3
Gross Unrealized Losses	(103)		(51)
Estimated Fair Value	58,438		59,493
Available-for-sale securities in a loss position
Investments, Continuous loss position for less than 12 months, Estimated Fair Value	58,438		43,118
Investments, Continuous loss position for less than 12 months, Gross Unrealized Losses	(103)		(50)
Contractual maturities - Amortized Cost
Amortized Cost	58,541		59,541
Contractual maturities - Estimated Fair Value
Available-for-sale Securities, Debt Securities, Total	58,438		59,493
Government agency securities
Total available-for-sale securities
Amortized Cost	18,095		41,843
Gross Unrealized Gains			6
Gross Unrealized Losses	(27)		(31)
Estimated Fair Value	18,068		41,818
Available-for-sale securities in a loss position
Investments, Continuous loss position for less than 12 months, Estimated Fair Value	11,345		34,885
Investments, Continuous loss position for less than 12 months, Gross Unrealized Losses	(23)		(31)
Investments, Continuous loss position for 12 months or more, Estimated Fair Value	6,723
Investments, Continuous loss position for 12 months or more, Gross Unrealized Losses	(4)
Contractual maturities - Amortized Cost
Amortized Cost	18,095		41,843
Contractual maturities - Estimated Fair Value
Available-for-sale Securities, Debt Securities, Total	18,068		41,818
Corporate debt
Total available-for-sale securities
Amortized Cost	54,307		35,447
Gross Unrealized Gains			9
Gross Unrealized Losses	(117)		(47)
Estimated Fair Value	54,190		35,409
Available-for-sale securities in a loss position
Investments, Continuous loss position for less than 12 months, Estimated Fair Value	53,604		23,262
Investments, Continuous loss position for less than 12 months, Gross Unrealized Losses	(117)		(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	54,307		35,447
Contractual maturities - Estimated Fair Value
Available-for-sale Securities, Debt Securities, Total	$ 54,190		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