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Note 8 - Inventories (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

December 31,

2021

  

December 31,

2020

 

Raw materials

 $1,249,000  $842,000 

Work in Process

  2,492,000   2,645,000 

Finished Goods

  4,425,304   4,095,977 

Allowance for excess quantities

  (290,000

)

  (311,000

)

Total inventories

 $7,876,304  $7,271,977