Fair Value Measurements - Schedule of Fair Value, Assets Measured on Recurring and Nonrecurring Basis (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	$ 74,201,000	$ 179,248,000
Gross Unrealized Gains	0	13,000
Gross Unrealized Losses	(1,486,000)	(4,452,000)
Fair Value	72,715,000	174,809,000
Accrued interest receivable	1,700,000	900,000
Realized gains (losses) on marketable securities	$ 0	$ 0	$ 0
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	$ 15,437,000	$ 56,426,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(64,000)	(651,000)
Fair Value	15,373,000	55,775,000
Yankee bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	2,601,000	5,358,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(13,000)	(92,000)
Fair Value	2,588,000	5,266,000
Agency bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	6,056,000	12,485,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(56,000)	(116,000)
Fair Value	6,000,000	12,369,000
Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	12,694,000	12,841,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(597,000)	(1,030,000)
Fair Value	12,097,000	11,811,000
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	0	2,846,000
Gross Unrealized Gains	0	8,000
Gross Unrealized Losses	0	0
Fair Value	0	2,854,000
Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	4,971,000	25,544,000
Gross Unrealized Gains	0	2,000
Gross Unrealized Losses	(37,000)	(427,000)
Fair Value	4,934,000	25,119,000
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	32,442,000	63,748,000
Gross Unrealized Gains	0	3,000
Gross Unrealized Losses	(719,000)	(2,136,000)
Fair Value	$ 31,723,000	$ 61,615,000