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Note 11 - Accrued Liabilities (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   
December 31,
 
   
2020
   
2019
 
Salaries, wages, employment taxes and withholdings
  $
2,793
    $
2,416
 
Employee benefit plans
   
1,216
     
1,517
 
Accrued professional fees
   
695
     
966
 
Income, property and other taxes
   
253
     
355
 
Contract liabilities
   
6,816
     
5,769
 
Deferred gain from sale-leaseback
   
296
     
313
 
Other
   
1,340
     
1,159
 
Total   $
13,409
    $
12,495