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Note 7 - Accrued Liabilities (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   

June 30,

   

December 31,

 
   

2024

   

2023

 
                 

Payroll expenses and taxes payable

  $ 161,000     $ 157,000  

Commissions and bonuses payable and general accrued liabilities

    478,000       946,000  

Total accrued liabilities

  $ 639,000     $ 1,103,000