Corvus Gold ULC (KOR) 10-Q 9 Apr 15 2015 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Feb. 28, 2015	Apr. 09, 2015
Document Information [Line Items]
Entity Registrant Name	Corvus Gold Inc.
Entity Central Index Key	1507964
Current Fiscal Year End Date	-26
Entity Filer Category	Smaller Reporting Company
Trading Symbol	CORVF
Entity Common Stock, Shares Outstanding		80,168,928
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	28-Feb-15
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2015

CONDENSED_INTERIM_CONSOLIDATED

CONDENSED INTERIM CONSOLIDATED BALANCE SHEETS(CAD)	Feb. 28, 2015	31-May-14
Current assets
Cash and cash equivalents	6,979,295	3,227,970
Marketable securities (note 4)	102,525	147,451
Accounts receivable	27,005	16,787
Prepaid expenses	246,691	217,316
Total current assets	7,355,516	3,609,524
Property and equipment (note 5)	104,764	97,447
Reclamation bond (note 6)	0	522,332
Capitalized acquisition costs (note 7)	4,658,168	4,045,115
Total assets	12,118,448	8,274,418
Current liabilities
Accounts payable and accrued liabilities (note 10)	242,383	622,950
Promissory note payable (note 8)	300,072	0
Total current liabilities	542,455	622,950
Promissory note payable (note 8)	0	260,208
Total liabilities	542,455	883,158
Shareholders' equity
Share capital (note 9)	64,210,099	53,703,440
Contributed surplus	10,907,064	9,768,967
Accumulated other comprehensive income - cumulative translation differences	892,464	151,192
Deficit accumulated during the exploration stage	-64,433,634	-56,232,339
Total shareholders' equity	11,575,993	7,391,260
Total liabilities and shareholders' equity	12,118,448	8,274,418

CONDENSED_INTERIM_CONSOLIDATED1

CONDENSED INTERIM CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (CAD)	3 Months Ended		9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014
Expenses
Administration	3,368	2,921	9,541	8,040
Consulting fees (notes 9 and 10)	235,627	196,134	609,566	517,836
Depreciation	7,293	5,134	20,697	14,976
Exploration expenditures (notes 7 and 9)	648,083	1,464,662	4,440,272	6,246,256
Insurance	29,005	11,084	59,819	39,138
Investor relations (notes 9 and 10)	278,180	325,946	733,262	913,436
Office and miscellaneous	38,376	36,548	109,561	105,960
Professional fees (notes 9 and 10)	83,574	125,422	411,616	329,344
Regulatory	62,791	53,441	148,484	82,470
Rent	24,049	23,633	71,871	69,916
Travel	45,387	21,277	107,237	83,662
Wages and benefits (notes 9 and 10)	674,956	693,672	1,494,033	1,470,210
Total operating expenses	-2,130,689	-2,959,874	-8,215,959	-9,881,244
Other income (expense)
Interest income	5,737	5,026	16,130	38,457
Gain on sale of capitalized acquisition cost	0	1,840,480	0	1,840,480
Unrealized loss on marketable securities	-16,855	0	-60,305	0
Foreign exchange gain (loss)	-6,517	26,703	58,839	-3,949
Total other income (expense)	-17,635	1,872,209	14,664	1,874,988
Net loss for the period	-2,148,324	-1,087,665	-8,201,295	-8,006,256
Other comprehensive income
Exchange difference on translating foreign operations	471,967	259,533	741,272	376,635
Comprehensive loss for the period	-1,676,357	-828,132	-7,460,023	-7,629,621
Basic and diluted loss per share (in dollars per share)	-0.03	-0.02	-0.11	-0.12
Weighted average number of shares outstanding (in shares)	75,679,518	70,415,028	73,961,563	67,005,687

CONDENSED_INTERIM_CONSOLIDATED2

CONDENSED INTERIM CONSOLIDATED STATEMENTS OF CASH FLOWS (CAD)	9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014
Operating activities
Net loss for the period	-8,201,295	-8,006,256
Add items not affecting cash:
Depreciation	20,697	14,976
Stock-based compensation (note 9)	1,145,473	1,361,513
Gain on sale of capitalized acquisition costs	0	-1,840,480
Unrealized loss on marketable securities	60,305	0
(Gain) loss on foreign exchange	-58,839	3,949
Changes in non-cash items:
Accounts receivable	-10,218	10,393
Prepaid expenses	-29,375	327,859
Accounts payable and accrued liabilities	-380,567	-18,802
Cash used in operating activities	-7,453,819	-8,146,848
Financing activities
Cash received from issuance of shares	10,689,450	5,278,300
Share issuance costs	-190,167	-40,312
Cash provided by financing activities	10,499,283	5,237,988
Investing activities
Expenditures on property and equipment	-13,822	-1,706
Refund of (payment of) reclamation bond	522,332	-3,203
Cash received from sale of capitalized acquisition costs	0	1,976,580
Capitalized acquisition costs	0	-1,135,989
Cash provided by investing activities	508,510	835,682
Effect of foreign exchange on cash	197,351	94,173
Increase (decrease) in cash and cash equivalents	3,751,325	-1,979,005
Cash and cash equivalents, beginning of the period	3,227,970	7,867,270
Cash and cash equivalents, end of the period	6,979,295	5,888,265

