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Note 15 - Other Current Liabilities
 3 Months Ended
Mar. 31, 2020
Notes to Financial Statements  
Accrued Expenses Disclosure [Text Block]
15.
Other Current Liabilities
    March 31,   December 31,
    2020   2019
    (in thousands)
Compensation and payroll   $
2,896
     $
2,554
  
Professional fees    
567
      
395
  
Warranty costs    
201
      
252
  
Local taxes, including VAT    
91
      
345
  
Customer related costs    
1,179
      
963
  
Interest    
490
      
425
  
Other    
2,025
      
1,157
  
Total   $
7,449
     $
6,091