Quarterly report pursuant to Section 13 or 15(d)

Schedule of Marketable Securities (Details)

v3.23.1
Schedule of Marketable Securities (Details) - USD ($)
Mar. 31, 2023
Dec. 31, 2022
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Amortized Cost $ 19,713,000 $ 22,757
Unrealized Gain
Fair Value 19,118,000 21,933
Unrealized (Loss) (595,000) (824)
US Treasury Securities [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Amortized Cost 995,000 993,000
Unrealized Gain
Fair Value 969,000 959,000
Unrealized (Loss) (26,000) (34,000)
US Government Agencies Debt Securities [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Amortized Cost 15,306,000 16,324,000
Unrealized Gain
Fair Value 14,762,000 15,603,000
Unrealized (Loss) (544,000) (721,000)
Corporate Debt Securities [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Amortized Cost 3,412,000 5,440,000
Unrealized Gain
Fair Value 3,387,000 5,371,000
Unrealized (Loss) $ (25,000) $ (69,000)