XML 36 R23.htm IDEA: XBRL DOCUMENT v3.21.2
Note 5 - Inventories, Net (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]

Inventories consist of:

        
  

June 30, 2021

  

December 31, 2020

 
         

Raw materials

 $1,081,709  $928,221 

Work-in-process

  215,493   195,618 

Inventories

 $1,297,202  $1,123,839