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Exploration and Evaluation Assets (Details Narrative) |  |  |  |  |  |  |  | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 25, 2019 CAD ($) shares | May 04, 2018 CAD ($) | May 04, 2018 DKK (kr) | Apr. 11, 2016 | Jan. 04, 2016 CAD ($) a | Aug. 01, 2015 CAD ($) | Mar. 04, 2012 CAD ($) | Mar. 04, 2012 DKK (kr) | Aug. 15, 2011 CAD ($) | Aug. 15, 2011 DKK (kr) | Sep. 30, 2019 CAD ($) shares | Sep. 30, 2018 CAD ($) | Dec. 31, 2018 CAD ($) | Dec. 31, 2018 DKK (kr) | Dec. 31, 2017 CAD ($) | Dec. 31, 2017 DKK (kr) | Dec. 31, 2016 CAD ($) | Dec. 31, 2016 DKK (kr) | Dec. 31, 2015 CAD ($) | Dec. 31, 2015 DKK (kr) | Dec. 31, 2018 DKK (kr) | Jan. 04, 2016 USD ($) $ / shares | Dec. 31, 2015 DKK (kr) | Mar. 12, 2013
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition and exploration related cost |  |  |  |  |  |  |  |  |  |  | $ 690,000 | $ 12,778,000 |  |  |  |  |  |  |  |  |  |  |  |
Reclamation deposit |  |  |  |  |  |  |  |  |  |  | 14,000 |  | $ 14,000 |  |  |  |  |  |  |  |  |  |  |
Post Creek Property [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest in property to be acquired on basis of option agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00%
Advances payable annually on net smelter return royalties |  |  |  |  |  | $ 10,000 |  |  |  |  |  |  | 10,000 |  |  |  |  |  |  |  |  |  |  |
Payments made in advance |  |  |  |  |  |  |  |  |  |  | 10,000 | 10,000 |  |  |  |  |  |  |  |  |  |  |  |
Exploration and license related expenditures |  |  |  |  |  |  |  |  |  |  | 53,014 | 33,231 |  |  |  |  |  |  |  |  |  |  |  |
Halcyon Property [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advances payable annually on net smelter return royalties |  |  |  |  |  | $ 8,000 |  |  |  |  |  |  | 8,000 |  |  |  |  |  |  |  |  |  |  |
Exploration and license related expenditures |  |  |  |  |  |  |  |  |  |  | 20,853 | 26,563 |  |  |  |  |  |  |  |  |  |  |  |
Quetico Property [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration and license related expenditures |  |  |  |  |  |  |  |  |  |  | $ 16,425 | 61,210 |  |  |  |  |  |  |  |  |  |  |  |
Acquisition and exploration related cost |  |  |  |  |  |  |  |  |  |  |  |  | 64,256 |  |  |  |  |  |  |  |  |  |  |
Exploration claim description |  |  |  |  |  |  |  |  |  |  | The second anniversary of the recording of a claim and by each anniversary thereafter, a minimum of $400 worth of exploration activity per claim unit must be reported to the Provincial Recording Office. |  |  |  |  |  |  |  |  |  |  |  |  |
Quetico Property [Member] | After April 26, 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total annual work requirement cost |  |  |  |  |  |  |  |  |  |  | $ 324,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Lingman Lake Property [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition and exploration related cost |  |  |  |  |  |  |  |  |  |  | $ 26,453 |  |  |  |  |  |  |  |  |  |  |  |  |
Loveland (Enid Creek) Property [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration of acquisition in cash | $ 1,525,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Post-consolidation common shares | shares | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Work commitments amount | $ 4,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Work commitments term | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued for common stock | shares |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase consideration value |  |  |  |  |  |  |  |  |  |  | $ 60,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition related costs |  |  |  |  |  |  |  |  |  |  | 2,810 |  |  |  |  |  |  |  |  |  |  |  |  |
Loveland (Enid Creek) Property [Member] | International Explorers and Prospectors Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest in property to be acquired on basis of option agreement | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Section 35 Property [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration and license related expenditures |  |  |  |  |  |  |  |  |  |  | 4,548 | 1,591 |  |  |  |  |  |  |  |  |  |  |  |
Length of metallic minerals lease |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of land | a |  |  |  |  | 320 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reclamation deposit |  |  |  |  | $ 14,327 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Section 35 Property [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of production royalty payable |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |  |
Section 35 Property [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of production royalty payable |  |  |  |  | 2.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50% |  |
Section 35 Property [Member] | US Dollar [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reclamation deposit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,000 |  |
Section 35 Property [Member] | Not Later Than Five Years [Member] | US Dollar [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual rental fee | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3.00 |  |
Section 35 Property [Member] | Later Than Five Years and Not Later Than Ten Years [Member] | US Dollar [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual rental fee | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.00 |  |
Section 35 Property [Member] | Year 11 Onwards [Member] | US Dollar [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional annual rental fee | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00 |  |
Section 35 Property [Member] | Year 11 Onwards [Member] | US Dollar [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual rental fee | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00 |  |
Section 35 Property [Member] | Year 11 Onwards [Member] | US Dollar [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual rental fee | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 55.00 |  |
