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Note 6 - Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
June
3
0
,
2020
   
December 31,
2019
 
Raw materials
  $
5,326
    $
5,369
 
Work in process
   
1,544
     
949
 
Inventory consigned to others
   
45
     
54
 
Finished goods
   
1,015
     
810
 
Total inventories
  $
7,930
    $
7,182
 
   
Three Months Ended
June 30,
   
Six Months Ended
June 30,
 
   
20
20
   
201
9
   
20
20
   
201
9
 
                                 
Excess and obsolete inventory charges
  $
134
    $
136
    $
305
    $
243