Corvus Gold ULC (KOR) 10-K 28 Aug 18 2018 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	May 31, 2018	Aug. 27, 2018	Nov. 30, 2017
Document Information [Line Items]
Entity Registrant Name	Corvus Gold Inc.
Entity Central Index Key	1,507,964
Trading Symbol	corvf
Current Fiscal Year End Date	--05-31
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		105,985,945
Entity Public Float			$ 69,048,395
Document Type	10-K
Document Period End Date	May 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets	May 31, 2018CAD ($)	May 31, 2017CAD ($)
Current assets
Cash and cash equivalents	$ 2,610,541	$ 1,300,553
Accounts receivable	25,438	13,524
Prepaid expenses	256,772	249,176
Total current assets	2,892,751	1,563,253
Property and equipment (note 4)	56,490	69,529
Capitalized acquisition costs (note 5)	5,238,789	4,527,740
Total assets	8,188,030	6,160,522
Current liabilities
Accounts payable and accrued liabilities (note 7)	330,704	293,085
Total current liabilities	330,704	293,085
Asset retirement obligations (note 5)	366,641	340,176
Total liabilities	697,345	633,261
Shareholders’ equity
Share capital (note 6)	83,606,486	72,670,170
Contributed surplus (note 6)	13,030,715	12,480,784
Accumulated other comprehensive income - cumulative translation differences	1,123,410	1,348,070
Deficit accumulated during the exploration stage	(90,269,926)	(80,971,763)
Total shareholders’ equity	7,490,685	5,527,261
Total liabilities and shareholders’ equity	$ 8,188,030	$ 6,160,522

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Loss - CAD ($)	12 Months Ended
	May 31, 2018	May 31, 2017
Administration	$ 422	$ 649
Consulting fees (notes 6 and 7)	625,677	635,152
Depreciation (note 4)	18,020	22,176
Exploration expenditures (notes 5 and 6)	5,333,180	3,145,589
Insurance	201,415	156,940
Investor relations (notes 6 and 7)	909,798	768,098
Office and miscellaneous	132,168	118,161
Professional fees (note 6)	261,428	286,556
Regulatory	96,982	77,155
Rent	99,440	109,201
Travel	213,335	154,391
Wages and benefits (notes 6 and 7)	1,302,813	1,256,749
Total operating expenses	(9,194,678)	(6,730,817)
Other income (expense)
Interest income	20,273	26,501
Foreign exchange loss	(123,758)	(23,406)
Total other income (expense)	(103,485)	3,095
Net loss for the year	(9,298,163)	(6,727,722)
Other comprehensive income (loss)
Exchange difference on translating foreign operations	(224,660)	179,684
Comprehensive loss for the year	$ (9,522,823)	$ (6,548,038)
Basic and diluted net loss per share (in CAD per share)	$ (0.09)	$ (0.07)
Weighted average number of shares outstanding (in shares)	101,298,273	92,045,609

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - CAD ($)	12 Months Ended
	May 31, 2018	May 31, 2017
Operating activities
Net loss for the year	$ (9,298,163)	$ (6,727,722)
Add items not affecting cash:
Depreciation	18,020	22,176
Stock-based compensation (note 6)	673,233	581,379
Foreign exchange loss	123,758	23,406
Changes in non-cash items:
Accounts receivable	(11,914)	15,286
Prepaid expenses	(7,596)	(82,323)
Accounts payable and accrued liabilities	37,619	56,224
Cash used in operating activities	(8,465,043)	(6,111,574)
Financing activities
Cash received from issuance of shares	10,073,362	2,701,000
Share issuance costs	(107,348)	(17,554)
Cash provided by financing activities	9,966,014	2,683,446
Investing activities
Expenditures on property and equipment	(7,710)	(7,739)
Capitalized acquisition costs	(38,384)	(66,876)
Cash used in investing activities	(46,094)	(74,615)
Effect of foreign exchange on cash	(144,889)	19,777
Increase (decrease) in cash and cash equivalents	1,309,988	(3,482,966)
Cash and cash equivalents, beginning of the year	1,300,553	4,783,519
Cash and cash equivalents, end of the year	$ 2,610,541	$ 1,300,553

Consolidated Statement of Chang

Consolidated Statement of Changes in Equity - CAD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at May. 31, 2016	89,594,582
Balance at May. 31, 2016	$ 69,890,670	$ 11,977,459	$ 1,168,386	$ (74,244,041)	$ 8,792,474
Net loss for the year				(6,727,722)	(6,727,722)
Private placement (in shares)	2,550,000
Private placement	$ 2,601,000				$ 2,601,000
Exercise of stock options (in shares)	200,000				200,000
Exercise of stock options	$ 100,000				$ 100,000
Share issued for capitalized acquisition costs (in shares)	25,000
Share issued for capitalized acquisition costs	$ 18,000				18,000	[1]
Exchange difference on translating foreign operations			179,684		179,684
Share issuance costs	(17,554)				(17,554)
Reclassification of contributed surplus on exercise of stock options	$ 78,054	(78,054)
Stock-based compensation		581,379			581,379
Balance (in shares) at May. 31, 2017	92,369,582
Balance at May. 31, 2017	$ 72,670,170	12,480,784	1,348,070	(80,971,763)	5,527,261
Net loss for the year				(9,298,163)	(9,298,163)
Private placement (in shares)	10,603,933
Private placement	$ 9,903,499				$ 9,903,499
Exercise of stock options (in shares)	256,660				256,660
Exercise of stock options	$ 169,863				$ 169,863
Share issued for capitalized acquisition costs (in shares)	1,025,000
Share issued for capitalized acquisition costs	$ 847,000				847,000	[1],[2]
Exchange difference on translating foreign operations			(224,660)		(224,660)
Share issuance costs	(107,348)				(107,348)
Reclassification of contributed surplus on exercise of stock options	123,302	(123,302)
Stock-based compensation		673,233			673,233
Balance (in shares) at May. 31, 2018	104,255,175
Balance at May. 31, 2018	$ 83,606,486	$ 13,030,715	$ 1,123,410	$ (90,269,926)	$ 7,490,685
[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). 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 and 25,000 shares of the Company on November 30, 2017). 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]	Pursuant to a purchase agreement made effective June 9, 2017 between Corvus Nevada and Goldcorp USA, Inc. ("Goldcorp USA"), Corvus Nevada has acquired 100% of the Mother Lode property (the "Mother Lode Property"). In addition, Corvus Nevada staked two additional adjacent claim blocks to the Mother Lode Property. In connection with the acquisition, the Company issued 1,000,000 common shares at a price of $0.81 per common share to Goldcorp USA (note 6). The Mother Lode Property is subject to an NSR in favour of Goldcorp USA. The NSR pays 1% from production at the Mother Lode Property when the price of gold is less than USD 1,400 per ounce and an additional 1% NSR for a total of 2% NSR when gold price is greater than or equal to USD 1,400 per ounce.

Note 1 - Nature and Continuance

Note 1 - Nature and Continuance of Operations	12 Months Ended
	May 31, 2018
Notes to Financial Statements
Nature of Operations [Text Block]	1. NATURE AND CONTINUANCE OF OPERATIONS On August 25, 2010, The Company was incorporated on April 13, 2010 Business Corporations Act June 1, 2006. The Company is engaged in the business of acquiring, exploring and evaluating mineral properties, and either joint venturing or developing these properties further or disposing of them when the evaluation is completed. At May 31, 2018, The business of mining and exploration involves a high degree of risk and there can be no no not These consolidated financial statements have been prepared on a going concern basis, which presume the realization of assets and discharge of liabilities in the normal course of business for the foreseeable future. The Company’s ability to continue as a going concern is dependent upon achieving profitable operations and/or obtaining additional financing. In assessing whether the going concern assumption is appropriate, management takes into account all available information about the future within one The Company has sustained significant losses from operations, has negative cash flows, and has an ongoing requirement for capital investment to explore its mineral properties. As at May 31, 2018, $2,562,047 $1,270,168 May 31, 2017. July 6, 2017, 6,200,000 $0.75 $4,650,000. December 7, 2017, 2,829,130 $1.15 $3,253,499 1,574,803 $1.27 $2,000,000. June 7, 2018, 1,730,770 $2.60 $4,500,002. 18 The Company expects that it will need to raise substantial additional capital to accomplish its business plan over the next several years. There is no not not These consolidated financial statements do not All currency amounts are stated in Canadian dollars unless noted otherwise.

