Fair Value Measurements - Marketable Debt Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	$ 96,051	$ 99,601
Gross Unrealized Gains	0	229
Gross Unrealized Losses	(6,047)	(4,630)
Estimated Fair Value	90,004	95,200
Credit Impairment Losses	0	0
Municipal bonds — available-for-sale
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	96,051	99,601
Gross Unrealized Gains	0	229
Gross Unrealized Losses	(6,047)	(4,630)
Estimated Fair Value	90,004	95,200
Credit Impairment Losses	$ 0	$ 0