CONDENSED_INTERIM_CONSOLIDATED3

CONDENSED INTERIM CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (CAD)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]
Balance at May. 31, 2014	7,391,260	53,703,440	9,768,967	151,192	-56,232,339
Balance (in shares) at May. 31, 2014		70,415,028
Net loss for the period	-8,201,295	0	0	0	-8,201,295
Other comprehensive income
Exchange difference on translating foreign operations	741,272	0	0	741,272	0
Shares issued for cash
Public offering	6,180,000	6,180,000	0	0	0
Public offering (in shares)		5,150,000
Private placement	4,500,000	4,500,000	0	0	0
Private placement (in shares)		4,500,000
Exercise of stock options	9,450	9,450	0	0	0
Exercise of stock options (in shares)	18,900	18,900
Share issuance costs	-190,167	-190,167	0	0	0
Reclassification of contributed surplus on exercise of stock options	0	7,376	-7,376	0	0
Stock-based compensation	1,145,473	0	1,145,473	0	0
Balance at Feb. 28, 2015	11,575,993	64,210,099	10,907,064	892,464	-64,433,634
Balance (in shares) at Feb. 28, 2015		80,083,928

PLAN_OF_ARRANGEMENT_AND_TRANSF

PLAN OF ARRANGEMENT AND TRANSFER OF ASSETS	9 Months Ended
	Feb. 28, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]		1	PLAN OF ARRANGEMENT AND TRANSFER OF ASSETS
	On August 25, 2010, International Tower Hill Mines Ltd. (“ITH”) completed a Plan of Arrangement (the “Arrangement”) under the British Columbia Business Corporations Act (“BCBCA”) whereby its existing Alaska mineral properties (other than the Livengood project) and related assets and the North Bullfrog mineral property and related assets in Nevada (collectively, the “Nevada and Other Alaska Business”) were indirectly spun out into a new public company, being Corvus Gold Inc. (“Corvus” or the “Company”).
	The Arrangement was approved by the board of directors of each of ITH and Corvus and by the shareholders of ITH and was accepted for filing by the Toronto Stock Exchange (“TSX”) on behalf of both ITH and Corvus. In connection with the completion of the Arrangement, the common shares of Corvus were listed on the TSX.
	Under the Arrangement, each shareholder of ITH received (as a return of capital) one Corvus common share for every two ITH common shares held as at the effective date of the Arrangement and exchanged each old common share of ITH for a new common share of ITH. As part of the Arrangement, ITH transferred its wholly-owned subsidiary Corvus Gold Nevada Inc. (formerly Talon Gold Nevada Inc.) (“Corvus Nevada”), incorporated in Nevada, United States (which held the North Bullfrog property), to Corvus and a wholly-owned Alaskan subsidiary of ITH sold to Raven Gold Alaska Inc. (“Raven Gold”), incorporated in Alaska, United States, a wholly owned subsidiary of Corvus, the Terra, Chisna, LMS and West Pogo properties. As a consequence of the completion of the Arrangement, Corvus now holds the Terra, Chisna, LMS, West Pogo and North Bullfrog properties (the “Spin-out Properties”).
	The Company’s consolidated financial statements reflect the Balance Sheets and Statement of Changes in Equity of the Nevada and Other Alaska Business as if Corvus existed in its present form since the inception of the business on June 1, 2006. The financial statements have been presented under the predecessor basis of accounting with Balance Sheet amounts based on the amounts recorded by ITH. Management cautions readers of these financial statements that the allocation of expenses does not necessarily reflect future general and administrative expenses.
	The deficit of the Company at August 25, 2010 was calculated on the basis of the ratio of costs incurred on the Spin-out Properties in each period as compared to the costs incurred on all mineral properties of ITH in each of these periods to the cumulative transactions relating to the Spin-out Properties from the date of acquisition of those mineral properties to August 25, 2010 and includes an allocation of ITH’s general and administrative expenses from the date of acquisition of those mineral properties to August 25, 2010. The allocation of general and administrative expense was calculated on the basis of the ratio of costs incurred on the Spin-out Properties in each prior year as compared to the costs incurred on all mineral properties and exploration costs of ITH in each of those prior years. Subsequent to August 25, 2010, ITH has not incurred any expenses on behalf of Corvus and therefore, no allocation of ITH expenses subsequent to that date has occurred.

NATURE_AND_CONTINUANCE_OF_OPER

NATURE AND CONTINUANCE OF OPERATIONS	9 Months Ended
	Feb. 28, 2015
Accounting Policies [Abstract]
Nature of Operations [Text Block]		2	NATURE AND CONTINUANCE OF OPERATIONS
	The Company was incorporated on April 13, 2010 under the British Columbia Business Corporations Act. These condensed interim consolidated financial statements reflect the cumulative operating results of the predecessor, as related to the mineral properties that were transferred to the Company from 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 February 28, 2015, the Company had interests in properties in Alaska and Nevada, U.S.A.
	The business of mining and exploration involves a high degree of risk and there can be no assurance that current exploration programs will result in profitable mining operations. The Company has no source of revenue, and has significant cash requirements to meet its administrative overhead and maintain its mineral property interests. The recoverability of amounts shown for exploration and evaluation assets is dependent on several factors. These include the discovery of economically recoverable reserves, the ability of the Company to obtain the necessary financing to complete the development of these properties, and future profitable production or proceeds from disposition of exploration and evaluation assets. The carrying value of the Company’s exploration and evaluation assets does not reflect current or future values.
	These condensed interim 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 which is at least, but not limited to, 12 months from February 28, 2015. Management is aware, in making its assessment, of material uncertainties relating to events or conditions that raise significant doubt upon the Company’s ability to continue as a going concern, as explained in the following paragraph.
	The Company has sustained losses from operations, and has an ongoing requirement for capital investment to explore its exploration and evaluation assets. Based on its current plans, budgeted expenditures, and cash requirements, the Company does not have sufficient cash to finance its current plans for at least 12 months from February 28, 2015. The Company expects that it will need to raise substantial additional capital to accomplish its business plan over the next several years. The Company expects to seek additional financing through equity financing. There can be no assurance as to the availability or terms upon which such financing might be available.
	These condensed interim consolidated financial statements do not include any adjustments to the amounts and classification of assets and liabilities that might be necessary should the Company be unable to continue in business.