Note 2 - Significant Accounting

Note 2 - Significant Accounting Policies	12 Months Ended
	May 31, 2018
Notes to Financial Statements
Significant Accounting Policies [Text Block]	2. SIGNIFICANT ACCOUNTING POLICIES Basis of presentation These consolidated financial statements are presented in Canadian dollars and have been prepared in accordance with generally accepted accounting principles in the United States (“US GAAP”). Basis of consolidation These consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries (collectively, the “Group”), Corvus Gold (USA) Inc. (“Corvus USA”) (a Nevada corporation), Corvus Gold Nevada Inc. (“Corvus Nevada”) (a Nevada corporation), Raven Gold Alaska Inc. (“Raven Gold”) (an Alaska corporation), SoN Land and Water LLC (“SoN”) (a Nevada limited liability company) and Mother Lode Mining Company LLC (a Nevada limited liability company). All intercompany transactions and balances were eliminated upon consolidation. Significant judgments, estimates and assumptions The preparation of these financial statements in accordance with US GAAP requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and reported amounts of expenses during the reporting year. Actual outcomes could differ from these estimates. These financial statements include estimates which, by their nature, are uncertain. The impacts of such estimates are pervasive throughout the financial statements, and may Significant estimates Significant assumptions about the future and other sources of estimation uncertainty that management has made at the end of the reporting year, that could result in a material adjustment to the carrying amounts of assets and liabilities, in the event that actual results differ from assumptions made, relate to, but are not Significant judgments Critical accounting judgments are accounting policies that have been identified as being complex or involving subjective judgments or assessments. The Company made the following critical accounting judgments: • The determination of deferred tax assets and liabilities. • The analysis of resource calculations, drill results, laboratory work, etc., which can impact the Company’s assessment of impairments, and provisions, if any, for environmental rehabilitation and restorations. • The determination of functional currency. using the currency of the primary economic environment in which each of the parent company and its subsidiaries operates. • The assessment of the Company’s ability to continue as a going concern. Cash and cash equivalents Cash equivalents include highly liquid investments in term deposits that are readily convertible to known amounts of cash with original maturities of three three 30 no Foreign currency translation The presentation currency of the Company is the Canadian dollar. The functional currency of each of the parent company and its subsidiaries is measured using the currency of the primary economic environment in which that entity operates. The functional currency of Corvus USA, Corvus Nevada, Raven Gold, SoN, and Mother Lode Mining Company LLC is US dollars, and for the Company the functional currency is Canadian dollars. Transactions and balances Foreign currency transactions are translated into the functional currency using the exchange rates prevailing at the date of the transaction. Foreign currency monetary items are translated at the year-end exchange rate. Non-monetary items measured at historical cost continue to be carried at the exchange rate at the date of the transaction. Non-monetary items measured at fair value are reported at the exchange rate at the date when fair values were determined. Exchange differences arising on the translation of monetary items or on settlement of monetary items are recognized in profit or loss in the Statement of Operations and Comprehensive Income (Loss) in the year in which they arise. Exchange differences arising on the translation of non-monetary items are recognized in other comprehensive income (loss) in the Statement of Operations and Comprehensive Income (Loss) to the extent that gains and losses arising on those non-monetary items are also recognized in other comprehensive income (loss). Where the non-monetary gain or loss is recognized in profit or loss, the exchange component is also recognized in profit or loss. Parent and Subsidiary Companies The financial results and position of foreign operations whose functional currency is different from the presentation currency are translated as follows: • Assets and liabilities are translated at year-end exchange rates prevailing at that reporting date; and • Income and expenses are translated at monthly average exchange rates during the year. Exchange differences arising on translation of foreign operations are transferred directly to the Group’s exchange difference on translating foreign operations in the Statement of Operations and Comprehensive Income (Loss) and are reported as a separate component of shareholders’ equity titled “Cumulative Translation Differences”. These differences are recognized in profit or loss in the year in which the operation is disposed of. Property and equipment a) Recognition and measurement On initial recognition, property and equipment are valued at cost, being the purchase price and directly attributable costs of acquisition or construction required to bring the asset to the location and condition necessary to be capable of operating in the manner intended by the Company, including appropriate borrowing costs and the estimated present value of any future unavoidable costs of dismantling and removing items. Property and equipment is subsequently measured at cost less accumulated depreciation, less any accumulated impairment losses, with the exception of land which is not When parts of an item of property and equipment have different useful lives, they are accounted for as separate items (major components) of property and equipment. b) Subsequent costs The cost of replacing part of an item of property and equipment is recognized in the carrying amount of the item if it is probable that the future economic benefit embodied within the part will flow to the Company and its cost can be measured reliably. The carrying amount of the replaced part is derecognized. The costs of the day-to-day servicing of property and equipment are recognized in profit or loss as incurred. c) Major maintenance and repairs Subsequent costs are included in the asset’s carrying amount or recognized as a separate asset, as appropriate, only when it is probable that future economic benefits associated with the item will flow to the Company and the cost of the item can be measured reliably. All other repairs and maintenance expenditures are charged to profit or loss during the financial year in which they are incurred. d) Gains and losses Gains and losses on disposal of an item of property and equipment are determined by comparing the proceeds from disposal with the carrying amount, and are recognized net within other items in profit or loss. e) Depreciation Depreciation is recognized in profit or loss on a declining-balance basis at the following annual rates: Computer equipment - 30% Vehicles - 30% Tent - 20% Additions during the year are depreciated at one Depreciation methods, useful lives and residual values are reviewed at each financial year-end and adjusted if appropriate. Mineral properties and exploration and evaluation expenditures The Company’s mineral projects are currently in the exploration and evaluation phase. All direct costs related to the acquisition of mineral property interests are capitalized. Mineral property exploration costs are expensed as incurred. At such time that the Company determines that a mineral property can be economically developed, subsequent mineral property expenses will be capitalized during the development of such property. Impairment of long-lived assets The Company assesses long-lived assets for impairment or when facts and circumstances suggest that the carrying amount of an asset may not, not 50%. Asset retirement obligations The Company records a liability based on the best estimate of costs for site closure and reclamation activities that the Company is legally or contractually required to remediate at the time environmental disturbance occurs. The provision for closure and reclamation liabilities is estimated using expected cash flows based on engineering and environmental reports and accreted to full value over time through periodic charges to profit or loss. As at May 31, 2018, $366,641 283,000 2017 $340,176 252,000 Income taxes The Company accounts for income taxes under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. Under the asset and liability method, the effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is recognized if it is more likely than not not Share capital The proceeds from the exercise of stock options, warrants and escrow shares are recorded as share capital in the amount for which the option, warrant or escrow share enabled the holder to purchase a share in the Company. Commissions paid to agents, and other related share issuance costs, such as legal, auditing, and printing, on the issue of the Company’s shares are charged directly to share capital. Valuation of equity units issued in private placements The Company has adopted a residual value method with respect to the measurement of shares and warrants issued as private placement units. The residual value method first The fair value of the common shares issued in the private placements was determined to be the more easily measurable component and were valued at their fair value, as determined by the closing quoted bid price on the announcement date. The balance, if any, is allocated to the attached warrants. Any fair value attributed to the warrants is recorded as contributed surplus. Upon exercise of the warrants, the related fair value is reallocated to share capital. Earnings (loss) per share Basic loss per share is calculated using the weighted average number of common shares outstanding during the year. The Company uses the treasury stock method to compute the dilutive effect of options, warrants and similar instruments. Under this method, the dilutive effect on earnings (loss) per share is calculated presuming the exercise of outstanding options, warrants and similar instruments. It assumes that the proceeds of such exercise would be used to repurchase common shares at the average market price during the year. However, the calculation of diluted loss per share excludes the effects of various conversions and exercise of options and warrants that would be anti-dilutive. For the year ended May 31, 2018, 9,861,900 2017 8,846,900 not Stock-based compensation The Company follows the provisions of Financial Accounting Standards Board Accounting Standards Codification Section 718 Non-monetary transactions All non-monetary transactions are measured at the fair value of the asset surrendered or the asset received, whichever is more reliable, unless the transaction lacks commercial substance or the fair value cannot be reliably established. The commercial substance requirement is met when the future cash flows are expected to change significantly as a result of the transaction. When the fair value of a non-monetary transaction cannot be reliably measured, it is recorded at the carrying amount (after reduction, when appropriate, for impairment) of the asset given up adjusted by the fair value of any monetary consideration received or given. When the asset received or the consideration given up is shares in an actively traded market, the value of those shares will be considered fair value. Joint venture accounting Where the Company’s exploration and development activities are conducted with others, the accounts reflect only the Company’s proportionate interest in such activities. The Company currently is not

Note 3 - Fair Value of Financia

Note 3 - Fair Value of Financial Instruments	12 Months Ended
	May 31, 2018
Notes to Financial Statements
Fair Value Disclosures [Text Block]	3. FAIR VALUE OF FINANCIAL INSTRUMENTS Financial instruments recorded at fair value are classified using a fair value hierarchy that reflects the significance of the inputs used in making the measurements. The fair value hierarchy has the following levels: Level 1 – valuation based on quoted prices (unadjusted) in active markets for identical assets or liabilities; Level 2 – valuation techniques based on inputs other than quoted prices included in level 1 Level 3 – valuation techniques using inputs for the asset or liability that are not The fair value hierarchy requires the use of observable market inputs whenever such inputs exist. A financial instrument is classified to the lowest level of the hierarchy for which a significant input has been considered in measuring fair value. The following table presents the financial instruments recorded at fair value, classified using the fair value hierarchy described above: May 31, 2018 Level 1 Cash and cash equivalents $ 2,610,541 May 31, 2017 Level 1 Cash and cash equivalents $ 1,300,553

Note 4 - Property and Equipment

Note 4 - Property and Equipment	12 Months Ended
	May 31, 2018
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	4. PROPERTY AND EQUIPMENT Computer Equipment Vehicles Tent Total Cost Balance, May 31, 2016 $ 68,885 $ 89,434 $ 65,550 $ 223,869 Additions 7,739 - - 7,739 Currency translation adjustments 1,717 2,660 1,950 6,327 Balance, May 31, 2017 78,341 92,094 67,500 237,935 Additions 7,710 - - 7,710 Currency translation adjustments (2,432 ) (3,766 ) (2,760 ) (8,958 ) Balance, May 31, 2018 $ 83,619 $ 88,328 $ 64,740 $ 236,687 Depreciation Balance, May 31, 2016 $ 43,495 $ 70,529 $ 27,794 $ 141,818 Depreciation for the year 8,831 5,723 7,622 22,176 Currency translation adjustments 1,218 2,214 980 4,412 Balance, May 31, 2017 53,544 78,466 36,396 168,406 Depreciation for the year 8,312 3,849 5,859 18,020 Currency translation adjustments (1,712 ) (3,137 ) (1,380 ) (6,229 ) Balance, May 31, 2018 $ 60,144 $ 79,178 $ 40,875 $ 180,197 Carrying amounts Balance, May 31, 2017 $ 24,797 $ 13,628 $ 31,104 $ 69,529 Balance, May 31, 2018 $ 23,475 $ 9,150 $ 23,865 $ 56,490

