Annual report pursuant to Section 13 and 15(d)

Schedule of Marketable Securities (Details)

v3.22.4
Schedule of Marketable Securities (Details) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Amortized Cost $ 22,757,000 $ 28,737
Unrealized Gain 2
Fair Value 21,933,000 28,592
Unrealized (Loss) (824,000) (147)
US Treasury Securities [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Amortized Cost 993,000  
Unrealized Gain  
Fair Value 959,000  
Unrealized (Loss) (34,000)  
US Government Agencies Debt Securities [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Amortized Cost 16,324,000 19,395,000
Unrealized Gain 2,000
Fair Value 15,603,000 19,277,000
Unrealized (Loss) (721,000) (120,000)
Corporate Debt Securities [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Amortized Cost 5,440,000 9,092,000
Unrealized Gain
Fair Value 5,371,000 9,065,000
Unrealized (Loss) $ (69,000) (27,000)
US States and Political Subdivisions Debt Securities [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Amortized Cost   250,000
Unrealized Gain  
Fair Value   250,000
Unrealized (Loss)