Quarterly report pursuant to Section 13 or 15(d)

PATENTS (Tables)

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PATENTS (Tables)
3 Months Ended
Mar. 31, 2024
Patents  
Schedule of Intangible Assets and Goodwill [Table Text Block]
             
    March 31, 2024     December 31, 2023  
Gross carrying amount – patents   $ 8,473,000     $ 8,473,000  
Accumulated amortization – patents     (7,177,000 )     (7,147,000 )
Patents, net   $ 1,296,000     $ 1,326,000  
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
           
  For the years ended December 31,  
  2024 – remaining     $ 90,000  
  2025       120,000  
  2026       120,000  
  2027       119,000  
  2028       116,000  
  Thereafter       731,000  
  Total     $ 1,296,000