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Note 5 - Fixed Assets - Components of Fixed Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Cost | $ 224,643 | $ 182,274
Net | 73,083 | 57,575
Accumulated depreciation | 151,560 | 124,699
Land [Member] |  |
Cost | 2,520 | 2,519
Net | 2,520 | 2,519
Building [Member] |  |
Cost | 10,366 | 10,231
Net | 5,837 | 6,203
Accumulated depreciation | 4,529 | 4,028
Vehicles [Member] |  |
Cost | 52,497 | 35,983
Net | 18,758 | 9,952
Accumulated depreciation | 33,739 | 26,031
Furniture and Fixtures [Member] |  |
Cost | 54,194 | 43,399
Net | 16,387 | 13,964
Accumulated depreciation | 37,807 | 29,435
Computer Equipment [Member] |  |
Cost | 81,516 | 69,405
Net | 21,620 | 20,777
Accumulated depreciation | 59,896 | 48,628
Leasehold Improvements [Member] |  |
Cost | 23,550 | 20,737
Net | 7,961 | 4,160
Accumulated depreciation | $ 15,589 | $ 16,577

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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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