XML 32 R22.htm IDEA: XBRL DOCUMENT v3.22.1
Note 5 - Inventories (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

March 31,

  

December 31,

 
  

2022

  

2021

 
         

Raw materials

 $12,625,000  $13,545,000 

Work in process

  4,765,000   3,890,000 

Finished goods

  6,493,000   7,534,000 
  $23,883,000  $24,969,000