SIGNIFICANT_ACCOUNTING_POLICIE

SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
	Feb. 28, 2015
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	3	SIGNIFICANT ACCOUNTING POLICIES
	Basis of presentation
	These unaudited condensed consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X under the Securities Exchange Act of 1934, as amended. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for annual financial statements. These unaudited condensed interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements for the year ended May 31, 2014 as filed in our Annual Report on Form S-1/A. In the opinion of the Company’s management these financial statements reflect all adjustments, consisting of normal recurring adjustments, necessary to present fairly the Company’s financial position at February 28, 2015 and the results of its operations for the nine months then ended. Operating results for the nine months ended February 28, 2015 are not necessarily indicative of the results that may be expected for the year ending May 31, 2015. The 2014 year-end balance sheet data was derived from the audited financial statements but does not include all disclosures required by U.S. GAAP.
	The preparation of financial statements in conformity with US GAAP requires management to make judgments, estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the period. These judgments, estimates and assumptions are continuously evaluated and are based on management’s experience and knowledge of the relevant facts and circumstances. While management believes the estimates to be reasonable, actual results could differ from those estimates and could impact future results of operations and cash flows.
	Basis of Consolidation
	These unaudited condensed interim 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) and SoN Land and Water LLC (“SoN”) (a Nevada limited liability company). All intercompany transactions and balances were eliminated upon consolidation.
	Earnings (loss) per share
	Basic loss per share is calculated using the weighted average number of common shares outstanding during the period. 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 period. 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 period ended February 28, 2015, 7,371,334 outstanding stock options (2014 – 6,175,234) were not included in the calculation of diluted earnings (loss) per share as their inclusion was anti-dilutive.

MARKETABLE_SECURITIES

MARKETABLE SECURITIES	9 Months Ended
	Feb. 28, 2015
Investments, Debt and Equity Securities [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	4	MARKETABLE SECURITIES
	As at February 28, 2015, the Company held 200,000 (May 31, 2014 – 200,000) common shares of WestMountain Gold with a fair value of $102,525 (May 31, 2014 - $147,451). The Company classified these shares as held-for-trading. Subsequent to February 28, 2015, the Company sold 53,160 shares of WestMountain for an average of USD  0.2384 for gross proceeds of USD 12,674.

PROPERTY_AND_EQUIPMENT

PROPERTY AND EQUIPMENT	9 Months Ended
	Feb. 28, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment Disclosure [Text Block]	5	PROPERTY AND EQUIPMENT
			Computer Equipment		Vehicles		Tent		Total
	Cost
	Balance, May 31, 2014		$	38,733	$	73,962	$	54,210	$	166,905
	Additions			13,822		-		-		13,822
	Currency translation adjustments			6,664		11,331		8,305		26,300
	Balance, February 28, 2015		$	59,219	$	85,293	$	62,515	$	207,027
	Depreciation
	Balance, May 31, 2014		$	21,978	$	42,058	$	5,422	$	69,458
	Depreciation for the period			5,522		7,514		7,661		20,697
	Currency translation adjustments			3,293		7,206		1,609		12,108
	Balance at February 28, 2015		$	30,793	$	56,778	$	14,692	$	102,263
	Carrying amounts
	Balance at May 31, 2014		$	16,755	$	31,904	$	48,788	$	97,447
	Balance at February 28, 2015		$	28,426	$	28,515	$	47,823	$	104,764

RECLAMATION_BOND

RECLAMATION BOND	9 Months Ended
	Feb. 28, 2015
RECLAMATION BOND [Abstract]
RECLAMATION BOND [Text Block]		6	RECLAMATION BOND
	As at February 28, 2015, the Company has not commenced development of any mineral properties and accordingly a reasonable estimate of the timing of the cash flows cannot be made. The Company has posted non-interest bearing bonds totalling $Nil (USD nil) (May 31, 2014 - $522,332 (USD 481,767)) with the Nevada Division of Minerals in the State of Nevada as security for these obligations. Fair value could not be reasonably determined and accordingly the bonds were recorded at historical cost, adjusted for current exchange rates. During the period ended February 28, 2015, the Company entered into a corporate surety bond with a bonding company and as a result, the previously posted non-interest bearing bonds were refunded by the Nevada Division of Minerals in the State of Nevada.