Note 5 - Mineral Properties

Note 5 - Mineral Properties	12 Months Ended
	May 31, 2018
Notes to Financial Statements
Mineral Industries Disclosures [Text Block]	5. MINERAL PROPERTIES The Company had the following activity related to capitalized acquisition costs: North Mother Total (note 5a)) (note 5b)) Balance, May 31, 2016 $ 4,261,680 $ - $ 4,261,680 Acquisition costs Cash payments (note 5a)(ii)(1)) 66,876 - 66,876 Shares issued (note 5a)(ii)(1) and 6) 18,000 - 18,000 Asset retirement obligations 37,865 - 37,865 Currency translation adjustments 143,319 - 143,319 Balance, May 31, 2017 4,527,740 - 4,527,740 Acquisition costs Cash payments (note 5a)(ii)(1)) 38,384 - 38,384 Shares issued (note 5a)(ii)(1), 5b) and 6) 37,000 810,000 847,000 Asset retirement obligations 9,899 30,475 40,374 Currency translation adjustments (184,271 ) (30,438 ) (214,709 ) Balance, May 31, 2018 $ 4,428,752 $ 810,037 $ 5,238,789 The following table presents costs incurred for exploration and evaluation activities for the year ended May 31, 2018: North Mother Total (note 5a)) (note 5b)) Exploration costs: Assay $ 44,703 $ 742,751 $ 787,454 Drilling (3,265 ) 1,885,504 1,882,239 Equipment rental 15,698 89,965 105,663 Field costs 33,310 315,406 348,716 Geological/ Geophysical 80,771 658,575 739,346 Land maintenance & tenure 337,695 144,985 482,680 Permits 9,036 113,246 122,282 Studies 478,904 270,754 749,658 Travel 10,245 104,897 115,142 Total expenditures for the year $ 1,007,097 $ 4,326,083 $ 5,333,180 The following table presents costs incurred for exploration and evaluation activities for the year ended May 31, 2017: North Total (note 5a)) Exploration costs: Assay $ 732,434 $ 732,434 Drilling 1,032,602 1,032,602 Equipment rental 75,554 75,554 Field costs 143,329 143,329 Geological/ Geophysical 328,379 328,379 Land maintenance & tenure 390,343 390,343 Permits 28,019 28,019 Studies 341,218 341,218 Travel 73,711 73,711 Total expenditures for the year $ 3,145,589 $ 3,145,589 a) 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% (i) Interests acquired from Redstar Gold Corp. On October 9, 2009, ( 1 Pursuant to a mining lease and option to purchase agreement made effective October 27, 2008 twelve ten not 10,800 first three 10,800 16,200 October 27, 2017). 1,000,000 4% may 1,250,000 1% 5,000,000 ( 2 Pursuant to a mining lease made and entered into as of May 8, 2006 two three ten 4,000 3,500 May 8, 2007, 2008 2009 4,500 May 8, 2010 May 8, 2018). 2% may 1,000,000 1% 2,000,000 ( 3 Pursuant to a mining lease made and entered into as of May 8, 2006 two ten 2,000 2,000 May 8, 2007, 2008 2009 3,000 May 8, 2010 May 8, 2018). 3% may 850,000 1% 2,550,000 May 29, 2014, 2,400 2,400 May 29, 2015, 2016 2017 3,600 May 29, 2018, May 29, 2018). 3% may 770,000 1% 2,310,000 ( 4 Pursuant to a mining lease made and entered into as of May 16, 2006 twelve ten 20,500 20,000 May 16, 2018). 4% may 1,000,000 1% 4,000,000 ( 5 Pursuant to a mining lease made and entered into as of May 22, 2006 three ten 8,000 4,800 May 22, 2007, 2008 2009 7,200 May 22, 2010 May 22, 2018). 2% may 1,000,000 1% 2,000,000 ( 6 Pursuant to a mining lease made and entered into as of June 16, 2006 one ten 2,000 2,000 June 16, 2007, 2008 2009 3,000 June 16, 2010 June 16, 2018). 2% may 1,000,000 1% 2,000,000 As a consequence of the acquisition of Redstar and Redstar US’s interest in the foregoing leases, Corvus Nevada is now the lessee under all of such leases. (ii) Interests acquired directly by Corvus Nevada ( 1 Pursuant to a mining lease and option to purchase agreement made effective December 1, 2007 Terms five December 1, 2007, five three 100,000 January 15, 2016 November 22, 2017, ten Lease Payments 5,000 25,000 5,000 20,000 first fourth 20,000 December 1, 2010, 108,750 November 10, 2010 46,250 December 2, 2010. second five 10,000 50,000 50,000 fifth ninth 10,000 October 31, 2012 50,000 October 25, 2012 $126,924; 10,000 November 13, 2013 50,000 November 25, 2013 $35,871; 10,000 November 17, 2014 50,000 November 7, 2014 $21,200; 10,000 November 23, 2015 50,000 November 5, 2015 $19,237; 10,000 November 17, 2016 50,000 $53,447 November 10, 2016; 10,000 November 22, 2017 50,000 $25,655 November 30, 2017). Anti-Dilution: March 2015, 85,000 2011 2014 2011: 10,000 2012 2014: 25,000 25,000 November 18, 2015; 25,000 November 18, 2016 25,000 November 30, 2017). Work Commitments 100,000 first three 200,000 four six 300,000 seven ten 300,000 11 20 may not Retained Royalty 2% 400 3% 401 500 4% 500 ( 2 Pursuant to a mining lease and option to purchase made effective March 1, 2011 two ten ten not 20,000 25,000 March 1, 2012 ( 2013 2014 30,000 March 1, 2015 March 1, 2018), 2% may 1,000,000 1%. 2,000,000 ( 3 Pursuant to a purchase agreement made effective March 28, 2013, five two 160,000 March 28, 2013). 0.02 12 240,000 4.77% December 31, 2015 ( December 17, 2015). $406,240 400,000 $157,408 $248,832 240,000 May 31, 2013. ( 4 In December 2013, 30 1,600 $1,100,118 1,034,626 ( 5 On March 30, 2015, three 2014. three seven 5,000 5,000 March 2018). 4% 500,000 1% 2,000,000 4% 300,000. b) Mother Lode Property, Nevada Pursuant to a purchase agreement made effective June 9, 2017 100% two 1,000,000 $0.81 6 1% 1,400 1% 2% 1,400 Acquisitions The acquisition of title to mineral properties is a detailed and time-consuming process. The Company has taken steps, in accordance with industry norms, to verify title to mineral properties in which it has an interest. Although the Company has taken every reasonable precaution to ensure that legal title to its properties is properly recorded in the name of the Company (or, in the case of an option, in the name of the relevant optionor), there can be no Environmental Expenditures The operations of the Company may not Environmental expenditures that relate to ongoing environmental and reclamation programs are charged against earnings as incurred or capitalized and amortized depending on their future economic benefits. Estimated future removal and site restoration costs, when the ultimate liability is reasonably determinable, are charged against earnings over the estimated remaining life of the related business operation, net of expected recoveries. The Company has estimated the fair value of the liability for asset retirement that arose as a result of exploration activities to be $366,641 283,000 May 31, 2017 - $340,176 252,000 not

Note 6 - Share Capital

Note 6 - Share Capital	12 Months Ended
	May 31, 2018
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	6. SHARE CAPITAL Authorized Unlimited common shares without par value. Share issuances During the year ended May 31, 2018: a) On June 9, 2017, 1,000,000 5b $810,000. $7,703 b) On July 6, 2017, 6,200,000 $0.75 $4,650,000. $14,788 c) On November 30, 2017, 25,000 5a 1 $37,000. d) An aggregate of 256,660 256,660 $169,863. e) On December 7, 2017, 2,829,130 $1.15 $3,253,499, 1,574,803 $1.27 $2,000,000. $84,857 During the year ended May 31, 2017: a) On November 18, 2016, 25,000 5a 1 $18,000. b) On July 15, 2016, 2,550,000 $1.02 $2,601,000. $17,554 c) An aggregate of 200,000 200,000 $100,000. Stock options Stock options awarded to employees and non-employees by the Company are measured and recognized in the Consolidated Statement of Operations and Comprehensive Loss over the vesting period. The Company has adopted an incentive stock option plan, first 2010 2013 2010 2010 may 2010 may may not 10% 2010 ten 2010 not 5 5 may 2010 A summary of the status of the stock option plan as of May 31, 2018, 2017, 2018 2017 Number of Weighted Number of Weighted Balance, beginning of the year 8,846,900 $ 0.87 7,981,000 $ 0.85 Granted 1,840,000 0.77 1,135,000 1.02 Exercised (256,660 ) (0.66 ) (200,000 ) (0.50 ) Forfeited (568,340 ) (0.93 ) (69,100 ) (0.93 ) Balance, end of the year 9,861,900 $ 0.85 8,846,900 $ 0.87 The weighted average remaining contractual life of options outstanding at May 31, 2018 1.74 2017 1.85 Stock options outstanding are as follows: 2018 2017 Expiry Date Exercise Number Exercisable Exercise Number of Exercisable November 17, 2016* $ - - - $ 0.67 210,000 210,000 May 1, 2017* $ - - - $ 0.73 50,000 50,000 May 29, 2017* $ - - - $ 0.92 300,000 300,000 September 19, 2017* $ 0.96 1,966,900 1,966,900 $ 0.96 2,016,900 2,016,900 October 29, 2017 $ - - - $ 0.96 100,000 100,000 August 16, 2018* $ 0.76 2,095,000 2,095,000 $ 0.76 2,120,000 2,120,000 September 8, 2019 $ 1.40 1,250,000 1,250,000 $ 1.40 1,265,000 1,265,000 September 9, 2020 $ 0.46 625,000 625,000 $ 0.46 640,000 426,240 November 13, 2020 $ 0.49 1,000,000 1,000,000 $ 0.49 1,010,000 672,660 June 22, 2018 $ - - - $ 1.02 50,000 33,300 September 15, 2021 $ 0.91 1,085,000 722,610 $ 0.91 1,085,000 361,305 July 31, 2022 $ 0.77 1,840,000 - $ - - - 9,861,900 7,659,510 8,846,900 7,555,405 *The Company’s share trading policy (the “Policy”) requires that all restricted persons and others who are subject to the Policy refrain from conducting any transactions involving the purchase or sale of the Company’s securities, during the period in any quarter commencing 30 2010 not not ten The Company uses the fair value method for determining stock-based compensation for all options granted during the years. The fair value of options granted was $951,067 2017 $691,819 For the year ended May 31, 2018 2017 Risk-free interest rate 1.65 % 0.71 % Expected life of options (in years) 5 4.87 Annualized volatility 79.14 % 85.96 % Dividend yield 0 % 0 % Exercise price $ 0.77 $ 0.91 Fair value per share $ 0.52 $ 0.61 Annualized volatility was determined by reference to historic volatility of the Company. Stock-based compensation has been allocated to the same expenses as cash compensation paid to the same employees or consultants, as follows: For the year ended May 31, 2018 2017 Consulting fees $ 306,510 $ 301,884 Exploration expenditures – Geological/geophysical 55,464 33,433 Investor relations 92,351 73,514 Professional fees 7,332 6,777 Wages and benefits 211,576 165,771 $ 673,233 $ 581,379

Note 7 - Related Party Transact

Note 7 - Related Party Transactions	12 Months Ended
	May 31, 2018
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	7. RELATED PARTY TRANSACTIONS The Company entered into the following transactions with related parties: For the year ended May 31, 2018 2017 Consulting fees to CFO $ 124,167 $ 110,000 Wages and benefits to CEO and COO 880,520 790,187 Directors fees (included in consulting fees) 154,000 148,250 Fees to former Vice President of Corporate Communications (included in investor relations) - 137,500 Stock-based compensation to related parties 494,777 476,664 $ 1,653,464 $ 1,662,601 As at May 31, 2018, $15,537 2017 $18,271 These amounts were unsecured, non-interest bearing and had no not The Company has also entered into change of control agreements with officers of the Company. In the case of termination, the officers are entitled to an amount equal to a multiple (ranging from two three one

Note 8 - Geographic Segmented I

Note 8 - Geographic Segmented Information	12 Months Ended
	May 31, 2018
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	8. GEOGRAPHIC SEGMENTED INFORMATION The Company operates in one two Canada United States Total May 31, 2018 Capitalized acquisition costs $ - $ 5,238,789 $ 5,238,789 Property and equipment $ 11,200 $ 45,290 $ 56,490 May 31, 2017 Capitalized acquisition costs $ - $ 4,527,740 $ 4,527,740 Property and equipment $ 8,367 $ 61,162 $ 69,529 For the year ended May 31, 2018 2017 Net loss for the year – Canada $ (2,552,140 ) $ (2,138,433 ) Net loss for the year – United States (6,746,023 ) (4,589,289 ) Net loss for the year $ (9,298,163 ) $ (6,727,722 )

