Investments in Available-for-Sale Securities - Schedule of investments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Cost Basis	$ 36,137	$ 32,715
Available-for-sale, Gross Unrealized Gains	212	15
Available-for-sale, Gross Unrealized Losses	(2)	(6)
Available-for-sale, Fair Value	36,347	32,724
U.S. government and agency securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Cost Basis	14,834	28,764
Available-for-sale, Gross Unrealized Gains	78	14
Available-for-sale, Gross Unrealized Losses		(5)
Available-for-sale, Fair Value	14,912	28,773
Corporate notes and bonds
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Cost Basis	21,303	3,951
Available-for-sale, Gross Unrealized Gains	134	1
Available-for-sale, Gross Unrealized Losses	(2)	(1)
Available-for-sale, Fair Value	$ 21,435	$ 3,951