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Note 17 - Pension Plan (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
    2016
     
Gross employer service cost   $
1,378
 
Plan participant contributions    
(336
)
Interest cost on service cost    
34
 
Employer's service cost    
1,076
 
Interest cost    
794
 
Expected net return on plan assets    
(787
)
Other costs    
168
 
Total employer's pension expense   $
1,251
 
Schedule of Changes in Accumulated Postemployment Benefit Obligations [Table Text Block]
     
Change in benefit obligation:   2016
     
Projected benefit obligation - January 1, 2016   $
31,421
 
Current service cost    
1,076
 
Plan participant / third party contributions    
336
 
Interest cost    
794
 
Benefits paid    
(438
)
Foreign exchange    
(969
)
Expected projected benefit obligation, December 31, 2016    
32,220
 
Actuarial loss, net of foreign exchange    
4,438
 
Projected benefit obligation - December 31, 2016   $
36,659
 
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]
Change in plan assets:   2016
     
Fair value of plan assets - January 1, 2016   $
30,627
 
Expected net return on plan assets    
787
 
Contributions        
Employer    
603
 
Plan participants    
336
 
Benefits paid    
(438
)
Other costs    
(168
)
Foreign exchange    
(916
)
Expected fair value of plan assets - December 31, 2016    
30,830
 
Actuarial gain, net of foreign exchange    
2,185
 
Fair value of plan assets - December 31, 2016   $
33,016
 
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
    December 31,
2016
     
Present value of accumulated benefit obligation   $
(34,934
)
Effect of future compensation increases    
(1,724
)
Present value of projected benefit obligation    
(36,659
)
Fair value of plan assets    
33,016
 
Net liability for pension benefits   $
(3,643
)
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
    2016
     
Actuarial loss on remeasurement of projected benefit obligation   $
4,654
 
Actuarial gain on remeasurement of fair value of assets    
(2,292
)
Total loss recognized in other comprehensive income   $
2,362
 
Schedule of Assumptions Used [Table Text Block]
Discount rate used in determining present values    
1.8
%
Annual increase in future compensation levels    
2.0
%
Discount rate used in determining present values    
1.8
%
Annual increase in future compensation levels    
2.0
%
Expected long-term rate of return on assets    
1.8
%
Schedule of Allocation of Plan Assets [Table Text Block]
    December 31,   Fair value measurements    
    2016   Level 1   Level 2   Level 3
                 
Equity type investments   $
2,693
    $
2,693
    $
-
    $
-
 
Fixed interest type investments Government bonds    
30,117
     
30,117
     
-
     
 
 
Cash    
83
     
83
     
-
     
-
 
Other    
122
     
-
     
-
     
122
 
Total   $
33,016
    $
32,894
    $
-
    $
122
 
Schedule of Expected Benefit Payments [Table Text Block]
Year ending December 31    
2017     $
464
 
2018      
546
 
2019      
617
 
2020      
644
 
2021      
687
 
2022 - 2026
     
4,375