Note 9 - Subsidiaries

Note 9 - Subsidiaries	12 Months Ended
	May 31, 2018
Notes to Financial Statements
Subsidiaries [Text Block]	9. SUBSIDIARIES Significant subsidiaries for the years ended May 31, 2018 2017 Country of Principal The Company’s The Company’s Corvus Gold (USA) Inc. USA Holding company 100 % 100 % Raven Gold Alaska Inc. USA Exploration company 100 % 100 % Corvus Gold Nevada Inc. USA Exploration company 100 % 100 % SoN Land & Water LLC USA Exploration company 100 % 100 % Mother Lode Mining Company LLC USA Exploration company 100 % N/A

Note 10 - Supplemental Cash Flo

Note 10 - Supplemental Cash Flow Information	12 Months Ended
	May 31, 2018
Notes to Financial Statements
Cash Flow, Supplemental Disclosures [Text Block]	10. SUPPLEMENTAL CASH FLOW INFORMATION For the year ended May 31, 2018 2017 Supplemental cash flow information Interest paid $ - $ - Income taxes paid (received) $ - $ - Non-cash financing and investing transactions Shares issued to acquire mineral properties $ 847,000 $ 18,000 Change in asset retirement obligations included in capitalized acquisition costs $ 40,374 $ 37,865 Reclassification of contributed surplus on exercise of stock options $ 123,302 $ 78,054

Note 11 - Income Taxes

Note 11 - Income Taxes	12 Months Ended
	May 31, 2018
Notes to Financial Statements
Income Tax Disclosure [Text Block]	11. INCOME TAXES A reconciliation of income taxes at statutory rates with the reported taxes is as follows for the years ended May 31: 2018 2017 Loss before income taxes $ (9,298,163 ) $ (6,727,722 ) Statutory Canadian corporate tax rate 26.42 % 26.00 % Income tax recovery at statutory rates $ (2,456,264 ) $ (1,749,208 ) Stock-based compensation 177,846 151,159 Effect of tax rate change (109,857 ) - Difference in tax rates in other jurisdictions (522,120 ) (374,370 ) Tax benefits not realized 2,910,395 1,972,419 Income tax recovery $ - $ - The significant components of the Company’s deferred income tax assets and liabilities are as follows: 2018 2017 Deferred income tax assets (liabilities) Mineral properties $ 18,619,000 $ 17,495,000 Property and equipment 42,000 38,000 Share issuance costs 40,000 32,000 Non-capital losses available for future periods 8,378,000 7,476,000 27,079,000 25,041,000 Valuation allowance (27,079,000 ) (25,041,000 ) Net deferred tax assets $ - $ - At May 31, 2018, $11,377,000 $15,626,000 not Canada United States 2029 $ - $ 1,238,000 2030 - 1,000 2031 379,000 184,000 2032 1,089,000 1,576,000 2033 1,443,000 2,080,000 2034 1,733,000 4,052,000 2035 1,806,000 1,882,000 2036 1,354,000 1,857,000 2037 1,624,000 1,304,000 2038 1,949,000 1,452,000 $ 11,377,000 $ 15,626,000 In addition, the Company has available mineral resource expenses that are related to the Company’s exploration activities in the United States of approximately $59,385,000 $333,000, may may not

Note 12 - Subsequent Event

Note 12 - Subsequent Event	12 Months Ended
	May 31, 2018
Notes to Financial Statements
Subsequent Events [Text Block]	12. SUBSEQUENT EVENT On June 7, 2018, 1,730,770 $2.60 $4,500,002.

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	May 31, 2018
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of presentation These consolidated financial statements are presented in Canadian dollars and have been prepared in accordance with generally accepted accounting principles in the United States (“US GAAP”).
Consolidation, Policy [Policy Text Block]	Basis of consolidation These consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries (collectively, the “Group”), Corvus Gold (USA) Inc. (“Corvus USA”) (a Nevada corporation), Corvus Gold Nevada Inc. (“Corvus Nevada”) (a Nevada corporation), Raven Gold Alaska Inc. (“Raven Gold”) (an Alaska corporation), SoN Land and Water LLC (“SoN”) (a Nevada limited liability company) and Mother Lode Mining Company LLC (a Nevada limited liability company). All intercompany transactions and balances were eliminated upon consolidation.
Use of Estimates, Policy [Policy Text Block]	Significant judgments, estimates and assumptions The preparation of these financial statements in accordance with US GAAP requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and reported amounts of expenses during the reporting year. Actual outcomes could differ from these estimates. These financial statements include estimates which, by their nature, are uncertain. The impacts of such estimates are pervasive throughout the financial statements, and may Significant estimates Significant assumptions about the future and other sources of estimation uncertainty that management has made at the end of the reporting year, that could result in a material adjustment to the carrying amounts of assets and liabilities, in the event that actual results differ from assumptions made, relate to, but are not Significant judgments Critical accounting judgments are accounting policies that have been identified as being complex or involving subjective judgments or assessments. The Company made the following critical accounting judgments: • The determination of deferred tax assets and liabilities. • The analysis of resource calculations, drill results, laboratory work, etc., which can impact the Company’s assessment of impairments, and provisions, if any, for environmental rehabilitation and restorations. • The determination of functional currency. using the currency of the primary economic environment in which each of the parent company and its subsidiaries operates. • The assessment of the Company’s ability to continue as a going concern.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and cash equivalents Cash equivalents include highly liquid investments in term deposits that are readily convertible to known amounts of cash with original maturities of three three 30 no
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign currency translation The presentation currency of the Company is the Canadian dollar. The functional currency of each of the parent company and its subsidiaries is measured using the currency of the primary economic environment in which that entity operates. The functional currency of Corvus USA, Corvus Nevada, Raven Gold, SoN, and Mother Lode Mining Company LLC is US dollars, and for the Company the functional currency is Canadian dollars. Transactions and balances Foreign currency transactions are translated into the functional currency using the exchange rates prevailing at the date of the transaction. Foreign currency monetary items are translated at the year-end exchange rate. Non-monetary items measured at historical cost continue to be carried at the exchange rate at the date of the transaction. Non-monetary items measured at fair value are reported at the exchange rate at the date when fair values were determined. Exchange differences arising on the translation of monetary items or on settlement of monetary items are recognized in profit or loss in the Statement of Operations and Comprehensive Income (Loss) in the year in which they arise. Exchange differences arising on the translation of non-monetary items are recognized in other comprehensive income (loss) in the Statement of Operations and Comprehensive Income (Loss) to the extent that gains and losses arising on those non-monetary items are also recognized in other comprehensive income (loss). Where the non-monetary gain or loss is recognized in profit or loss, the exchange component is also recognized in profit or loss. Parent and Subsidiary Companies The financial results and position of foreign operations whose functional currency is different from the presentation currency are translated as follows: • Assets and liabilities are translated at year-end exchange rates prevailing at that reporting date; and • Income and expenses are translated at monthly average exchange rates during the year. Exchange differences arising on translation of foreign operations are transferred directly to the Group’s exchange difference on translating foreign operations in the Statement of Operations and Comprehensive Income (Loss) and are reported as a separate component of shareholders’ equity titled “Cumulative Translation Differences”. These differences are recognized in profit or loss in the year in which the operation is disposed of.
Property, Plant and Equipment, Policy [Policy Text Block]	Property and equipment a) Recognition and measurement On initial recognition, property and equipment are valued at cost, being the purchase price and directly attributable costs of acquisition or construction required to bring the asset to the location and condition necessary to be capable of operating in the manner intended by the Company, including appropriate borrowing costs and the estimated present value of any future unavoidable costs of dismantling and removing items. Property and equipment is subsequently measured at cost less accumulated depreciation, less any accumulated impairment losses, with the exception of land which is not When parts of an item of property and equipment have different useful lives, they are accounted for as separate items (major components) of property and equipment. b) Subsequent costs The cost of replacing part of an item of property and equipment is recognized in the carrying amount of the item if it is probable that the future economic benefit embodied within the part will flow to the Company and its cost can be measured reliably. The carrying amount of the replaced part is derecognized. The costs of the day-to-day servicing of property and equipment are recognized in profit or loss as incurred. c) Major maintenance and repairs Subsequent costs are included in the asset’s carrying amount or recognized as a separate asset, as appropriate, only when it is probable that future economic benefits associated with the item will flow to the Company and the cost of the item can be measured reliably. All other repairs and maintenance expenditures are charged to profit or loss during the financial year in which they are incurred. d) Gains and losses Gains and losses on disposal of an item of property and equipment are determined by comparing the proceeds from disposal with the carrying amount, and are recognized net within other items in profit or loss. e) Depreciation Depreciation is recognized in profit or loss on a declining-balance basis at the following annual rates: Computer equipment - 30% Vehicles - 30% Tent - 20% Additions during the year are depreciated at one Depreciation methods, useful lives and residual values are reviewed at each financial year-end and adjusted if appropriate.
Capitalization of Internal Costs, Policy [Policy Text Block]	Mineral properties and exploration and evaluation expenditures The Company’s mineral projects are currently in the exploration and evaluation phase. All direct costs related to the acquisition of mineral property interests are capitalized. Mineral property exploration costs are expensed as incurred. At such time that the Company determines that a mineral property can be economically developed, subsequent mineral property expenses will be capitalized during the development of such property.
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment of long-lived assets The Company assesses long-lived assets for impairment or when facts and circumstances suggest that the carrying amount of an asset may not, not 50%.
Asset Retirement Obligation [Policy Text Block]	Asset retirement obligations The Company records a liability based on the best estimate of costs for site closure and reclamation activities that the Company is legally or contractually required to remediate at the time environmental disturbance occurs. The provision for closure and reclamation liabilities is estimated using expected cash flows based on engineering and environmental reports and accreted to full value over time through periodic charges to profit or loss. As at May 31, 2018, $366,641 283,000 2017 $340,176 252,000
Income Tax, Policy [Policy Text Block]	Income taxes The Company accounts for income taxes under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. Under the asset and liability method, the effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is recognized if it is more likely than not not
Share Capital [Policy Text Block]	Share capital The proceeds from the exercise of stock options, warrants and escrow shares are recorded as share capital in the amount for which the option, warrant or escrow share enabled the holder to purchase a share in the Company. Commissions paid to agents, and other related share issuance costs, such as legal, auditing, and printing, on the issue of the Company’s shares are charged directly to share capital.
Equity Method Investments Issuances, Policy [Policy Text Block]	Valuation of equity units issued in private placements The Company has adopted a residual value method with respect to the measurement of shares and warrants issued as private placement units. The residual value method first The fair value of the common shares issued in the private placements was determined to be the more easily measurable component and were valued at their fair value, as determined by the closing quoted bid price on the announcement date. The balance, if any, is allocated to the attached warrants. Any fair value attributed to the warrants is recorded as contributed surplus. Upon exercise of the warrants, the related fair value is reallocated to share capital.
Earnings Per Share, Policy [Policy Text Block]	Earnings (loss) per share Basic loss per share is calculated using the weighted average number of common shares outstanding during the year. The Company uses the treasury stock method to compute the dilutive effect of options, warrants and similar instruments. Under this method, the dilutive effect on earnings (loss) per share is calculated presuming the exercise of outstanding options, warrants and similar instruments. It assumes that the proceeds of such exercise would be used to repurchase common shares at the average market price during the year. However, the calculation of diluted loss per share excludes the effects of various conversions and exercise of options and warrants that would be anti-dilutive. For the year ended May 31, 2018, 9,861,900 2017 8,846,900 not
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	Stock-based compensation The Company follows the provisions of Financial Accounting Standards Board Accounting Standards Codification Section 718
Non-monetary Transactions [Policy Text Block]	Non-monetary transactions All non-monetary transactions are measured at the fair value of the asset surrendered or the asset received, whichever is more reliable, unless the transaction lacks commercial substance or the fair value cannot be reliably established. The commercial substance requirement is met when the future cash flows are expected to change significantly as a result of the transaction. When the fair value of a non-monetary transaction cannot be reliably measured, it is recorded at the carrying amount (after reduction, when appropriate, for impairment) of the asset given up adjusted by the fair value of any monetary consideration received or given. When the asset received or the consideration given up is shares in an actively traded market, the value of those shares will be considered fair value.
Interest in Unincorporated Joint Ventures or Partnerships, Policy [Policy Text Block]	Joint venture accounting Where the Company’s exploration and development activities are conducted with others, the accounts reflect only the Company’s proportionate interest in such activities. The Company currently is not

