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Note 7 - Accrued Liabilities (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   

September 30,

   

December 31,

 
   

2025

   

2024

 
                 

Payroll expenses and taxes payable

  $ 354,000     $ 221,000  

Commissions and bonuses payable and general accrued liabilities

    635,000       726,000  

Total accrued liabilities

  $ 989,000     $ 947,000