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Marketable Securities (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 17,384,000	$ 45,467,000
Gross Unrealized Gains	8,000	6,000
Gross Unrealized Losses	0	(11,000)
Fair Value	17,392,000	45,462,000
Allowance for credit loss related to available-for-sale debt securities	0	0
Government-sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	13,168,000	32,812,000
Gross Unrealized Gains	8,000	5,000
Gross Unrealized Losses	0	(7,000)
Fair Value	13,176,000	32,810,000
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,216,000	12,655,000
Gross Unrealized Gains	0	1,000
Gross Unrealized Losses	0	(4,000)
Fair Value	$ 4,216,000	$ 12,652,000

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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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