Fair Value Measurements - Schedule of Cost Or Amortized Cost, Gross Unrealized Gains, Gross Unrealized Losses, And Total Estimated Fair Value Of Financial Assets (Details) - Fair Value Measurements Recurring - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost or Amortized Cost	$ 95,946	$ 189,217
Gross Unrealized Gains		14
Gross Unrealized Losses	(189)	(1,263)
Total Estimated Fair Value	95,757	187,968
Money Market Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost or Amortized Cost	60,628	14,620
Total Estimated Fair Value	60,628	14,620
U.S. Government Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost or Amortized Cost	22,854	93,065
Gross Unrealized Losses	(147)	(982)
Total Estimated Fair Value	22,707	92,083
Corporate Notes and Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost or Amortized Cost	2,500	27,133
Gross Unrealized Gains		6
Gross Unrealized Losses		(186)
Total Estimated Fair Value	2,500	26,953
Yankee Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost or Amortized Cost	1,935	3,815
Gross Unrealized Losses	(15)	(7)
Total Estimated Fair Value	1,920	3,808
Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost or Amortized Cost		24,073
Total Estimated Fair Value		24,073
Treasury Bill
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost or Amortized Cost		11,361
Gross Unrealized Gains		2
Gross Unrealized Losses		(4)
Total Estimated Fair Value		11,359
Agency Bond
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost or Amortized Cost	5,973	5,863
Gross Unrealized Gains		4
Gross Unrealized Losses	(16)	(2)
Total Estimated Fair Value	5,957	5,865
Asset-Backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost or Amortized Cost	2,056	9,287
Gross Unrealized Gains		2
Gross Unrealized Losses	(11)	(82)
Total Estimated Fair Value	$ 2,045	$ 9,207