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Fair Value Measurements - Schedule of Amortized Cost (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	$ 26,278,000		$ 26,278,000		$ 74,201,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(457,000)		(457,000)		(1,486,000)
Fair Value	25,821,000		25,821,000		72,715,000
Accrued interest receivable	1,400,000		1,400,000		1,700,000
Realized gains (losses) on marketable securities	0	$ 0	0	$ 0
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost					15,437,000
Gross Unrealized Gains					0
Gross Unrealized Losses					(64,000)
Fair Value					15,373,000
Yankee bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost					2,601,000
Gross Unrealized Gains					0
Gross Unrealized Losses					(13,000)
Fair Value					2,588,000
Agency bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	2,491,000		2,491,000		6,056,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(11,000)		(11,000)		(56,000)
Fair Value	2,480,000		2,480,000		6,000,000
Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	9,597,000		9,597,000		12,694,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(228,000)		(228,000)		(597,000)
Fair Value	9,369,000		9,369,000		12,097,000
Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost					4,971,000
Gross Unrealized Gains					0
Gross Unrealized Losses					(37,000)
Fair Value					4,934,000
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	14,190,000		14,190,000		32,442,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(218,000)		(218,000)		(719,000)
Fair Value	$ 13,972,000		$ 13,972,000		$ 31,723,000

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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