Note 4 - Mineral Properties (Details Textual) $ / shares in Units, T in Millions																															1 Months Ended		9 Months Ended	12 Months Ended						51 Months Ended
		Nov. 26, 2018 shares	Nov. 15, 2018 CAD ($) shares	Nov. 15, 2018 USD ($) shares	Nov. 30, 2017 CAD ($) shares	Nov. 22, 2017 USD ($)	Jun. 09, 2017 $ / shares $ / oz shares	Nov. 18, 2016 shares	Nov. 17, 2016 USD ($)	Nov. 10, 2016 CAD ($) shares	Nov. 23, 2015 USD ($)	Nov. 18, 2015 shares	Nov. 05, 2015 CAD ($) shares	Mar. 30, 2015 USD ($)	Nov. 17, 2014 USD ($)	Nov. 07, 2014 CAD ($) shares	Nov. 25, 2013 CAD ($) shares	Nov. 13, 2013 USD ($)	Mar. 28, 2013 USD ($) T $ / T	Oct. 31, 2012 USD ($)	Oct. 25, 2012 CAD ($) shares	Mar. 01, 2011 USD ($)	Dec. 02, 2010 USD ($) shares	Nov. 10, 2010 USD ($)	Oct. 27, 2008 USD ($)	Dec. 01, 2007 USD ($) shares	Jun. 16, 2006 USD ($)	May 22, 2006 USD ($)	May 16, 2006 USD ($)	May 08, 2006 USD ($)	Dec. 31, 2013 CAD ($) a	Dec. 31, 2013 USD ($) a	Feb. 28, 2019 CAD ($)	Dec. 31, 2014 shares	Dec. 31, 2013 a shares	May 31, 2013 CAD ($)	May 31, 2013 USD ($)	Dec. 31, 2012 shares	Dec. 31, 2011 shares	Mar. 31, 2015 shares	Feb. 28, 2019 USD ($)	May 31, 2018 CAD ($)	May 31, 2018 USD ($)	Mar. 31, 2018 USD ($)	Mar. 01, 2015 USD ($)	May 29, 2014 USD ($)	Mar. 01, 2014 USD ($)	May 31, 2013 USD ($)	Mar. 01, 2013 USD ($)	Mar. 01, 2012 USD ($)
Payments to Acquire Mineral Rights	[1]																																$ 47,318
Asset Retirement Obligations, Noncurrent, Total																																	$ 374,642								$ 284,000	$ 366,641	$ 283,000
North Bullfrog [Member]
Unpatented Mineral Claims																																	100.00%
Payments to Acquire Mineral Rights	[1],[2]																																$ 47,318
Land Subject to Ground Leases | a																															1,600	1,600			1,600
North Bullfrog [Member] | Nevada Corporation [Member]
Number of Patented Mining Claims Leased																														2
Mining Lease Agreement Term of Contract																														10 years
Capital Leases, Future Minimum Payments, Remainder of Fiscal Year																														$ 2,000																$ 2,400
Capital Leases, Future Minimum Payments Due in Three Years																														2,000																2,400
Capital Leases, Future Minimum Payments Due Thereafter																														$ 3,000																$ 3,600
Net Smelter Return, Royalty Percentage of Production																														3.00%																3.00%
Purchase Price of Each 1% NSR Royalty																														$ 850,000																$ 770,000
Purchase Price of NSR Royalty																														2,550,000																2,310,000
Capital Leases, Future Minimum Payments Due in Five Years																														3,000																3,600
Capital Leases, Future Minimum Payments Due in Two Years																														2,000																2,400
Capital Leases, Future Minimum Payments Due in Four Years																														$ 2,000																$ 2,400
North Bullfrog [Member] | Redstar Gold Corp. [Member]
Number of Patented Mining Claims Leased																									12		1	3	12	3
Mining Lease Agreement Term of Contract																									10 years		10 years	10 years	10 years	10 years
Capital Leases, Future Minimum Payments, Remainder of Fiscal Year																									$ 10,800		$ 2,000	$ 8,000	$ 20,500	$ 4,000
Capital Leases, Future Minimum Payments Due in Three Years																									10,800		2,000	4,800		3,500
Capital Leases, Future Minimum Payments Due Thereafter																									16,200		$ 3,000	$ 7,200	$ 20,000	$ 4,500
Purchase Obligation, Total																									$ 1,000,000
Net Smelter Return, Royalty Percentage of Production																									4.00%		2.00%	2.00%	4.00%	2.00%
Purchase Price of Each 1% NSR Royalty																									$ 1,250,000		$ 1,000,000	$ 1,000,000	$ 1,000,000	$ 1,000,000
Purchase Price of NSR Royalty																									$ 5,000,000		2,000,000	2,000,000	$ 4,000,000	2,000,000
Capital Leases, Future Minimum Payments Due in Five Years																											3,000	7,200		4,500
Capital Leases, Future Minimum Payments Due in Two Years																											2,000	4,800
Capital Leases, Future Minimum Payments Due in Four Years																											$ 2,000	$ 4,800		$ 3,500
North Bullfrog [Member] | Corvus Gold Nevada Inc. [Member]
