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Note 6 - Property, Plant and Equipment, Net (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

March 31,

2022

  

December 31,

2021

 

Land

 $231,034  $231,034 

Buildings and improvements

  3,164,362   2,961,431 

Machinery & equipment

  21,739,595   21,612,759 

Total property, plant & equipment

  25,134,991   24,805,224 

Less: accumulated depreciation

  9,730,186   9,196,022 

Property plant & equipment, net

 $15,404,805  $15,609,202