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Note 9 - Fixed Assets - Components of Fixed Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Cost $ 388,269 $ 347,493
Accumulated depreciation 261,700 215,948
Net 126,569 131,545
Land [Member]    
Cost 1,941 2,521
Accumulated depreciation
Net 1,941 2,521
Building [Member]    
Cost 6,168 10,602
Accumulated depreciation 4,144 5,136
Net 2,024 5,466
Vehicles [Member]    
Cost 94,267 85,585
Accumulated depreciation 59,775 48,308
Net 34,492 37,277
Furniture and Fixtures [Member]    
Cost 110,499 92,863
Accumulated depreciation 68,834 54,806
Net 41,665 38,057
Computer Equipment [Member]    
Cost 128,061 112,752
Accumulated depreciation 99,427 83,371
Net 28,634 29,381
Leasehold Improvements [Member]    
Cost 47,333 43,170
Accumulated depreciation 29,520 24,327
Net $ 17,813 $ 18,843