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Marketable Securities (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 136,940,000	$ 120,208,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(282,000)	(61,000)
Fair Value	136,658,000	120,147,000
Allowance for credit loss related to available-for-sale debt securities	0	0
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	128,231,000	81,184,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(274,000)	(52,000)
Fair Value	127,957,000	81,132,000
Government-sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,705,000	7,739,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(5,000)	(5,000)
Fair Value	7,700,000	7,734,000
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,004,000	31,285,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(3,000)	(4,000)
Fair Value	$ 1,001,000	$ 31,281,000

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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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