Capital Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Capital Assets
Cost	$ 56,887	$ 52,910
Accumulated Depreciation	(26,301)	(25,573)
Net Book Value	30,586	27,337
Rolling stock
Capital Assets
Cost	8,944	8,775
Accumulated Depreciation	(4,733)	(4,472)
Net Book Value	4,211	4,303
Enclosures
Capital Assets
Cost	39,862	37,632
Accumulated Depreciation	(18,990)	(18,562)
Net Book Value	20,872	19,070
Machinery and equipment
Capital Assets
Cost	5,283	4,012
Accumulated Depreciation	(1,233)	(1,208)
Net Book Value	4,050	2,804
Furniture and fixtures
Capital Assets
Cost	1,136	1,129
Accumulated Depreciation	(179)	(180)
Net Book Value	957	949
Information technology
Capital Assets
Cost	1,662	1,362
Accumulated Depreciation	(1,166)	(1,151)
Net Book Value	$ 496	$ 211

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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