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Note 15 - Pension Plan (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Schedule of Net Benefit Costs [Table Text Block] |
|  | 2018 |  |  | 2017 |
Gross employer service cost |  | $ | 1,237 |  |  | $ | 1,501 |
Plan participant contributions |  |  | (246 | ) |  |  | (308 | )
Interest cost on service cost |  |  | 22 |  |  |  | 27 |
Employer's service cost |  |  | 1,013 |  |  |  | 1,220 |
Interest cost |  |  | 744 |  |  |  | 701 |
Expected net return on plan assets |  |  | (689 | ) |  |  | (640 | )
Other costs |  |  | 171 |  |  |  | 166 |
Total employer's pension expense |  | $ | 1,239 |  |  | $ | 1,447 |
Schedule of Changes in Accumulated Postemployment Benefit Obligations [Table Text Block] |
Change in benefit obligation: |  | 2018 |  |  | 2017 |
Projected benefit obligation - January 1 |  | $ | 42,368 |  |  | $ | 36,659 |
Current service cost |  |  | 1,014 |  |  |  | 1,220 |
Plan participant / third party contributions |  |  | 246 |  |  |  | 308 |
Interest cost |  |  | 744 |  |  |  | 701 |
Benefits paid |  |  | (601 | ) |  |  | (495 | )
Individual settlements |  |  | 84 |  |  |  | - |
Curtailment |  |  | - |  |  |  | (125 | )
Foreign exchange |  |  | (2,038 | ) |  |  | 5,204 |
Expected projected benefit obligation, December 31 |  |  | 41,817 |  |  |  | 43,472 |
Actuarial gain, net of foreign exchange |  |  | (2,842 | ) |  |  | (1,105 | )
Projected benefit obligation - December 31 |  | $ | 38,975 |  |  | $ | 42,367 |
Schedule of Changes in Fair Value of Plan Assets [Table Text Block] |
Change in plan assets: |  | 2018 |  |  | 2017 |
Fair value of plan assets - January 1 |  | $ | 38,813 |  |  | $ | 33,016 |
Expected net return on plan assets |  |  | 689 |  |  |  | 640 |
Contributions |  |  |  |  |  |  |  |
Employer |  |  | 634 |  |  |  | 609 |
Plan participants |  |  | 246 |  |  |  | 308 |
Benefits paid |  |  | (601 | ) |  |  | (495 | )
Individual settlements |  |  | 84 |  |  |  | - |
Other costs |  |  | (171 | ) |  |  | (72 | )
Foreign exchange |  |  | (1,853 | ) |  |  | 4,658 |
Expected fair value of plan assets - December 31 |  |  | 37,841 |  |  |  | 38,664 |
Actuarial (gain)/loss, net of foreign exchange |  |  | (664 | ) |  |  | 149 |
Fair value of plan assets - December 31 |  | $ | 37,177 |  |  | $ | 38,813 |
Schedule of Amounts Recognized in Balance Sheet [Table Text Block] |
|  | December 31, 2018 |  |  | December 31, 2017 |
Present value of accumulated benefit obligation |  | $ | (37,925 | ) |  | $ | (40,142 | )
Effect of future compensation increases |  |  | (1,049 | ) |  |  | (2,226 | )
Present value of projected benefit obligation |  |  | (38,974 | ) |  |  | (42,368 | )
Fair value of plan assets |  |  | 37,177 |  |  |  | 38,813 |
Net liability for pension benefits |  | $ | (1,797 | ) |  | $ | (3,555 | )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] |
|  | 2018 |  |  | 2017 |
Actuarial gain on remeasurement of projected benefit obligation |  | $ | (2,931 | ) |  | $ | (1,038 | )
Actuarial (gain)/loss on remeasurement of fair value of assets |  |  | 685 |  |  |  | (234 | )
Actuarial gain on curtailment of benefits from reorganization |  |  | - |  |  |  | (125 | )
Total gain recognized in other comprehensive income |  | $ | (2,246 | ) |  | $ | (1,397 | )
Schedule of Assumptions Used [Table Text Block] |
|  | 2018 |  |  | 2017 |
Discount rate used in determining present values |  |  | 1.9 | % |  |  | 1.8 | %
Annual increase in future compensation levels |  |  | 1.8 | % |  |  | 2.0 | %
|  | 2018 |  |  | 2017 |
Discount rate used in determining present values |  |  | 1.9 | % |  |  | 1.8 | %
Annual increase in future compensation levels |  |  | 1.8 | % |  |  | 2.0 | %
Expected long-term rate of return on assets |  |  | 1.9 | % |  |  | 1.8 | %
Schedule of Allocation of Plan Assets [Table Text Block] |
|  | December 31, |  |  | Fair value measurements |
|  | 2018 |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Equity type investments |  | $ | 3,146 |  |  | $ | 3,146 |  |  | $ | - |  |  | $ | - |
Fixed interest type investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government bonds |  |  | 33,022 |  |  |  | 33,022 |  |  |  | - |  |  |  | - |
Cash |  |  | 92 |  |  |  | 92 |  |  |  | - |  |  |  | - |
Other |  |  | 918 |  |  |  | - |  |  |  | - |  |  |  | 918 |
Total |  | $ | 37,178 |  |  | $ | 36,260 |  |  | $ | - |  |  | $ | 918 |
Schedule of Expected Benefit Payments [Table Text Block] |
| Year ended December 31 |  |  |  |
| 2019 |  | $ | 658 |  |
| 2020 |  |  | 686 |  |
| 2021 |  |  | 721 |  |
| 2022 |  |  | 792 |  |
| 2023 |  |  | 859 |  |
| 2024 - 2028 |  |  | 5,286 |  |

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