MINERAL_PROPERTIES

MINERAL PROPERTIES	9 Months Ended
	Feb. 28, 2015
Mineral Industries Disclosures [Abstract]
Mineral Industries Disclosures [Text Block]	7	MINERAL PROPERTIES
	The Company had the following activity related to capitalized acquisition costs:
			Chisna		North Bullfrog		LMS		Total
			(note 7(a))		(notes 7(d))		(note 7(c))
	Balance, May 31, 2014		$	550,255	$	3,168,810	$	326,050	$	4,045,115
	Acquisition costs			-		-		-		-
	Currency translation adjustments			84,300		478,802		49,951		613,053
	Balance, February 28, 2015		$	634,555	$	3,647,612	$	376,001	$	4,658,168
	The following table presents costs incurred for exploration and evaluation activities for the nine months ended February 28, 2015:
			West Pogo		Chisna		North Bullfrog		LMS		Total
			(note 7(b))		(note 7(a))		(notes 7(d))		(note 7(c))
	Exploration costs:
	Aircraft services		$	-	$	11,202	$	-	$	-	$	11,202
	Assay			-		12,924		826,943		-		839,867
	Drilling			-		-		1,282,967		-		1,282,967
	Equipment rental			-		1,466		224,400		-		225,866
	Field costs			2,027		7,096		256,653		284		266,060
	Geological/ Geophysical			4,164		1,811		777,024		29,170		812,169
	Land maintenance & tenure			11,023		77,972		227,869		27,331		344,195
	Permits			-		-		-		-		-
	Professional fees			-		-		-		-		-
	Studies			-		-		487,020		-		487,020
	Transportation			-		-		-		878		878
	Travel			-		5,133		163,492		1,423		170,048
	Total expenditures for the period		$	17,214	$	117,604	$	4,246,368	$	59,086	$	4,440,272
	The following table presents costs incurred for exploration and evaluation activities for the nine months ended February 28, 2014:
			West Pogo		Chisna		North Bullfrog		LMS		Terra		Gerfaut		Total
			(note 7(b))		(note 7(a))		(notes 7(d))		(note 7(c))
	Exploration costs:
	Aircraft services		$	-	$	-	$	-	$	-	$	1,778	$	-	$	1,778
	Assay			-		-		1,463,540		-		-		-		1,463,540
	Drilling			-		-		2,248,376		-		-		-		2,248,376
	Equipment rental			-		-		242,926		-		840		-		243,766
	Field costs			-		11,483		186,624		294		8		2,817		201,226
	Geological/			-		12,287		845,670		3,753		32,073		31		893,814
	Geophysical
	Land maintenance			3,373		110,492		230,666		20,701		95,735		-		460,967
	& tenure
	Permits			-		-		5,047		-		-		-		5,047
	Professional fees			-		-		-		-		7,341		-		7,341
	Studies			-		-		632,856		-		-		-		632,856
	Transportation			-		1,526		-		1,125		-		-		2,651
	Travel			-		7,072		169,337		-		4,442		-		180,851
				3,373		142,860		6,025,042		25,873		142,217		2,848		6,342,213
	Cost recovery			-		-		-		-		-95,957		-		-95,957
	Total expenditures for the period		$	3,373	$	142,860	$	6,025,042	$	25,873	$	46,260	$	2,848	$	6,246,256
		a)	Chisna Property, Alaska
	The Chisna property is located in the eastern Alaska Range, Alaska, and is comprised of unpatented mineral claims owned 100% by the Company and fee simple lands leased from Ahtna Incorporated.
	On November 2, 2009, ITH and Talon Gold Alaska, Inc. (ITH’s wholly-owned Alaskan subsidiary) (“Talon Gold”) entered into an agreement (as amended) with Ocean Park Ventures Corp. (“OPV”). Pursuant to the agreement, an Alaskan subsidiary of OPV (“Subco”) and Raven Gold formed a joint venture (the “OPV/Raven JV”) for the purpose of exploring and developing the Chisna property.
	On November 7, 2012, OPV withdrew from the joint venture and thereby returned 100% of the Chisna Project to the Company.
	On March 24, 2010, Raven Gold entered into a Mineral Exploration Agreement with Option to Lease with Ahtna Incorporated (“Ahtna”), an Alaska Native Regional Corporation, concerning approximately 26,516 hectares of fee simple lands in the Athell Area of Alaska surrounding or adjacent to some of the blocks of mineral claims owned by Raven Gold (the “Ahtna Agreement”).
	The key terms of the Ahtna Agreement include the following:
		·	exclusive right to explore, and the option to enter into a mining lease to develop and mine, the subject lands for a six-year period
		·	annual option payments of USD 1.00 – USD 1.25 per acre
		·	minimum exploration expenditures of USD 4.00 – USD 8.00 per acre, provided that if the agreement is not terminated at the end of any option year, the exploration expenditures for the next year become a firm commitment
		·	at the end of the third year, Raven Gold will release at least 50% of the original lands subject to the agreement
		·	preferential contracting, hiring and training practice for Ahtna shareholders or designees
		·	scholarship contributions to the Ahtna Heritage Foundation (USD 10,000/year, subject to increase for inflation)
		·	all surface work subject to Ahtna archaeological and cultural clearance
	Upon Raven Gold having expended an aggregate of USD 1,000,000 (including 2,500 feet of core drilling) and having completed a feasibility study over some or all of the land subject to the exploration agreement within the six year term of the Ahtna Agreement, Raven Gold has the option to enter into a mining lease. The key terms of the mining lease include:
		·	exclusive mining rights for an initial term of ten years and so long thereafter as commercial production continues
		·	minimum exploration expenditures of USD 4.00 – USD 9.00 per acre subject to the lease until commercial production is achieved, escalating over time
		·	advance minimum royalty payments of USD 6.00 – USD 12.00 per acre escalating over time (50% deductible from production royalties)
		·	NSR production royalties for gold and silver scaled from 2.5% (gold price USD 550 per ounce or less) to 14% (gold price USD 1,900 per ounce or higher). 2.5% on base metals and 3% on all minerals other than gold, silver or base metals
	·	Ahtna is also entitled to receive an amount by which 20% of the net profits realized by Raven Gold from its mining operations on Ahtna minerals (10% in the case of non-Ahtna minerals) in any year exceed the aggregate royalties paid by Raven Gold to Ahtna in that year