Number of Patented Mining Claims Leased																						2
Mining Lease Agreement Term of Contract																						10 years
Net Smelter Return, Royalty Percentage of Production														4.00%								2.00%
Purchase Price of Each 1% NSR Royalty														$ 500,000								$ 1,000,000
Purchase Price of NSR Royalty														$ 2,000,000								2,000,000
Lease Term														3 years												5 years
Additional Lease Term														7 years												5 years
Additional Term if the Company Makes Advance Minimum Royalty Payments of USD100,000 per year																										3 years
Advance Royalties Payment														$ 5,000								$ 20,000				$ 100,000																		$ 5,000	$ 30,000		$ 25,000		$ 25,000	$ 25,000
Mining Lease Agreement Term of Contract, Extension Term																						10 years				10 years
Lease Payment for Patented Mining Claims Lease				$ 10,000		$ 10,000			$ 10,000		$ 10,000				$ 10,000			$ 10,000		$ 10,000						$ 5,000
Lease Payments Common Shares Issued | shares		25,000			25,000			25,000				25,000																						25,000	25,000			25,000	10,000	85,000
Additional Lease Payment for Patented Mining Claims Lease on Each Year																										$ 5,000
Lease Payments Additional Common Shares Issued | shares																										20,000
Cash Payment in Lieu of Issuing Shares Under Lease Agreement																								$ 108,750
Common Stock Issued During Period Shares Issued for Lease Payments | shares																							46,250
Lease Payment for Patended Mining Claims Upon Extend Lease																							$ 10,000
Cash Payment Along with Shares Issued as Lease Payment			$ 34,116		$ 25,655					$ 53,447			$ 19,237			$ 21,200	$ 35,871				$ 126,924
Work Commitments for the First Three Year																										$ 100,000
Work Commitments for the Years 4 to 6																										200,000
Work Commitments for the years 7 to 10																										300,000
Work Commitments for the years 11 to 20																										$ 300,000
Percentage of NSR Royalty Required to Pay If Average Gold Price Less than or Equal to USD400 per Ounce																										2.00%
Percentage of NSR Royalty Required to Pay If Average Gold Price Between USD401 and USD500 per Ounce																										3.00%
Percentage of NSR Royalty Required to Pay if Average Gold Price Greater than USD500 per Ounce																										4.00%
Patented Mining Claims, Agreed to Purchase																			5
Purchase Agreement Payable																			$ 160,000
Price Per Ton Of Overburden to be Stored On Property | $ / T																			0.02
Minimum Storage Capacity of Property | T																			12
Notes Payable, Total																			$ 240,000																	$ 248,832												$ 240,000
Acquisition Costs, Period Cost																																				406,240	$ 400,000
Payments to Acquire Mineral Rights																																				$ 157,408
Number of Patented Sunflower Claims														3
Lease Agreement, Option to Purchase Property, Purcahse Price														$ 300,000
Stock Issued During Period, Shares, Acquisitions | shares		25,000
North Bullfrog [Member] | Corvus Gold Nevada Inc. [Member] | Promissory Note Payable [Member]
Debt Instrument, Interest Rate, Effective Percentage																			4.77%
North Bullfrog [Member] | International Tower Hill Mines Ltd. [Member]
Lease Payments Common Shares Issued | shares			50,000	50,000	50,000					50,000			50,000			50,000	50,000				50,000					25,000
Lease Payments Common Shares Issued Upon Extend Lease | shares																							50,000
Lease Payments Additional Common Shares Issued Upon Extend Lease | shares																							50,000
Land and Water Rights [Member]
Payments to Acquire Mineral Rights																															$ 1,100,118	$ 1,034,626
Mother Lode Property [Member]
Payments to Acquire Mineral Rights
Mother Lode Property [Member] | Goldcorp USA, Inc [Member]
Stock Issued During Period, Shares, Acquisitions | shares							1,000,000
Shares Issued, Price Per Share | $ / shares							$ 0.81
Mother Lode Property [Member] | Goldcorp USA, Inc [Member]
Net Smelter Return, Royalty Percentage of Production Based on Specified Maximum Gold Price							1.00%
Net Smelter Return, Maximum Gold Price | $ / oz							1,400
Net Smelter Return, Additional Royalty Percentage of Production Based on Specified Minimum Gold Price							1.00%