Maniitsoq Property [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration and license related expenditures |  |  |  |  |  |  |  |  |  |  | $ 382,020 | 13,181,011 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of net smelter return royalties |  |  |  |  |  |  |  |  |  |  | 2.50% |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of net smelter return royalties after reduction |  |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Payment required to reduce net smelter return royalties |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of days from decision to commence commercial production to reduce net smelter return royalties |  |  |  |  |  |  |  |  |  |  | 60 days |  |  |  |  |  |  |  |  |  |  |  |  |
Period of additional license application for years 11-13 |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |
Period of additional license application after year 13 |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |
License period description |  |  |  |  |  |  |  |  |  |  | The expiration of the first license period, the Company may apply for a second licence period (years 6-10), and the Company may apply for a further 3-year licence for years 11 to 13. Thereafter, the Company may apply for additional 3-year licences for years 14 to 16, 17 to 19 and 20 to 22. The Company will be required to pay additional license fees and will be obligated to incur minimum eligible exploration expenses for such years. |  |  |  |  |  |  |  |  |  |  |  |  |
Sulussugut License [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration and license related expenditures |  |  |  |  |  |  |  |  |  |  | $ 219,377 | 10,400,576 | 10,794,837 |  | $ 11,078,506 |  |  |  |  |  |  |  |  |
License fee paid |  |  |  |  |  |  |  |  | $ 5,742 |  |  |  |  |  |  |  | $ 7,982 |  |  |  |  |  |  |
Period of additional license application after first period |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration requirement |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,955,201 |  |  |  | $ 15,808,386 |  |  |  |  |
Exploration cost |  |  |  |  |  |  |  |  |  |  |  |  | 55,731,837 |  |  |  |  |  | 26,115,831 |  |  |  |  |
Accumulated exploration surplus credits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 19,067,735 |  |  |  |  |
Approved exploration expenditures |  |  |  |  |  |  |  |  |  |  |  |  | 16,342,476 |  |  |  |  |  |  |  |  |  |  |
Total carried credits |  |  |  |  |  |  |  |  |  |  |  |  | 66,950,764 |  |  |  |  |  |  |  |  |  |  |
Sulussugut License [Member] | Danish Krone [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
License fee paid | kr |  |  |  |  |  |  |  |  |  | kr 31,400 |  |  |  |  |  |  |  | kr 40,400 |  |  |  |  |  |
Exploration requirement | kr |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | kr 44,373,540 |  |  |  | kr 83,809,340 |  |  |  |
Accumulated exploration surplus credits | kr |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | kr 100,303,710 |
Approved exploration expenditures | kr |  |  |  |  |  |  |  |  |  |  |  |  |  | kr 79,604,364 |  |  |  |  |  |  |  |  |  |
Total carried credits | kr |  |  |  |  |  |  |  |  |  |  |  |  |  | kr 326,111,805 |  |  |  |  |  |  |  |  |  |
Ininngui License [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration and license related expenditures |  |  |  |  |  |  |  |  |  |  | 39,184 | 1,366,147 | 1,422,917 |  | 984,626 |  |  |  |  |  |  |  |  |
License fee paid |  |  |  |  |  |  | $ 5,755 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration requirement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration cost |  |  |  |  |  |  |  |  |  |  |  |  | 5,120,917 |  |  |  |  |  |  |  |  |  |  |
Accumulated exploration surplus credits |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,290,105 |  |  |  |  |  |  |  |  |  |  |
Period of license |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years | 5 years |  |  |  |  |  |
Percentage of difference between minimum exploration expenditures and actual spend on exploration costs payable in cash |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |
Ininngui License [Member] | Danish Krone [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
License fee paid | kr |  |  |  |  |  |  |  | kr 32,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated exploration surplus credits | kr |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | kr 35,509,523 |  |  |
Carbonatite License [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration and license related expenditures |  |  |  |  |  |  |  |  |  |  | 123,460 | $ 1,282,590 | $ 1,369,482 |  |  |  |  |  |  |  |  |  |  |
License fee paid |  | $ 6,523 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration cost |  |  |  |  |  |  |  |  |  |  |  |  | 1,362,959 |  |  |  |  |  |  |  |  |  |  |
Total carried credits |  |  |  |  |  |  |  |  |  |  |  |  | 2,018,103 |  |  |  |  |  |  |  |  |  |  |
Period of license |  | 5 years | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carbonatite License [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration requirement |  |  |  |  |  |  |  |  |  |  |  |  | $ 55,215 |  |  |  |  |  |  |  |  |  |  |
Carbonatite License [Member] | Danish Krone [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
License fee paid | kr |  |  | kr 31,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total carried credits | kr |  |  |  |  |  |  |  |  |  |  |  |  |  | kr 9,830,021 |  |  |  |  |  |  |  |  |  |
Carbonatite License [Member] | Danish Krone [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration requirement | kr |  |  |  |  |  |  |  |  |  |  |  |  |  | kr 268,950 |  |  |  |  |  |  |  |  |  |
Ikertoq License [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration and license related expenditures |  |  |  |  |  |  |  |  |  |  | $ 132,679 |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Accumulated exploration surplus credits. + References No definition available. + Details
Name: | WSCRF_AccumulatedExplorationSurplusCredits
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Additional annual rental fee. + References No definition available. + Details
Name: | WSCRF_AdditionalAnnualRentalFee
Namespace Prefix: | WSCRF_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of advances payable annually on net smelter return royalties. + References No definition available. + Details
Name: | WSCRF_AdvancesPayableAnnuallyOnNetSmelterReturnRoyalties
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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