Investments and Fair Value Measurements - Available-for-sale securities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Available for sale securities:
Amortized Cost	$ 89,125	$ 303,557
Gross Unrealized Gains	4	12
Gross Unrealized Losses	(69)	(27)
Estimated Fair Value	89,060	303,542
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]
Estimated Fair Value lesser than 12 months	57,880	37,280
Fair value of assets transferred from Level 1 to Level 2	0
Fair value of assets transferred from Level 2 to Level 1	0
Estimated Fair Value Total	57,880	37,280
Gross unrealized lesser than 12 months	(69)	(27)
Gross unrealized loss, Total	(69)	(27)
Marketable securities
Available for sale securities:
Amortized Cost	62,946	83,049
Gross Unrealized Gains	4	12
Gross Unrealized Losses	(69)	(27)
Estimated Fair Value	62,881	83,034
U.S. government securities
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]
Estimated Fair Value lesser than 12 months	29,819
Estimated Fair Value Total	29,819
Gross unrealized lesser than 12 months	(29)
Gross unrealized loss, Total	(29)
U.S. government securities | Quoted Prices in Active Markets for Identical Assets, Level 1
Available for sale securities:
Amortized Cost	29,848	24,873
Gross Unrealized Gains		8
Gross Unrealized Losses	(29)
Estimated Fair Value	29,819	24,881
U.S. corporate notes
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]
Estimated Fair Value lesser than 12 months	23,641
Estimated Fair Value Total	23,641
Gross unrealized lesser than 12 months	(32)
Gross unrealized loss, Total	(32)
U.S. corporate notes | Significant Other Observable Inputs, Level 2
Available for sale securities:
Amortized Cost	28,670
Gross Unrealized Gains	4
Gross Unrealized Losses	(32)
Estimated Fair Value	28,642
U.S. commercial paper
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]
Estimated Fair Value lesser than 12 months		37,280
Estimated Fair Value Total		37,280
Gross unrealized lesser than 12 months		(27)
Gross unrealized loss, Total		(27)
U.S. commercial paper | Significant Other Observable Inputs, Level 2
Available for sale securities:
Amortized Cost		37,307
Gross Unrealized Losses		(27)
Estimated Fair Value		37,280
U.S. government agency securities
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]
Estimated Fair Value lesser than 12 months	4,420
Estimated Fair Value Total	4,420
Gross unrealized lesser than 12 months	(8)
Gross unrealized loss, Total	(8)
U.S. government agency securities | Significant Other Observable Inputs, Level 2
Available for sale securities:
Amortized Cost	4,428	20,869
Gross Unrealized Gains		4
Gross Unrealized Losses	(8)
Estimated Fair Value	4,420	20,873
Money market funds | Quoted Prices in Active Markets for Identical Assets, Level 1
Available for sale securities:
Amortized Cost	26,179	220,508
Estimated Fair Value	$ 26,179	$ 220,508