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Note 17 - Other Current Liabilities (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
    December 31,
    2019   2018
    (in thousands)
Compensation and payroll   $
2,554
     $
2,899
  
Professional fees    
395
      
536
  
Warranty costs    
252
      
391
  
Local taxes, including VAT    
345
      
423
  
Customer related costs    
963
      
1,242
  
Interest    
425
      
480
  
Other    
1,157
      
1,379
  
Total   $
6,091
     $
7,350