Note 3 - Fair Value of Financ19

Note 3 - Fair Value of Financial Instruments (Tables)	12 Months Ended
	May 31, 2018
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	May 31, 2018 Level 1 Cash and cash equivalents $ 2,610,541 May 31, 2017 Level 1 Cash and cash equivalents $ 1,300,553

Note 4 - Property and Equipme20

Note 4 - Property and Equipment (Tables)	12 Months Ended
	May 31, 2018
Notes Tables
Property, Plant and Equipment [Table Text Block]	Computer Equipment Vehicles Tent Total Cost Balance, May 31, 2016 $ 68,885 $ 89,434 $ 65,550 $ 223,869 Additions 7,739 - - 7,739 Currency translation adjustments 1,717 2,660 1,950 6,327 Balance, May 31, 2017 78,341 92,094 67,500 237,935 Additions 7,710 - - 7,710 Currency translation adjustments (2,432 ) (3,766 ) (2,760 ) (8,958 ) Balance, May 31, 2018 $ 83,619 $ 88,328 $ 64,740 $ 236,687 Depreciation Balance, May 31, 2016 $ 43,495 $ 70,529 $ 27,794 $ 141,818 Depreciation for the year 8,831 5,723 7,622 22,176 Currency translation adjustments 1,218 2,214 980 4,412 Balance, May 31, 2017 53,544 78,466 36,396 168,406 Depreciation for the year 8,312 3,849 5,859 18,020 Currency translation adjustments (1,712 ) (3,137 ) (1,380 ) (6,229 ) Balance, May 31, 2018 $ 60,144 $ 79,178 $ 40,875 $ 180,197 Carrying amounts Balance, May 31, 2017 $ 24,797 $ 13,628 $ 31,104 $ 69,529 Balance, May 31, 2018 $ 23,475 $ 9,150 $ 23,865 $ 56,490

Note 5 - Mineral Properties (Ta

Note 5 - Mineral Properties (Tables)	12 Months Ended
	May 31, 2018
Notes Tables
Capitalized Costs Relating to Acquisition Activities Disclosure [Table Text Block]	North Mother Total (note 5a)) (note 5b)) Balance, May 31, 2016 $ 4,261,680 $ - $ 4,261,680 Acquisition costs Cash payments (note 5a)(ii)(1)) 66,876 - 66,876 Shares issued (note 5a)(ii)(1) and 6) 18,000 - 18,000 Asset retirement obligations 37,865 - 37,865 Currency translation adjustments 143,319 - 143,319 Balance, May 31, 2017 4,527,740 - 4,527,740 Acquisition costs Cash payments (note 5a)(ii)(1)) 38,384 - 38,384 Shares issued (note 5a)(ii)(1), 5b) and 6) 37,000 810,000 847,000 Asset retirement obligations 9,899 30,475 40,374 Currency translation adjustments (184,271 ) (30,438 ) (214,709 ) Balance, May 31, 2018 $ 4,428,752 $ 810,037 $ 5,238,789
Cost Incurred in Acquisition Exploration and Evaluation Activities Disclosure [Table Text Block]	North Mother Total (note 5a)) (note 5b)) Exploration costs: Assay $ 44,703 $ 742,751 $ 787,454 Drilling (3,265 ) 1,885,504 1,882,239 Equipment rental 15,698 89,965 105,663 Field costs 33,310 315,406 348,716 Geological/ Geophysical 80,771 658,575 739,346 Land maintenance & tenure 337,695 144,985 482,680 Permits 9,036 113,246 122,282 Studies 478,904 270,754 749,658 Travel 10,245 104,897 115,142 Total expenditures for the year $ 1,007,097 $ 4,326,083 $ 5,333,180 North Total (note 5a)) Exploration costs: Assay $ 732,434 $ 732,434 Drilling 1,032,602 1,032,602 Equipment rental 75,554 75,554 Field costs 143,329 143,329 Geological/ Geophysical 328,379 328,379 Land maintenance & tenure 390,343 390,343 Permits 28,019 28,019 Studies 341,218 341,218 Travel 73,711 73,711 Total expenditures for the year $ 3,145,589 $ 3,145,589

Note 6 - Share Capital (Tables)

Note 6 - Share Capital (Tables)	12 Months Ended
	May 31, 2018
Notes Tables
Share-based Compensation, Stock Options, Activity [Table Text Block]	2018 2017 Number of Weighted Number of Weighted Balance, beginning of the year 8,846,900 $ 0.87 7,981,000 $ 0.85 Granted 1,840,000 0.77 1,135,000 1.02 Exercised (256,660 ) (0.66 ) (200,000 ) (0.50 ) Forfeited (568,340 ) (0.93 ) (69,100 ) (0.93 ) Balance, end of the year 9,861,900 $ 0.85 8,846,900 $ 0.87
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	2018 2017 Expiry Date Exercise Number Exercisable Exercise Number of Exercisable November 17, 2016* $ - - - $ 0.67 210,000 210,000 May 1, 2017* $ - - - $ 0.73 50,000 50,000 May 29, 2017* $ - - - $ 0.92 300,000 300,000 September 19, 2017* $ 0.96 1,966,900 1,966,900 $ 0.96 2,016,900 2,016,900 October 29, 2017 $ - - - $ 0.96 100,000 100,000 August 16, 2018* $ 0.76 2,095,000 2,095,000 $ 0.76 2,120,000 2,120,000 September 8, 2019 $ 1.40 1,250,000 1,250,000 $ 1.40 1,265,000 1,265,000 September 9, 2020 $ 0.46 625,000 625,000 $ 0.46 640,000 426,240 November 13, 2020 $ 0.49 1,000,000 1,000,000 $ 0.49 1,010,000 672,660 June 22, 2018 $ - - - $ 1.02 50,000 33,300 September 15, 2021 $ 0.91 1,085,000 722,610 $ 0.91 1,085,000 361,305 July 31, 2022 $ 0.77 1,840,000 - $ - - - 9,861,900 7,659,510 8,846,900 7,555,405
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	For the year ended May 31, 2018 2017 Risk-free interest rate 1.65 % 0.71 % Expected life of options (in years) 5 4.87 Annualized volatility 79.14 % 85.96 % Dividend yield 0 % 0 % Exercise price $ 0.77 $ 0.91 Fair value per share $ 0.52 $ 0.61
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]	For the year ended May 31, 2018 2017 Consulting fees $ 306,510 $ 301,884 Exploration expenditures – Geological/geophysical 55,464 33,433 Investor relations 92,351 73,514 Professional fees 7,332 6,777 Wages and benefits 211,576 165,771 $ 673,233 $ 581,379

Note 7 - Related Party Transa23

Note 7 - Related Party Transactions (Tables)	12 Months Ended
	May 31, 2018
Notes Tables
Schedule of Related Party Transactions [Table Text Block]	For the year ended May 31, 2018 2017 Consulting fees to CFO $ 124,167 $ 110,000 Wages and benefits to CEO and COO 880,520 790,187 Directors fees (included in consulting fees) 154,000 148,250 Fees to former Vice President of Corporate Communications (included in investor relations) - 137,500 Stock-based compensation to related parties 494,777 476,664 $ 1,653,464 $ 1,662,601

Note 8 - Geographic Segmented24

Note 8 - Geographic Segmented Information (Tables)	12 Months Ended
	May 31, 2018
Notes Tables
Long-lived Assets by Geographic Areas [Table Text Block]	Canada United States Total May 31, 2018 Capitalized acquisition costs $ - $ 5,238,789 $ 5,238,789 Property and equipment $ 11,200 $ 45,290 $ 56,490 May 31, 2017 Capitalized acquisition costs $ - $ 4,527,740 $ 4,527,740 Property and equipment $ 8,367 $ 61,162 $ 69,529
Net Income (Loss) by Geographic Areas [Table Text Block]	For the year ended May 31, 2018 2017 Net loss for the year – Canada $ (2,552,140 ) $ (2,138,433 ) Net loss for the year – United States (6,746,023 ) (4,589,289 ) Net loss for the year $ (9,298,163 ) $ (6,727,722 )

Note 9 - Subsidiaries (Tables)

Note 9 - Subsidiaries (Tables)	12 Months Ended
	May 31, 2018
Notes Tables
Schedule of Significant Subsidiaries [Table Text Block]	Country of Principal The Company’s The Company’s Corvus Gold (USA) Inc. USA Holding company 100 % 100 % Raven Gold Alaska Inc. USA Exploration company 100 % 100 % Corvus Gold Nevada Inc. USA Exploration company 100 % 100 % SoN Land & Water LLC USA Exploration company 100 % 100 % Mother Lode Mining Company LLC USA Exploration company 100 % N/A

Note 10 - Supplemental Cash F26

Note 10 - Supplemental Cash Flow Information (Tables)	12 Months Ended
	May 31, 2018
Notes Tables
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	For the year ended May 31, 2018 2017 Supplemental cash flow information Interest paid $ - $ - Income taxes paid (received) $ - $ - Non-cash financing and investing transactions Shares issued to acquire mineral properties $ 847,000 $ 18,000 Change in asset retirement obligations included in capitalized acquisition costs $ 40,374 $ 37,865 Reclassification of contributed surplus on exercise of stock options $ 123,302 $ 78,054

Note 11 - Income Taxes (Tables)

