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Note 7 - Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
  

2023

  

2022

 

Customer relationships

 $489,273  $473,308 

Patent cost

  183,874   177,875 
   673,148   651,183 

Less Accumulated amortization

  (558,555)  (438,250)

Intangible assets, net

 $114,593  $212,933 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Year ending December 31,

 

Amortization

Expenses

 

2024

  72,902 

2025

  7,665 

2026

  7,665 

2027

  7,665 

2028

  7,665 

Thereafter

  11,031 
  $114,593