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Capital Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Accumulated Depreciation | $ (18,290) | $ (17,420)
Cost | 39,294 | 39,311
Net Book Value | 21,004 | 21,891
Rolling Stock [Member] |  |
Accumulated Depreciation | (3,392) | (3,369)
Cost | 3,450 | 3,450
Net Book Value | 58 | 81
Enclosures [Member] |  |
Accumulated Depreciation | (12,661) | (11,834)
Cost | 33,008 | 33,008
Net Book Value | 20,347 | 21,174
Machinery And Equipment [Member] |  |
Accumulated Depreciation | (918) | (885)
Cost | 1,448 | 1,446
Net Book Value | 530 | 561
Furniture And Fixtures [Member] |  |
Accumulated Depreciation | (119) | (119)
Cost | 119 | 119
Net Book Value | 0 | 0
Information Technology [Member] |  |
Accumulated Depreciation | (1,107) | (1,098)
Cost | 1,160 | 1,123
Net Book Value | 53 | 25
Right Of Use Assets [Member] |  |
Accumulated Depreciation | (93) | (115)
Cost | 109 | 165
Net Book Value | $ 16 | $ 50

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