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SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2018
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Summary of Company's Ownership Percentage in Each of Its Subsidiaries | The following table sets forth the Company’s ownership percentage in each of its subsidiaries as of December 31, 2018:
Name of Subsidiary |  | % Ownership as of December 31, 2018 |
NXE Energy Royalty Ltd. |  |  | 100 | %
NXE Energy SW1 Ltd. |  |  | 100 | %
NXE Energy SW3 Ltd. |  |  | 100 | %
IsoEnergy Ltd. |  |  | 53.35 | %
Summary of Depreciation Over the Estimated Useful Lives of Each Significant Component | Depreciation is calculated over the estimated useful lives of each significant component as follows:
|  | - |  | Computing equipment |  | 55% declining balance basis
|  | - |  | Software |  | 55% declining balance basis
|  | - |  | Field equipment |  | 20% declining balance basis
|  | - |  | Leasehold improvements |  | Lease term
|  | - |  | Road |  | 5-year straight-line basis

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