Note 11 - Income Taxes (Tables)	12 Months Ended
	May 31, 2018
Notes Tables
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	2018 2017 Loss before income taxes $ (9,298,163 ) $ (6,727,722 ) Statutory Canadian corporate tax rate 26.42 % 26.00 % Income tax recovery at statutory rates $ (2,456,264 ) $ (1,749,208 ) Stock-based compensation 177,846 151,159 Effect of tax rate change (109,857 ) - Difference in tax rates in other jurisdictions (522,120 ) (374,370 ) Tax benefits not realized 2,910,395 1,972,419 Income tax recovery $ - $ -
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	2018 2017 Deferred income tax assets (liabilities) Mineral properties $ 18,619,000 $ 17,495,000 Property and equipment 42,000 38,000 Share issuance costs 40,000 32,000 Non-capital losses available for future periods 8,378,000 7,476,000 27,079,000 25,041,000 Valuation allowance (27,079,000 ) (25,041,000 ) Net deferred tax assets $ - $ -
Summary of Tax Credit Carryforwards [Table Text Block]	Canada United States 2029 $ - $ 1,238,000 2030 - 1,000 2031 379,000 184,000 2032 1,089,000 1,576,000 2033 1,443,000 2,080,000 2034 1,733,000 4,052,000 2035 1,806,000 1,882,000 2036 1,354,000 1,857,000 2037 1,624,000 1,304,000 2038 1,949,000 1,452,000 $ 11,377,000 $ 15,626,000

Note 1 - Nature and Continuan28

Note 1 - Nature and Continuance of Operations (Details Textual) - CAD ($)	Jun. 07, 2018	Dec. 07, 2017	Jul. 06, 2017	Jul. 15, 2016	May 31, 2018	May 31, 2017
Working Capital					$ 2,562,047	$ 1,270,168
Proceeds from Issuance of Private Placement			$ 4,650,000	$ 2,601,000
Private Placement [Member]
Stock Issued During Period, Shares, New Issues			6,200,000	2,550,000
Sale of Stock, Price Per Share			$ 0.75
Proceeds from Issuance of Private Placement			$ 4,650,000
Private Placement [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues	1,730,770
Sale of Stock, Price Per Share	$ 2.60
Proceeds from Issuance of Private Placement	$ 4,500,002
Private Placement 1 [Member]
Stock Issued During Period, Shares, New Issues		2,829,130
Sale of Stock, Price Per Share		$ 1.15
Proceeds from Issuance of Private Placement		$ 3,253,499
Private Placement 2 [Member]
Stock Issued During Period, Shares, New Issues		1,574,803
Sale of Stock, Price Per Share		$ 1.27
Proceeds from Issuance of Private Placement		$ 2,000,000

Note 2 - Significant Accounti29

Note 2 - Significant Accounting Policies (Details Textual)	12 Months Ended
	May 31, 2018USD ($)shares	May 31, 2017USD ($)shares	May 31, 2018CAD ($)	May 31, 2017CAD ($)
Asset Retirement Obligations, Noncurrent, Total	$ 283,000	$ 252,000	$ 366,641	$ 340,176
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	9,861,900	8,846,900
Computer Equipment [Member]
Property, Plant and Equipment, Depreciation Methods	30%
Vehicles [Member]
Property, Plant and Equipment, Depreciation Methods	30%
Tent [Member]
Property, Plant and Equipment, Depreciation Methods	20%

Note 3 - Fair Value of Financ30

Note 3 - Fair Value of Financial Instruments - Financial Instruments Recorded at Fair Value (Details) - CAD ($)	May 31, 2018	May 31, 2017
Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	$ 2,610,541	$ 1,300,553

Note 4 - Property and Equipme31

Note 4 - Property and Equipment - Property and Equipment (Details) - CAD ($)	12 Months Ended
	May 31, 2018	May 31, 2017
Cost, Balance	$ 237,935	$ 223,869
Additions	7,710	7,739
Currency translation adjustments	(8,958)	6,327
Cost, Balance	236,687	237,935
Accumulated depreciation, Balance	168,406	141,818
Depreciation	18,020	22,176
Currency translation adjustments	(6,229)	4,412
Accumulated depreciation, Balance	180,197	168,406
Carrying amounts	56,490	69,529
Computer Equipment [Member]
Cost, Balance	78,341	68,885
Additions	7,710	7,739
Currency translation adjustments	(2,432)	1,717
Cost, Balance	83,619	78,341
Accumulated depreciation, Balance	53,544	43,495
Depreciation	8,312	8,831
Currency translation adjustments	(1,712)	1,218
Accumulated depreciation, Balance	60,144	53,544
Carrying amounts	23,475	24,797
Vehicles [Member]
Cost, Balance	92,094	89,434
Additions		0
Currency translation adjustments	(3,766)	2,660
Cost, Balance	88,328	92,094
Accumulated depreciation, Balance	78,466	70,529
Depreciation	3,849	5,723
Currency translation adjustments	(3,137)	2,214
Accumulated depreciation, Balance	79,178	78,466
Carrying amounts	9,150	13,628
Tent [Member]
Cost, Balance	67,500	65,550
Additions		0
Currency translation adjustments	(2,760)	1,950
Cost, Balance	64,740	67,500
Accumulated depreciation, Balance	36,396	27,794
Depreciation	5,859	7,622
Currency translation adjustments	(1,380)	980
Accumulated depreciation, Balance	40,875	36,396
Carrying amounts	$ 23,865	$ 31,104

Note 5 - Mineral Properties (De

Note 5 - Mineral Properties (Details Textual) $ / shares in Units, T in Millions		Nov. 30, 2017CAD ($)shares	Nov. 22, 2017USD ($)	Jun. 09, 2017$ / shares$ / itemshares	Nov. 18, 2016shares	Nov. 17, 2016USD ($)	Nov. 10, 2016CAD ($)shares	Nov. 23, 2015USD ($)	Nov. 18, 2015shares	Nov. 05, 2015CAD ($)shares	Mar. 30, 2015USD ($)	Nov. 17, 2014USD ($)	Nov. 07, 2014CAD ($)shares	Nov. 25, 2013CAD ($)shares	Nov. 13, 2013USD ($)	Mar. 28, 2013USD ($)T$ / T	Oct. 31, 2012USD ($)	Oct. 25, 2012CAD ($)shares	Mar. 01, 2011USD ($)	Dec. 02, 2010USD ($)shares	Nov. 10, 2010USD ($)	Oct. 27, 2008USD ($)	Dec. 01, 2007USD ($)shares	Jun. 16, 2006USD ($)	May 22, 2006USD ($)	May 16, 2006USD ($)	May 08, 2006USD ($)	Dec. 31, 2013USD ($)a	Dec. 31, 2013CAD ($)a	Feb. 28, 2018	May 31, 2018CAD ($)	May 31, 2017CAD ($)	Dec. 31, 2014shares	Dec. 31, 2013ashares	May 31, 2013USD ($)	May 31, 2013CAD ($)	Dec. 31, 2012shares	Dec. 31, 2011shares	Mar. 31, 2015shares	May 31, 2018USD ($)	May 31, 2018CAD ($)	May 31, 2017USD ($)	May 31, 2017CAD ($)	Mar. 31, 2017USD ($)	Mar. 01, 2015USD ($)	May 29, 2014USD ($)	Mar. 01, 2014USD ($)	May 31, 2013CAD ($)	Mar. 01, 2013USD ($)	Mar. 01, 2012USD ($)
Payments to Acquire Mineral Rights	[1]																														$ 38,384	$ 66,876
Stock Issued During Period, Shares, Acquisitions | shares					25,000
Asset Retirement Obligations, Noncurrent, Total																																								$ 283,000	$ 366,641	$ 252,000	$ 340,176
North Bullfrog [Member]
Unpatented Mineral Claims																														100.00%
Payments to Acquire Mineral Rights	[1]																														38,384	66,876
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 Two Years																											2,000																			2,400
Capital Leases, Future Minimum Payments Due in Four Years																											2,000																			2,400
Capital Leases, Future Minimum Payments Due in Five Years																											$ 3,000																			$ 3,600
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 Two Years																								2,000	4,800		3,500
Capital Leases, Future Minimum Payments Due in Four Years																								2,000	4,800		3,500
Capital Leases, Future Minimum Payments Due in Five Years																								$ 3,000	$ 7,200		$ 4,500
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						$ 5,000
Lease Payments Common Shares Issued | shares		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		$ 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
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																			$ 240,000													$ 248,832
Acquisition Costs, Period Cost																																			$ 400,000	$ 406,240
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					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																												$ 1,034,626	$ 1,100,118
Mother Lode Property [Member]
Payments to Acquire Mineral Rights	[1]
Stock Issued During Period, Shares, Acquisitions | shares				1,000,000
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 | $ / item				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 | $ / item				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). 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 and 25,000 shares of the Company on November 30, 2017). 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.

Note 5 - Mineral Properties - A

Note 5 - Mineral Properties - Activity Related to Capitalized Acquisition Costs (Details) - CAD ($)		Jun. 09, 2017	Nov. 18, 2016	May 31, 2018		May 31, 2017
Balance				$ 4,527,740		$ 4,261,680
Cash payments (note 5a)(ii)(1))	[1]			38,384		66,876
Share issued for capitalized acquisition costs			$ 18,000	847,000	[1],[2]	18,000	[1]
Asset retirement obligations				40,374		37,865
Currency translation adjustments				(214,709)		143,319
Balance				5,238,789		4,527,740
North Bullfrog [Member]
Balance				4,527,740		4,261,680
Cash payments (note 5a)(ii)(1))	[1]			38,384		66,876
Share issued for capitalized acquisition costs	[1]			37,000	[2]	18,000
Asset retirement obligations				9,899		37,865
Currency translation adjustments				(184,271)		143,319
Balance				4,428,752		4,527,740
Mother Lode Property [Member]
Balance
Cash payments (note 5a)(ii)(1))	[1]
Share issued for capitalized acquisition costs		$ 810,000		810,000	[1],[2]		[1]
Asset retirement obligations				30,475
Currency translation adjustments				(30,438)
Balance				$ 810,037
[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). 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 and 25,000 shares of the Company on November 30, 2017). 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]	Pursuant to a purchase agreement made effective June 9, 2017 between Corvus Nevada and Goldcorp USA, Inc. ("Goldcorp USA"), Corvus Nevada has acquired 100% of the Mother Lode property (the "Mother Lode Property"). In addition, Corvus Nevada staked two additional adjacent claim blocks to the Mother Lode Property. In connection with the acquisition, the Company issued 1,000,000 common shares at a price of $0.81 per common share to Goldcorp USA (note 6). The Mother Lode Property is subject to an NSR in favour of Goldcorp USA. The NSR pays 1% from production at the Mother Lode Property when the price of gold is less than USD 1,400 per ounce and an additional 1% NSR for a total of 2% NSR when gold price is greater than or equal to USD 1,400 per ounce.

