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Note 4 - Inventory (Tables)
6 Months Ended
Jun. 30, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

June 30,

2022

  

December 31,

2021

 

Raw materials and component parts

 $3,762,339  $3,904,865 

Work-in-process

  4,434,122   3,949,647 

Finished products

  13,181,987   9,183,532 

Total inventory

 $21,378,448  $17,038,044 

Less: inventory reserves

  559,313   452,607 

Net inventory

 $20,819,135  $16,585,437