	·	Ahtna has the right to acquire a working interest in the lands subject to the lease, which is to be greater than or equal to 10% but not more than 15%, upon Raven Gold having made a production decision, and in consideration, Ahtna will be required to fund ongoing operations after such exercise in an amount equal to 200% of Ahtna’s percentage share of the pre-production expenditures incurred by Raven Gold (not including advance minimum royalty payments to Ahtna).
During the period ended February 28, 2015, the Company gave notification and terminated the Ahtna lease.
	b)	West Pogo Property, Alaska
The West Pogo property is located approximately 50 kilometres north of Delta Junction, Alaska, and consists of unpatented mineral claims owned 100% by the Company.
During the year ended May 31, 2014, the Company wrote off the West Pogo property, as there had been a delay in exploration work on the property for an extended period of time.
	c)	LMS Property, Alaska
The LMS property consists of unpatented mineral claims owned 100% by the Company.
	d)	North Bullfrog Project, Nevada
The Company’s North Bullfrog project consists of certain leased patented lode mining claims and an additional 758 federal unpatented mining claims owned 100% by the Company.
	(i)	Interests acquired from Redstar Gold Corp.
On October 9, 2009, a US subsidiary of ITH at the time (Corvus Nevada) completed the acquisition of all of the interests of Redstar Gold Corp. (“Redstar”) and Redstar Gold U.S.A. Inc. (“Redstar US”) in the North Bullfrog project, which consisted of the following leases:
	-1	Pursuant to a mining lease and option to purchase agreement made effective October 27, 2008 between Redstar and an arm’s length limited liability company, Redstar has leased (and has the option to purchase) 12 patented mining claims referred to as the “Connection” property. The ten-year, renewable mining lease requires advance minimum royalty payments (recoupable from production royalties, but not applicable to the purchase price if the option to purchase is exercised) of USD 10,800 (paid) on signing and annual payments for the first three anniversaries of USD 10,800 (paid) and USD 16,200 for every year thereafter (paid to September 30, 2014). Redstar has an option to purchase the property (subject to the NSR royalty below) for USD 1,000,000 at any time during the life of the lease. Production is subject to a 4% NSR royalty, which may be purchased by the lessee for USD 1,250,000 per 1% (USD 5,000,000 for the entire royalty).
	-2	Pursuant to a mining lease made and entered into as of May 8, 2006 between Redstar and two arm’s length individuals, Redstar has leased 3 patented mining claims which form part of the North Bullfrog project holdings. The lease is for an initial term of 10 years, and for so long thereafter as mining activities continue on the claims or contiguous claims held by the lessee. The lessee is required to pay advance minimum royalty payments (recoupable from production royalties) of USD 4,000 on execution, USD 3,500 on each of May 8, 2007, 2008 and 2009 (paid), USD 4,500 on May 8, 2010 and each anniversary thereafter, adjusted for inflation (paid to May 8, 2014). The lessor is entitled to receive a 2% NSR royalty on all production, which may be purchased by the lessee for USD 1,000,000 per 1% (USD 2,000,000 for the entire royalty).
	-3	Pursuant to a mining lease made and entered into as of May 8, 2006 between Redstar and an arm’s length private Nevada corporation, Redstar has leased 2 patented mining claims which form part of the North Bullfrog project holdings. The lease is for an initial term of 10 years, and for so long thereafter as mining activities continue on the claims or contiguous claims held by the lessee. The lessee is required to pay advance minimum royalty payments (recoupable from production royalties) of USD 2,000 on execution, USD 2,000 on each of May 8, 2007, 2008 and 2009 (paid), USD 3,000 on May 8, 2010 and each anniversary thereafter, adjusted for inflation (paid to May 8, 2014). The lessor is entitled to receive a 3% NSR royalty on all production, which may be purchased by the lessee for USD 850,000 per 1% (USD 2,550,000 for the entire royalty).
	-4	Pursuant to a mining lease made and entered into as of May 16, 2006 between Redstar and an arm’s length individual, Redstar has leased 12 patented mineral claims which form part of the North Bullfrog project holdings. The lease is for an initial term of 10 years, and for so long thereafter as mining activities continue on the claims or contiguous claims held by the lessee. The lessee is required to pay advance minimum royalty payments (recoupable from production royalties) of USD 20,500 on execution and USD 20,000 on each anniversary thereafter (paid to May 16, 2014). The lessor is entitled to receive a 4% NSR royalty on all production, which may be purchased by the lessee for USD 1,000,000 per 1% (USD 4,000,000 for the entire royalty).
	-5	Pursuant to a mining lease made and entered into as of May 22, 2006 between Redstar and two arm’s length individuals, Redstar has leased 3 patented mineral claims which form part of the North Bullfrog project holdings. The lease is for an initial term of 10 years, and for so long thereafter as mining activities continue on the claims or contiguous claims held by the lessee. The lessee is required to pay advance minimum royalty payments (recoupable from production royalties) of USD 8,000 on execution, USD 4,800 on each of May 22, 2007, 2008 and 2009 (paid), USD 7,200 on May 22, 2010 and each anniversary thereafter, adjusted for inflation (paid to May 22, 2014). The lessor is entitled to receive a 2% NSR royalty on all production, which may be purchased by the lessee for USD 1,000,000 per 1% (USD 2,000,000 for the entire royalty).