Note 5 - Mineral Properties - C

Note 5 - Mineral Properties - Costs Incurred for Exploration and Evaluation Activities (Details) - CAD ($)	12 Months Ended
	May 31, 2018	May 31, 2017
Exploration expenditures (notes 5 and 6)	$ 5,333,180	$ 3,145,589
North Bullfrog [Member]
Exploration expenditures (notes 5 and 6)	1,007,097	3,145,589
Mother Lode Property [Member]
Exploration expenditures (notes 5 and 6)	4,326,083
Assay [Member]
Exploration expenditures (notes 5 and 6)	787,454	732,434
Assay [Member] | North Bullfrog [Member]
Exploration expenditures (notes 5 and 6)	44,703	732,434
Assay [Member] | Mother Lode Property [Member]
Exploration expenditures (notes 5 and 6)	742,751
Drilling [Member]
Exploration expenditures (notes 5 and 6)	1,882,239	1,032,602
Drilling [Member] | North Bullfrog [Member]
Exploration expenditures (notes 5 and 6)		1,032,602
Costs Recovered for Exploration and Evaluation Activities, Gross	(3,265)
Drilling [Member] | Mother Lode Property [Member]
Exploration expenditures (notes 5 and 6)	1,885,504
Equipment rental [Member]
Exploration expenditures (notes 5 and 6)	105,663	75,554
Equipment rental [Member] | North Bullfrog [Member]
Exploration expenditures (notes 5 and 6)	15,698	75,554
Equipment rental [Member] | Mother Lode Property [Member]
Exploration expenditures (notes 5 and 6)	89,965
Field Costs [Member]
Exploration expenditures (notes 5 and 6)	348,716	143,329
Field Costs [Member] | North Bullfrog [Member]
Exploration expenditures (notes 5 and 6)	33,310	143,329
Field Costs [Member] | Mother Lode Property [Member]
Exploration expenditures (notes 5 and 6)	315,406
Geological Geophysical [Member]
Exploration expenditures (notes 5 and 6)	739,346	328,379
Geological Geophysical [Member] | North Bullfrog [Member]
Exploration expenditures (notes 5 and 6)	80,771	328,379
Geological Geophysical [Member] | Mother Lode Property [Member]
Exploration expenditures (notes 5 and 6)	658,575
Land Maintenance and Tenure [Member]
Exploration expenditures (notes 5 and 6)	482,680	390,343
Land Maintenance and Tenure [Member] | North Bullfrog [Member]
Exploration expenditures (notes 5 and 6)	337,695	390,343
Land Maintenance and Tenure [Member] | Mother Lode Property [Member]
Exploration expenditures (notes 5 and 6)	144,985
Permits [Member]
Exploration expenditures (notes 5 and 6)	122,282	28,019
Permits [Member] | North Bullfrog [Member]
Exploration expenditures (notes 5 and 6)	9,036	28,019
Permits [Member] | Mother Lode Property [Member]
Exploration expenditures (notes 5 and 6)	113,246
Studies [Member]
Exploration expenditures (notes 5 and 6)	749,658	341,218
Studies [Member] | North Bullfrog [Member]
Exploration expenditures (notes 5 and 6)	478,904	341,218
Studies [Member] | Mother Lode Property [Member]
Exploration expenditures (notes 5 and 6)	270,754
Travel [Member]
Exploration expenditures (notes 5 and 6)	115,142	73,711
Travel [Member] | North Bullfrog [Member]
Exploration expenditures (notes 5 and 6)	10,245	$ 73,711
Travel [Member] | Mother Lode Property [Member]
Exploration expenditures (notes 5 and 6)	$ 104,897

Note 6 - Share Capital (Details

Note 6 - Share Capital (Details Textual) - CAD ($)		Dec. 07, 2017	Nov. 30, 2017	Jul. 06, 2017	Jun. 09, 2017	Nov. 18, 2016	Jul. 15, 2016	May 31, 2018		May 31, 2017
Stock Issued During Period, Shares, Acquisitions						25,000
Stock Issued During Period, Value, Acquisitions						$ 18,000		$ 847,000	[1],[2]	$ 18,000	[1]
Payments of Stock Issuance Costs					$ 7,703			$ 107,348		$ 17,554
Proceeds from Issuance of Private Placement				$ 4,650,000			$ 2,601,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period								256,660		200,000
Proceeds from Stock Options Exercised								$ 169,863		$ 100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term								1 year 270 days		1 year 310 days
Employee Stock Option [Member]
Stock Granted, Value, Share-based Compensation, Gross								$ 951,067		$ 691,819
Employee Stock Option, Expiring on November 17, 2016 [Member]
Options Exercisable Period, After Restrictions Lifted								10 days
The 2010 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period								256,660		200,000
The 2010 Plan [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum								10.00%
The 2010 Plan [Member] | Employee Stock Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period								10 years
Private Placement [Member]
Payments of Stock Issuance Costs		$ 84,857		$ 14,788			$ 17,554
Stock Issued During Period, Shares, New Issues				6,200,000			2,550,000
Sale of Stock, Price Per Share				$ 0.75
Proceeds from Issuance of Private Placement				$ 4,650,000
Shares Issued, Price Per Share							$ 1.02
Private Placement 1 [Member]
Stock Issued During Period, Shares, New Issues		2,829,130
Sale of Stock, Price Per Share		$ 1.15
Proceeds from Issuance of Private Placement		$ 3,253,499
Shares Issued, Price Per Share		$ 1.15
Private Placement 2 [Member]
Stock Issued During Period, Shares, New Issues		1,574,803
Sale of Stock, Price Per Share		$ 1.27
Proceeds from Issuance of Private Placement		$ 2,000,000
Shares Issued, Price Per Share		$ 1.27
Mother Lode Property [Member]
Stock Issued During Period, Shares, Acquisitions					1,000,000
Stock Issued During Period, Value, Acquisitions					$ 810,000			$ 810,000	[1],[2]		[1]
North Bullfrog [Member]
Stock Issued During Period, Value, Acquisitions	[1]							$ 37,000	[2]	$ 18,000
North Bullfrog [Member] | Corvus Gold Nevada Inc. [Member]
Stock Issued During Period, Shares, Acquisitions			25,000
Stock Issued During Period, Value, Acquisitions			$ 37,000
[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). 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 and 25,000 shares of the Company on November 30, 2017). 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]	Pursuant to a purchase agreement made effective June 9, 2017 between Corvus Nevada and Goldcorp USA, Inc. ("Goldcorp USA"), Corvus Nevada has acquired 100% of the Mother Lode property (the "Mother Lode Property"). In addition, Corvus Nevada staked two additional adjacent claim blocks to the Mother Lode Property. In connection with the acquisition, the Company issued 1,000,000 common shares at a price of $0.81 per common share to Goldcorp USA (note 6). The Mother Lode Property is subject to an NSR in favour of Goldcorp USA. The NSR pays 1% from production at the Mother Lode Property when the price of gold is less than USD 1,400 per ounce and an additional 1% NSR for a total of 2% NSR when gold price is greater than or equal to USD 1,400 per ounce.

Note 6 - Share Capital - Summar

Note 6 - Share Capital - Summary of the Status of the Stock Option Plan (Details) - $ / shares	12 Months Ended
	May 31, 2018	May 31, 2017
Number of Options, Balance (in shares)	8,846,900
Weighted Average Exercise Price, Balance (in CAD per share)	$ 0
Number of Options, Exercised (in shares)	(256,660)	(200,000)
Number of Options, Balance (in shares)	9,861,900	8,846,900
Weighted Average Exercise Price, Balance (in CAD per share)		$ 0
The 2010 Plan [Member]
Number of Options, Balance (in shares)	8,846,900	7,981,000
Weighted Average Exercise Price, Balance (in CAD per share)	$ 0.87	$ 0.85
Number of Options, Granted (in shares)	1,840,000	1,135,000
Weighted Average Exercise Price, Granted (in CAD per share)	$ 0.77	$ 1.02
Number of Options, Exercised (in shares)	(256,660)	(200,000)
Weighted Average Exercise Price, Exercised (in CAD per share)	$ (0.66)	$ (0.50)
Number of Options, Forfeited (in shares)	(568,340)	(69,100)
Weighted Average Exercise Price, Forfeited (in CAD per share)	$ (0.93)	$ (0.93)
Number of Options, Balance (in shares)	9,861,900	8,846,900
Weighted Average Exercise Price, Balance (in CAD per share)	$ 0.85	$ 0.87

Note 6 - Share Capital - Stock

Note 6 - Share Capital - Stock Options Outstanding (Details) - $ / shares		May 31, 2018	May 31, 2017
Exercise Price (in CAD per share)			$ 0
Number of Options (in shares)		9,861,900	8,846,900
Exercisable at Year- End (in shares)		7,659,510	7,555,405
Employee Stock Option, Expiring on November 17, 2016 [Member]
Exercise Price (in CAD per share)	[1]	$ 0	$ 0.67
Number of Options (in shares)	[1]	0	210,000
Exercisable at Year- End (in shares)	[1]	0	210,000
Employee Stock Option, Expiring on May 1, 2017 [Member]
Exercise Price (in CAD per share)	[1]		$ 0.73
Number of Options (in shares)	[1]		50,000
Exercisable at Year- End (in shares)	[1]		50,000
Employee Stock Option, Expiring on May 29, 2017 [Member]
Exercise Price (in CAD per share)	[1]		$ 0.92
Number of Options (in shares)	[1]	0	300,000
Exercisable at Year- End (in shares)	[1]	0	300,000
Employee Stock Option, Expiring on September 19, 2017 [Member]
Exercise Price (in CAD per share)	[1]	$ 0.96	$ 0.96
Number of Options (in shares)	[1]	1,966,900	2,016,900
Exercisable at Year- End (in shares)	[1]	1,966,900	2,016,900
Employee Stock Option, Expiring on October 29, 2017 [Member]
Exercise Price (in CAD per share)			$ 0.96
Number of Options (in shares)			100,000
Exercisable at Year- End (in shares)			100,000
Employee Stock Option, Expiring on August 16, 2018 [Member]
Exercise Price (in CAD per share)		$ 0.76	$ 0.76
Number of Options (in shares)		2,095,000	2,120,000
Exercisable at Year- End (in shares)		2,095,000	2,120,000
Employee Stock Option, Expiring On September 8, 2019 [Member]
Exercise Price (in CAD per share)		$ 1.40	$ 1.40
Number of Options (in shares)		1,250,000	1,265,000
Exercisable at Year- End (in shares)		1,250,000	1,265,000
Employee Stock Option, Expiring on September 9, 2020 [Member]
Exercise Price (in CAD per share)		$ 0.46	$ 0.46
Number of Options (in shares)		625,000	640,000
Exercisable at Year- End (in shares)		625,000	426,240
Employee Stock Option, Expiring on November 13, 2020 [Member]
Exercise Price (in CAD per share)		$ 0.49	$ 0.49
Number of Options (in shares)		1,000,000	1,010,000
Exercisable at Year- End (in shares)		1,000,000	672,660
Employee Stock Option, Expiring On June 22, 2018 [Member]
Exercise Price (in CAD per share)			$ 1.02
Number of Options (in shares)			50,000
Exercisable at Year- End (in shares)			33,300
Employee Stock Option, Expiring on September 15, 2021 [Member]
Exercise Price (in CAD per share)		$ 0.91	$ 0.91
Number of Options (in shares)		1,085,000	1,085,000
Exercisable at Year- End (in shares)		722,610	361,305
Employee Stock Option, Expiring on July 31, 2022 [Member]
Exercise Price (in CAD per share)		$ 0.77	$ 0
Number of Options (in shares)		1,840,000	0
Exercisable at Year- End (in shares)		0	0
[1]	The Company's share trading policy (the "Policy") requires that all restricted persons and others who are subject to the Policy refrain from conducting any transactions involving the purchase or sale of the Company's securities, during the period in any quarter commencing 30 days prior to the scheduled issuance of the next quarter or year-end public disclosure of the financial results as well as when there is material data on hand. In accordance with the terms of the Amended 2010 Plan, if stock options are set to expire during a restricted period and are not exercised prior to any such restriction, they will not expire but instead will be available for exercise for ten days after such restrictions are lifted.

