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Exploration and Evaluation Assets - Summary of Capitalized Costs on Projects (Detail) - CAD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | $ 152,412,555 |
Impairment |  | $ 87,749
Exploration and evaluation assets, ending balance | 194,128,594 | 152,412,555
Acquisition Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 26,429,932 | 22,793,390
Additions | 1,885,297 | 3,636,542
Exploration and evaluation assets, ending balance | 28,315,229 | 26,429,932
Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 125,982,623 | 86,653,530
Expense arising from exploration for and evaluation of mineral resources | 39,830,742 | 39,416,842
Impairment |  | (87,749)
Exploration and evaluation assets, ending balance | 165,813,365 | 125,982,623
Rook I Property [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 113,173,036 |
Exploration and evaluation assets, ending balance | 148,894,002 | 113,173,036
Rook I Property [member] | Acquisition Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 235,077 | 230,807
Additions |  | 4,270
Exploration and evaluation assets, ending balance | 235,077 | 235,077
Rook I Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 112,937,959 | 77,007,303
Expense arising from exploration for and evaluation of mineral resources | 35,720,966 | 35,930,656
Exploration and evaluation assets, ending balance | 148,658,925 | 112,937,959
Other Athabasca Basin Properties [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 6,399,904 |
Impairment |  | 87,749
Exploration and evaluation assets, ending balance | 7,988,140 | 6,399,904
Other Athabasca Basin Properties [member] | Acquisition Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 1,457,607 | 1,124,277
Additions |  | 333,330
Exploration and evaluation assets, ending balance | 1,457,607 | 1,457,607
Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 4,942,297 | 4,318,909
Expense arising from exploration for and evaluation of mineral resources | 1,588,236 | 711,137
Impairment |  | (87,749)
Exploration and evaluation assets, ending balance | 6,530,533 | 4,942,297
Drilling [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 17,865,105 | 21,764,192
Drilling [member] | Rook I Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 16,761,145 | 20,592,799
Drilling [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources |  | 3,297
General Exploration [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 3,003,872 | 2,300,042
General Exploration [member] | Rook I Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 2,885,003 | 2,163,554
General Exploration [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | (23,200) | 25,885
Geological and Geophysical [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 9,518,018 | 6,409,853
Geological and Geophysical [member] | Rook I Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 7,650,358 | 5,206,266
Geological and Geophysical [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 1,611,436 | 681,955
Labour and Wages [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 5,702,457 | 4,901,854
Labour and Wages [member] | Rook I Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 5,008,846 | 4,391,456
Share-based Payments [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 3,119,563 | 3,309,791
Share-based Payments [member] | Rook I Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 2,883,711 | 2,952,316
Travel [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 621,727 | 731,110
Travel [member] | Rook I Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 531,903 | 624,265
IsoEnergy Ltd. [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 32,839,615 |
Exploration and evaluation assets, ending balance | 37,246,452 | 32,839,615
IsoEnergy Ltd. [member] | Acquisition Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 24,737,248 | 21,438,306
Additions | 1,885,297 | 3,298,942
Exploration and evaluation assets, ending balance | 26,622,545 | 24,737,248
IsoEnergy Ltd. [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 8,102,367 | 5,327,318
Expense arising from exploration for and evaluation of mineral resources | 2,521,540 | 2,775,049
Exploration and evaluation assets, ending balance | 10,623,907 | 8,102,367
IsoEnergy Ltd. [member] | Drilling [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 1,103,960 | 1,168,096
IsoEnergy Ltd. [member] | General Exploration [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 142,069 | 110,603
IsoEnergy Ltd. [member] | Geological and Geophysical [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 256,224 | 521,632
IsoEnergy Ltd. [member] | Labour and Wages [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 693,611 | 510,398
IsoEnergy Ltd. [member] | Share-based Payments [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 235,852 | 357,475
IsoEnergy Ltd. [member] | Travel [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | $ 89,824 | $ 106,845

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- Definition The amount of assets arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2018-01-01 -Paragraph 24 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=6&date=2018-03-01&anchor=para_24_b&doctype=Standard -URIDate 2018-03-16 + Details
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