	-6	Pursuant to a mining lease made and entered into as of June 16, 2006 between Redstar and an arm’s length individual, Redstar has leased one patented mineral claims which form part of the North Bullfrog project holdings. The lease is for an initial term of 10 years, and for so long thereafter as mining activities continue on the claims or contiguous claims held by the lessee. The lessee is required to pay advance minimum royalty payments (recoupable from production royalties) of USD 2,000 on execution, USD 2,000 on each of June 16, 2007, 2008 and 2009 (paid), USD 3,000 on June 16, 2010 and each anniversary thereafter, adjusted for inflation (paid to June 16, 2014). The lessor is entitled to receive a 2% NSR royalty on all production, which may be purchased by the lessee for USD 1,000,000 per 1% (USD 2,000,000 for the entire royalty).
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. The Company acquired all of the shares of Corvus Nevada on August 26, 2010 upon the completion of the Arrangement.
	(ii)	Interests acquired directly by Corvus Nevada
	-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).
	¤	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 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, and USD 10,000 paid on November 17, 2014 and 50,000 common shares of ITH, purchased for $18,662 in the market by the Company, were delivered on November 7, 2014).
	¤	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 in April 2015) 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 ½ common shares of the Company for each of the ITH shares due per the original agreement.
	¤	Work Commitments: USD 100,000 per year for the first three years (incurred), USD 200,000 per year for the years 4 – 6 (incurred) and USD 300,000 for the years 7 – 10. 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 mining lease and option to purchase made effective March 1, 2011 between Corvus Nevada and an arm’s length individual, Corvus Nevada has leased, and has the option to purchase, 2 patented mineral claims which form part of the North Bullfrog project holdings. The lease is for an initial term of 10 years, subject to extension for an additional 10 years (provided advance minimum royalties are timely paid), and for so long thereafter as mining activities continue on the claims. The lessee is required to pay advance minimum royalty payments (recoupable from production royalties, but not applicable to the purchase price if the option to purchase is exercised) of USD 20,000 on execution (paid), USD 25,000 on each of March 1, 2012 (paid), 2013 (paid) and 2014 (paid), USD 30,000 on March 1, 2015 (paid) and each anniversary thereafter, adjusted for inflation. The lessor is entitled to receive a 2% NSR royalty on all production. The lessee may purchase the royalty for USD 1,000,000 per 1%. If the lessee purchases the entire royalty (USD 2,000,000) the lessee will also acquire all interest of the lessor in the subject property.
	-3	Pursuant to a purchase agreement made effective March 28, 2013, Corvus Nevada has agreed to purchase the surface rights of five patented mining claims owned by two arm’s length individuals for USD 160,000 payable on closing (March 28, 2013). The Terms include payment by Corvus Nevada of a fee of USD 0.02 per ton of overburden to be stored on the property, subject to payment of a minimum of 12 million short tons. The minimum tonnage fee (USD 240,000) bears interest at 4.77% per annum from closing and is evidenced by a promissory note due on the sooner of the commencing of use of the property for waste materials storage or December 31, 2015. As a result, the Company recorded $406,240 (USD 400,000) in acquisition costs with $157,408 paid in cash and the remaining $248,832 (USD 240,000) in promissory note payable (note 8) during the year ended May 31, 2013.
	-4	In December 2013, SoN completed the purchase of a parcel of land approximately 30 km north of the North Bullfrog project which carries with it 1,600 acre feet of irrigation water rights. The cost of the land and associated water rights was cash payment of $1,100,118 (USD 1,034,626).
	-5	On March 30, 2015, Lunar Landing, LLC signed a lease agreement with Corvus Nevada to lease private property containing the three patented Sunflower claims to Corvus Nevada, which are adjacent to the Yellowrose claims leased in 2014. The term of the lease is 3 years with provision to extend the lease for an additional 7 years, and an advance minimum royalty payment of USD 5,000 per year with USD 5,000 paid upon singing. The lease includes a 4% NSR royalty on production, with an option to purchase the royalty for USD 500,000 per 1% or USD 2,000,000 for the entire 4% royalty. The lease also includes the option to purchase the property for USD 300,000.
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 assurance that such title will ultimately be secured.
Environmental Expenditures
The operations of the Company may in the future be affected from time to time in varying degrees by changes in environmental regulations, including those for future removal and site restoration costs. Both the likelihood of new regulations and their overall effect upon the Company vary greatly and are not predictable. The Company’s policy is to meet or, if possible, surpass standards set by relevant legislation by application of technically proven and economically feasible measures.
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 determined as of February 28, 2015, the disturbances to earth are minimal, therefore has not recorded a provision for environmental expenditures.

