XML 31 R20.htm IDEA: XBRL DOCUMENT v3.20.2
Note 5 - Inventories, Net (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
Inventories consist of:
               
   
September 30,
2020
   
December 31,
2019
 
                 
Raw materials
  $
1,150,339
    $
1,281,250
 
Work-in-process
   
294,396
     
428,463
 
Inventories
  $
1,444,735
    $
1,709,713