Net Smelter Return, Total Royalty Percentage of Production							2.00%
Net Smelter Return, Minimum Gold Price | $ / oz							1,400

[1] Pursuant to a mining lease and option to purchase agreement made effective December 1, 2007 between Corvus Nevada and a group of arm's length limited partnerships, Corvus Nevada has leased (and has the option to purchase) patented mining claims referred to as the "Mayflower" claims which form part of the North Bullfrog project. The terms of the lease/option are as follows: Terms: Initial term of five years, commencing December 1, 2007, with the option to extend the lease for an additional five years. The lease will continue for as long thereafter as the property is in commercial production or, alternatively, for an additional three years if Corvus Nevada makes advance minimum royalty payments of USD 100,000 per year (which are recoupable against actual production royalties). Pursuant to an extension agreement dated January 15, 2016 and fully executed and effective as of November 22, 2017, the parties agreed to extend the lease and option granted for an additional ten years with the same lease payment terms. Lease Payments: USD 5,000 (paid) and 25,000 common shares of ITH (delivered) following regulatory acceptance of the transaction; and an additional USD 5,000 and 20,000 common shares on each of the first through fourth lease anniversaries (paid and issued). Pursuant to an agreement with the lessors, in lieu of the 20,000 ITH common shares due December 1, 2010, Corvus Nevada paid USD 108,750 on November 10, 2010 and delivered 46,250 common shares of the Company on December 2, 2010. If Corvus Nevada elects to extend the lease for a second five-year term, it will pay USD 10,000 and deliver 50,000 common shares of ITH upon election being made, and an additional 50,000 common shares of ITH on each of the fifth through ninth anniversaries (USD 10,000 paid on October 31, 2012 and 50,000 common shares of ITH delivered on October 25, 2012 paid with cash of $126,924; USD 10,000 paid on November 13, 2013 and 50,000 common shares of ITH delivered on November 25, 2013 paid with cash of $35,871; USD 10,000 paid on November 17, 2014 and 50,000 common shares of ITH delivered on November 7, 2014 paid with cash of $21,200; USD 10,000 paid on November 23, 2015 and 50,000 common shares of ITH delivered on November 5, 2015 paid with cash of $19,237; USD 10,000 paid on November 17, 2016 and 50,000 common shares of ITH, purchased for $53,447 in the market by the Company, were delivered on November 10, 2016; and USD 10,000 paid on November 22, 2017 and 50,000 common shares of ITH, purchased for $25,655 in the market by the Company, were delivered on November 30, 2017; and USD 10,000 paid on November 15, 2018 and 50,000 common shares of ITH, purchased for $34,116 in the market by the Company, were delivered on November 6, 2018). Anti-Dilution: Pursuant to an amended agreement agreed to by the lessors in March 2015, the Company shall deliver a total of 85,000 common shares (issued) of the Company for the years 2011 to 2014 (2011: 10,000 common shares; 2012 to 2014: 25,000 common shares each year). All future payments will be satisfied by the delivery of an additional 1/2 common shares of the Company for each of the ITH common shares due per the original agreement (issued 25,000 common shares of the Company on November 18, 2015; 25,000 shares of the Company on November 18, 2016; 25,000 shares of the Company on November 30, 2017 and 25,000 shares of the Company on November 26, 2018). Work Commitments: USD 100,000 per year for the first three years (incurred), USD 200,000 per year for the years four to six (incurred), USD 300,000 for the years seven to ten (incurred) and USD 300,000 for the years 11 - 20 (incurred). Excess expenditures in any year may be carried forward. If Corvus Nevada does not incur the required expenditures in year one, the deficiency is required to be paid to the lessors. Retained Royalty: Corvus Nevada will pay the lessors a NSR royalty of 2% if the average gold price is USD 400 per ounce or less, 3% if the average gold price is between USD 401 and USD 500 per ounce and 4% if the average gold price is greater than USD 500 per ounce.

[2] North Bullfrog Project, Nevada The Company's North Bullfrog project consists of certain leased patented lode mining claims and federal unpatented mining claims owned 100% by the Company.