PROMISSORY_NOTE_PAYABLE

PROMISSORY NOTE PAYABLE	9 Months Ended
	Feb. 28, 2015
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]		8	PROMISSORY NOTE PAYABLE
	As at March 28, 2013 the Company issued a promissory note payable of USD 240,000 (May 31, 2014 - $260,208 (USD 240,000)) bearing interest at 4.77% per annum due on the sooner of the commencing of use of the property for waste materials storage as stated in note 7(d)(ii)(3) or December 31, 2015. At February 28, 2015, the promissory note payable was translated to $300,072.

SHARE_CAPITAL

SHARE CAPITAL	9 Months Ended
	Feb. 28, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	9	SHARE CAPITAL
	Authorized
	Unlimited common shares without par value.
	Share issuances
	During the period ended February 28, 2015:
		a)	On August 27, 2014, the Company closed a non-brokered public equity financing and issued 5,150,000 common shares at a price of $1.20 per share for gross proceeds of $6,180,000. In connection with the financing, the Company paid $190,167 in share issuance costs. The offering was registered under the United States Securities Act of 1933, as amended, pursuant to a Form S-1 registration statement filed with the United States Securities and Exchange Commission and qualified in certain Canadian provinces pursuant to a prospectus filed with the relevant Canadian regulatory authorities.
		b)	On February 27, 2015, the Company closed a non-brokered private placement equity financing and issued 4,500,000 common shares at a price of $1.00 per share for gross proceeds of $4,500,000.
		c)	An aggregate of 18,900 shares were issued an exercise of 18,900 stock options for gross proceeds of $9,450.
	Stock options
	Stock options awarded to employees and non-employees by the Company are measured and recognized in the condensed interim consolidated statement of comprehensive loss over the vesting period.
	The Company has adopted an incentive stock option plan (the “2010 Plan”). The essential elements of the 2010 Plan provide that the aggregate number of common shares of the Company’s share capital that may be made issuable pursuant to options granted under the 2010 Plan (together with any other shares which may be issued under other share compensation plans of the Company) may not exceed 10% of the number of issued shares of the Company at the time of the granting of the options. Options granted under the 2010 Plan will have a maximum term of ten years. The exercise price of options granted under the 2010 Plan will not be less than the greater of the market price of the common shares (as defined by the Toronto Stock Exchange (“TSX”), currently defined as the 5 day volume weighted average price for the 5 trading days immediately preceding the date of grant) or the closing market price of the Company’s common shares for the trading day immediately preceding the date of grant), or such other price as may be agreed to by the Company and accepted by the TSX. Options granted under the 2010 Plan vest immediately, unless otherwise determined by the directors at the date of grant.
	A summary of the status of the stock option plan as of February 28, 2015 and May 31, 2014, and changes during the periods are presented below:
			February 28, 2015						May 31, 2014
			Number of Options			Weighted Average Exercise			Number of Options		Weighted Average Exercise
						Price					Price
	Balance, beginning of the period			6,175,234		$	0.84			4,075,234	$	0.88
	Granted			1,525,000			1.36			2,470,000		0.76
	Exercised			-18,900			-0.5			-70,000		-0.69
	Forfeited			-			-			-300,000		-0.81
	Expired			-310,000			-1			-		-
	Balance, end of the period			7,371,334		$	0.94			6,175,234	$	0.84
	The weighted average remaining contractual life of options outstanding at February 28, 2015 was 3.10 years (May 31, 2014 - 3.46 years).
	Stock options outstanding are as follows:
			February 28, 2015								May 31, 2014
	Expiry Date		Exercise			Number			Exercisable		Exercise		Number of		Exercisable
			Price			of			at Period-		Price		Options		at Year-
						Options			End						End
	27-Sep-14		$	-			-			-	$	1.08		150,000		150,000
	29-Jul-16		$	0.5			464,434			464,434	$	0.5		483,334		483,334
	29-Oct-16		$	0.96			100,000			50,000	$	-		-		-
	17-Nov-16		$	0.67			210,000			210,000	$	0.67		210,000		210,000
	23-Jan-17		$	1.1			50,000			12,500	$	-		-		-
	29-May-17		$	0.92			300,000			300,000	$	0.92		300,000		300,000
	19-Sep-17		$	0.96			2,461,900			2,461,900	$	0.96		2,561,900		1,628,370
	16-Aug-18		$	0.76			2,420,000			1,611,720	$	0.76		2,470,000		822,510
	8-Sep-19		$	1.4			1,365,000			454,545	$	-		-		-
							7,371,334			5,565,099				6,175,234		3,594,214
	Stock-based compensation
	The Company uses the fair value method for determining stock-based compensation for all options granted during the periods. The fair value of options granted was $1,093,938 (2014 - $1,449,654), determined using the Black-Scholes option pricing model based on the following weighted average assumptions:
	For the nine months ended February 28,		2015			2014
	Risk-free interest rate			1.53	%		1.96	%
	Expected life of options			4.70 years			5 years
	Annualized volatility			68.85	%		100	%
	Dividend yield			0	%		0	%
	Exercise price		$	1.36		$	0.76
	Fair value per share		$	0.72		$	0.59
	Annualized volatility was determined by reference to historic volatility of similar entities following a comparable period in their lives.
	Stock-based compensation has been allocated as follows:
	For the nine months ended February 28,		2015			2014
	Consulting		$	414,066		$	340,812
	Exploration expenditures – Geological/geophysical			30,765			47,237
	Investor relations			164,611			281,390
	Professional fees			39,458			50,986
	Wages and benefits			496,573			641,088
			$	1,145,473		$	1,361,513

RELATED_PARTY_TRANSACTIONS

RELATED PARTY TRANSACTIONS	9 Months Ended
	Feb. 28, 2015
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]		10	RELATED PARTY TRANSACTIONS
	During the period ended February 28, 2015, the Company entered into the following transactions with related parties:
	Management compensation
	For the nine months ended February 28,		2015		2014
	Consulting fees to CFO		$	79,000	$	79,000
	Wages and benefits to CEO, President and COO			700,783		598,915
	Directors fees (included in consulting fees)			89,000		77,274
	Fees to Vice President of Corporate Communications (included in investor relations)			142,500		135,000
	Professional fees to Vice President			25,680		61,000
	Stock-based compensation to related parties			974,335		1,164,368
			$	2,011,298	$	2,115,557
	As at February 28, 2015, included in accounts payable and accrued liabilities was $26,255 (May 31, 2014 – $27,462) in expenses owing to companies related to officers of the Company.
	These amounts were unsecured, non-interest bearing and had no fixed terms or terms of repayment. Accordingly, fair value could not be readily determined.
	The Company entered into a retainer agreement dated June 1, 2011 with Lawrence W. Talbot Law Corporation (“LWTLC”), a company with officers in common, pursuant to which LWTLC agrees to provide legal services to the Company. Pursuant to the retainer agreement, the Company  agreed to pay LWTLC a minimum annual retainer of $72,000 (plus applicable taxes and disbursements). The retainer agreement may be terminated by LWTLC on reasonable notice, and by the Company on one year’s notice (or payment of one year’s retainer in lieu of notice). An officer of the Company is a director and shareholder of LWTLC. LWTLC ceased to be a related party on October 9, 2014. During the period ended February 28, 2015, the Company terminated the agreement and paid $73,830 in lieu of notice.
	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 times to three times) of the sum of the annual base salary then payable to the officer, the aggregate amount of bonus(es) (if any) paid to the officer within the calendar year immediate preceding the Effective Date of Termination, and an amount equal to the vacation pay which would otherwise be payable for the one year period next following the Effective Date of Termination.

