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Note 14 - Paycheck Protection Program Loan (Tables)
 12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Debt [Table Text Block]
   
December 31, 2020
    
December 31, 2019
  
PPP Loan, .98%, due April 2022:                
Principal   $
1,572
     $
—
  
Accrued interest    
12
      
—
  
    $
1,584
     $
—
  
                 
PPP Loan payable:                
Current portion   $
950
      
 
  
Long-term portion    
634
      
 
  
    $
1,584
     $
—