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Note 19 - Pension Plan (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
    2019     2018  
             
Gross employer service cost   $
766
     $
1,237
  
Plan participant contributions    
(185
 )    
(246
 )
Interest cost on service cost    
15
      
22
  
Employer's service cost    
596
      
1,013
  
Interest cost    
424
      
744
  
Expected net return on plan assets    
(395
 )    
(689
 )
Other costs    
113
      
171
  
Settlement gain    
(1,302
 )    
-
  
Total employer's pension expense   $
(564
 )   $
1,239
  
Schedule of Changes in Accumulated Postemployment Benefit Obligations [Table Text Block]
Change in benefit obligation:   2019     2018  
             
Projected benefit obligation - January 1   $
38,974
     $
42,368
  
Current service cost    
596
      
1,013
  
Plan participant / third party contributions    
185
      
246
  
Interest cost    
424
      
744
  
Benefits paid    
(371
 )    
(601
 )
Individual settlements    
(35
 )    
84
  
Settlement due to amendment of contract    
(45,388
 )    
-
  
Settled benefits due to the purchase of annuity contracts    
(319
 )    
-
  
Foreign exchange    
(1,177
 )    
(2,038
 )
Expected projected benefit obligation, December 31    
(7,111
 )    
41,816
  
Actuarial loss / (gain), net of foreign exchange    
8,924
      
(2,842
 )
Projected benefit obligation - December 31   $
1,813
     $
38,974
  
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]
Change in plan assets:   2019     2018  
             
Fair value of plan assets - January 1   $
37,177
     $
38,813
  
Expected net return on plan assets    
395
      
689
  
Contributions                
Employer    
321
      
634
  
Plan participants    
185
      
246
  
Benefits paid    
(371
 )    
(601
 )
Individual settlements    
(35
 )    
84
  
Settlement due to amendment of contract    
(45,388
 )    
-
  
Settled benefits due to the purchase of annuity contracts    
(319
 )    
-
  
Other costs    
(113
 )    
(171
 )
Foreign exchange    
(1,142
 )    
(1,853
 )
Expected fair value of plan assets - December 31    
(9,290
 )    
37,841
  
Actuarial (gain)/loss, net of foreign exchange    
9,300
      
(664
 )
Fair value of plan assets - December 31   $
10
     $
37,177
  
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
    December 31,     December  31,  
    2019     2018  
             
Present value of accumulated benefit obligation   $
(701
 )   $
(37,925
 )
Effect of future compensation increases    
(1,113
 )    
(1,049
 )
Present value of projected benefit obligation    
(1,813
 )    
(38,974
 )
Fair value of plan assets    
10
      
37,177
  
Net liability for pension benefits   $
(1,803
 )   $
(1,797
 )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
    2019     2018  
             
Actuarial gain on remeasurement of projected benefit obligation   $
8,902
     $
(2,931
 )
Actuarial (gain)/loss on remeasurement of fair value of assets    
(9,277
 )    
685
  
Settlement due to amendment of insurance contract    
1,302
      
-
  
Total gain recognized in other comprehensive income   $
927
     $
(2,246
 )
Defined Benefit Plan, Assumptions [Table Text Block]
    December 31, 2019     July 31, 2019     December 31, 2018  
Discount rate used in determining present values    
1.0
 %    
0.9
 %    
1.9
 %
Annual increase in future compensation levels    
1.7
 %    
1.7
 %    
1.8
 %
    December 31, 2019     July 31, 2019     December 31, 2018  
Discount rate used in determining present values    
1.0
 %    
0.9
 %    
1.9
 %
Annual increase in future compensation levels    
1.7
 %    
1.7
 %    
1.8
 %
Expected long-term rate of return on assets    
1.0
 %    
N/A
      
1.9
 %