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Summary of Components of Marketable Securities (Details) - USD ($)
Jun. 30, 2022
Dec. 31, 2021
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Amortized Cost $ 3,600,000 $ 8,954,000
Unrealized Gains 123,000 17,000
Unrealized Losses (184,000) (192,000)
Fair Value 3,539,000 8,779,000
U.S. Government Obligations [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Amortized Cost 1,051,000 650,000
Unrealized Gains 17,000
Unrealized Losses (67,000)
Fair Value 984,000 667,000
Corporate Obligations [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Amortized Cost 2,549,000 8,304,000
Unrealized Gains 123,000
Unrealized Losses (117,000) (192,000)
Fair Value $ 2,555,000 $ 8,112,000