Quarterly report pursuant to Section 13 or 15(d)

MARKETABLE SECURITIES (Details)

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MARKETABLE SECURITIES (Details) - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Fair Value [Member]    
OtherInvestmentsReadilyMarketableLineItems [Line Items]    
Certificates of deposit $ 5,288,000 $ 2,976,000
Government securities 7,882,000 20,848,000
Fixed income mutual funds 10,512,000 10,989,000
Corporate bonds and notes   178,000
Total marketable securities 23,682,000 34,991,000
Cost Basis [Member]    
OtherInvestmentsReadilyMarketableLineItems [Line Items]    
Certificates of deposit 5,250,000 3,019,000
Government securities 7,769,000 20,781,000
Fixed income mutual funds 10,650.00 11,904,000
Corporate bonds and notes   192,000
Total marketable securities 23,669,000 35,896,000
Gross Unrealized Gains [Member]    
OtherInvestmentsReadilyMarketableLineItems [Line Items]    
Certificates of deposit 38,000
Government securities 113,000 67,000
Fixed income mutual funds
Corporate bonds and notes  
Total marketable securities 151,000 67,000
Gross Unrealized Losses [Member]    
OtherInvestmentsReadilyMarketableLineItems [Line Items]    
Certificates of deposit (43,000)
Government securities
Fixed income mutual funds (138,000) (915,000)
Corporate bonds and notes   (14,000)
Total marketable securities $ (138,000) $ (972,000)