Note 6 - Share Capital - Valuat

Note 6 - Share Capital - Valuation Assumptions for Stock Options (Details) - Employee Stock Option [Member] - $ / shares	12 Months Ended
	May 31, 2018	May 31, 2017
Risk-free interest rate	1.65%	0.71%
Expected life of options (in years) (Year)	5 years	4 years 317 days
Annualized volatility	79.14%	85.96%
Dividend yield	0.00%	0.00%
Exercise price (in CAD per share)	$ 0.77	$ 0.91
Fair value per share (in CAD per share)	$ 0.52	$ 0.61

Note 6 - Share Capital - Alloca

Note 6 - Share Capital - Allocation of Stock-based Compensation Expenses (Details) - CAD ($)	12 Months Ended
	May 31, 2018	May 31, 2017
Share-based Compensation	$ 673,233	$ 581,379
Consulting fees [Member]
Share-based Compensation	306,510	301,884
Exploration expenditures - Geological/geophysical [Member]
Share-based Compensation	55,464	33,433
Investor relations [Member]
Share-based Compensation	92,351	73,514
Professional Fees [Member]
Share-based Compensation	7,332	6,777
Wages and Benefits [Member]
Share-based Compensation	$ 211,576	$ 165,771

Note 7 - Related Party Transa40

Note 7 - Related Party Transactions (Details Textual) - CAD ($)	May 31, 2018	May 31, 2017
Accounts Payable and Accrued Liabilities, Total	$ 15,537	$ 18,271

Note 7 - Related Party Transa41

Note 7 - Related Party Transactions - Transactions With Related Parties (Details) - CAD ($)	12 Months Ended
	May 31, 2018	May 31, 2017
Consulting fees to CFO	$ 625,677	$ 635,152
Fees to former Vice President of Corporate Communications (included in investor relations)		137,500
Share-based Compensation	673,233	581,379
Management compensation	1,653,464	1,662,601
Related Party Transaction [Member]
Share-based Compensation	494,777	476,664
Related Party Transaction [Member] | Chief Financial Officer [Member]
Consulting fees to CFO	124,167	110,000
Related Party Transaction [Member] | Chief Executive Officer [Member]
Wages and benefits	880,520	790,187
Related Party Transaction [Member] | Director [Member]
Directors fees (included in consulting fees)	$ 154,000	$ 148,250

Note 8 - Geographic Segmented42

Note 8 - Geographic Segmented Information (Details Textual)	12 Months Ended
	May 31, 2018
Number of Operating Segments	1
Number of Reportable Segments	2

Note 8 - Geographic Segmented43

Note 8 - Geographic Segmented Information - Long-lived Assets, by Geographical Areas (Details) - CAD ($)	May 31, 2018	May 31, 2017	May 31, 2016
Capitalized acquisition costs	$ 5,238,789	$ 4,527,740	$ 4,261,680
Property and equipment	56,490	69,529
Operating Segments [Member]
Capitalized acquisition costs	5,238,789	4,527,740
Property and equipment	56,490	69,529
CANADA | Operating Segments [Member]
Capitalized acquisition costs	0	0
Property and equipment	11,200	8,367
UNITED STATES | Operating Segments [Member]
Capitalized acquisition costs	5,238,789	4,527,740
Property and equipment	$ 45,290	$ 61,162

Note 8 - Geographic Segmented44

Note 8 - Geographic Segmented Information - Net Income (Loss) by Geographic Areas (Details) - CAD ($)	12 Months Ended
	May 31, 2018	May 31, 2017
Net loss for the year	$ (9,298,163)	$ (6,727,722)
CANADA
Net loss for the year	(2,552,140)	(2,138,433)
UNITED STATES
Net loss for the year	$ (6,746,023)	$ (4,589,289)

Note 9 - Subsidiaries - Signifi

Note 9 - Subsidiaries - Significant Subsidiaries (Details)	12 Months Ended
	May 31, 2018	May 31, 2017
Corvus Gold (USA) Inc. [Member]
Country of Incorporation	USA
Principal Activity	Holding company
Effective Interest	100.00%	100.00%
Raven Gold Alaska Inc. [Member]
Country of Incorporation	USA
Principal Activity	Exploration company
Effective Interest	100.00%	100.00%
Corvus Gold Nevada Inc. [Member]
Country of Incorporation	USA
Principal Activity	Exploration company
Effective Interest	100.00%	100.00%
SoN Land and Water LLC [Member]
Country of Incorporation	USA
Principal Activity	Exploration company
Effective Interest	100.00%	100.00%
Mother Lode Mining Company LLC [Member]
Country of Incorporation	USA
Principal Activity	Exploration company
Effective Interest	100.00%

Note 10 - Supplemental Cash F46

Note 10 - Supplemental Cash Flow Information - Supplemental Cash Flow Information (Details) - CAD ($)	12 Months Ended
	May 31, 2018	May 31, 2017
Interest paid
Income taxes paid (received)
Shares issued to acquire mineral properties	847,000	18,000
Change in asset retirement obligations included in capitalized acquisition costs	40,374	37,865
Reclassification of contributed surplus on exercise of stock options	$ 123,302	$ 78,054

Note 11 - Income Taxes (Details

Note 11 - Income Taxes (Details Textual)	May 31, 2018CAD ($)
CANADA
Operating Loss Carryforwards, Total	$ 11,377,000
CANADA | Mineral, Exploration [Member]
Unrecognized Tax Benefits, Ending Balance	333,000
UNITED STATES
Operating Loss Carryforwards, Total	15,626,000
UNITED STATES | Mineral, Exploration [Member]
Unrecognized Tax Benefits, Ending Balance	$ 59,385,000

Note 11 - Income Taxes - Reconc

Note 11 - Income Taxes - Reconciliation of Income Taxes (Details) - CAD ($)	12 Months Ended
	May 31, 2018	May 31, 2017
Net loss for the year	$ (9,298,163)	$ (6,727,722)
Statutory Canadian corporate tax rate	26.42%	26.00%
Income tax recovery at statutory rates	$ (2,456,264)	$ (1,749,208)
Stock-based compensation	177,846	151,159
Effect of tax rate change	(109,857)
Difference in tax rates in other jurisdictions	(522,120)	(374,370)
Tax benefits not realized	2,910,395	1,972,419
Income tax recovery	$ 0	$ 0

Note 11 - Income Taxes - Compon

Note 11 - Income Taxes - Components of Deferred Income Tax Assets and Liabilities (Details) - CAD ($)	May 31, 2018	May 31, 2017
Mineral properties	$ 18,619,000	$ 17,495,000
Property and equipment	42,000	38,000
Share issuance costs	40,000	32,000
Non-capital losses available for future periods	8,378,000	7,476,000
Deferred Tax Assets, Gross	27,079,000	25,041,000
Valuation allowance	(27,079,000)	(25,041,000)
Net deferred tax assets

Note 11 - Income Taxes - Tax Cr

Note 11 - Income Taxes - Tax Credit Carryforwards (Details)	May 31, 2018CAD ($)
CANADA
Tax Credit Carry-forward, Amount	$ 11,377,000
UNITED STATES
Tax Credit Carry-forward, Amount	15,626,000
Tax Year 2029 [Member] | CANADA
Tax Credit Carry-forward, Amount
Tax Year 2029 [Member] | UNITED STATES
Tax Credit Carry-forward, Amount	1,238,000
Tax Year 2030 [Member] | CANADA
Tax Credit Carry-forward, Amount
Tax Year 2030 [Member] | UNITED STATES
Tax Credit Carry-forward, Amount	1,000
Tax Year 2031 [Member] | CANADA
Tax Credit Carry-forward, Amount	379,000
Tax Year 2031 [Member] | UNITED STATES
Tax Credit Carry-forward, Amount	184,000
Tax Year 2032 [Member] | CANADA
Tax Credit Carry-forward, Amount	1,089,000
Tax Year 2032 [Member] | UNITED STATES
Tax Credit Carry-forward, Amount	1,576,000
Tax Year 2033 [Member] | CANADA
Tax Credit Carry-forward, Amount	1,443,000
Tax Year 2033 [Member] | UNITED STATES
Tax Credit Carry-forward, Amount	2,080,000
Tax Year 2034 [Member] | CANADA
Tax Credit Carry-forward, Amount	1,733,000
Tax Year 2034 [Member] | UNITED STATES
Tax Credit Carry-forward, Amount	4,052,000
Tax Year 2035 [Member] | CANADA
Tax Credit Carry-forward, Amount	1,806,000
Tax Year 2035 [Member] | UNITED STATES
Tax Credit Carry-forward, Amount	1,882,000
Tax Year 2036 [Member] | CANADA
Tax Credit Carry-forward, Amount	1,354,000
Tax Year 2036 [Member] | UNITED STATES
Tax Credit Carry-forward, Amount	1,857,000
Tax Year 2037 [Member] | CANADA
Tax Credit Carry-forward, Amount	1,624,000
Tax Year 2037 [Member] | UNITED STATES
Tax Credit Carry-forward, Amount	1,304,000
Tax Year 2038 [Member] | CANADA
Tax Credit Carry-forward, Amount	1,949,000
Tax Year 2038 [Member] | UNITED STATES
Tax Credit Carry-forward, Amount	$ 1,452,000

Note 12 - Subsequent Event (Det

Note 12 - Subsequent Event (Details Textual) - CAD ($)	Jun. 07, 2018	Jul. 06, 2017	Jul. 15, 2016
Proceeds from Issuance of Private Placement		$ 4,650,000	$ 2,601,000
Private Placement [Member]
Stock Issued During Period, Shares, New Issues		6,200,000	2,550,000
Sale of Stock, Price Per Share		$ 0.75
Proceeds from Issuance of Private Placement		$ 4,650,000
Subsequent Event [Member] | Private Placement [Member]
Stock Issued During Period, Shares, New Issues	1,730,770
Sale of Stock, Price Per Share	$ 2.60
Proceeds from Issuance of Private Placement	$ 4,500,002