GEOGRAPHIC_SEGMENTED_INFORMATI

GEOGRAPHIC SEGMENTED INFORMATION	9 Months Ended
	Feb. 28, 2015
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	11	GEOGRAPHIC SEGMENTED INFORMATION
	The Company operates in one industry segment, the mineral resources industry, and in two geographical segments, Canada and the United States. All current exploration activities are conducted in the United States. The significant asset categories identifiable with these geographical areas are as follows:
			Canada		United States		Total
	28-Feb-15
	Capitalized acquisition costs		$	-	$	4,658,168	$	4,658,168
	Property and equipment		$	3,144	$	101,620	$	104,764
	31-May-14
	Capitalized acquisition costs		$	-	$	4,045,115	$	4,045,115
	Property and equipment		$	4,057	$	93,390	$	97,447
	For the nine months ended February 28,		2015		2014
	Net loss for the period – Canada		$	-2,416,587	$	-2,455,132
	Net loss for the period – United States			-5,784,708		-5,551,124
	Net loss for the period		$	-8,201,295	$	-8,006,256

SUPPLEMENTAL_CASH_FLOW_INFORMA

SUPPLEMENTAL CASH FLOW INFORMATION	9 Months Ended
	Feb. 28, 2015
Supplemental Cash Flow Information [Abstract]
Cash Flow, Supplemental Disclosures [Text Block]		12	SUPPLEMENTAL CASH FLOW INFORMATION
	For the nine months ended February 28,		2015		2014
	Supplemental cash flow information
	Interest paid (received)		$	-	$	-
	Income taxes paid		$	-	$	-

SUBSIDIARIES

SUBSIDIARIES	9 Months Ended
	Feb. 28, 2015
Subsidiaries [Abstract]
Subsidiaries [Text Block]	13	SUBSIDIARIES
	Significant subsidiaries for the nine months ended February 28, 2015 and 2014 are:
			Country of Incorporation	Principal	The Company’s effective interest for	The Company’s effective interest for
				Activity	2015	2014
	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%

SIGNIFICANT_ACCOUNTING_POLICIE1

SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
	Feb. 28, 2015
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of presentation
	These unaudited condensed consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X under the Securities Exchange Act of 1934, as amended. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for annual financial statements. These unaudited condensed interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements for the year ended May 31, 2014 as filed in our Annual Report on Form S-1/A. In the opinion of the Company’s management these financial statements reflect all adjustments, consisting of normal recurring adjustments, necessary to present fairly the Company’s financial position at February 28, 2015 and the results of its operations for the nine months then ended. Operating results for the nine months ended February 28, 2015 are not necessarily indicative of the results that may be expected for the year ending May 31, 2015. The 2014 year-end balance sheet data was derived from the audited financial statements but does not include all disclosures required by U.S. GAAP.
	The preparation of financial statements in conformity with US GAAP requires management to make judgments, estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the period. These judgments, estimates and assumptions are continuously evaluated and are based on management’s experience and knowledge of the relevant facts and circumstances. While management believes the estimates to be reasonable, actual results could differ from those estimates and could impact future results of operations and cash flows.
Consolidation, Policy [Policy Text Block]	Basis of Consolidation
	These unaudited condensed interim 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) and SoN Land and Water LLC (“SoN”) (a Nevada limited liability company). All intercompany transactions and balances were eliminated upon consolidation.
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 period. 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 period. 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 period ended February 28, 2015, 7,371,334 outstanding stock options (2014 – 6,175,234) were not included in the calculation of diluted earnings (loss) per share as their inclusion was anti-dilutive.

PROPERTY_AND_EQUIPMENT_Tables

PROPERTY AND EQUIPMENT (Tables)	9 Months Ended
	Feb. 28, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]		Computer Equipment		Vehicles		Tent		Total
	Cost
	Balance, May 31, 2014	$	38,733	$	73,962	$	54,210	$	166,905
	Additions		13,822		-		-		13,822
	Currency translation adjustments		6,664		11,331		8,305		26,300
	Balance, February 28, 2015	$	59,219	$	85,293	$	62,515	$	207,027
	Depreciation
	Balance, May 31, 2014	$	21,978	$	42,058	$	5,422	$	69,458
	Depreciation for the period		5,522		7,514		7,661		20,697
	Currency translation adjustments		3,293		7,206		1,609		12,108
	Balance at February 28, 2015	$	30,793	$	56,778	$	14,692	$	102,263
	Carrying amounts
	Balance at May 31, 2014	$	16,755	$	31,904	$	48,788	$	97,447
	Balance at February 28, 2015	$	28,426	$	28,515	$	47,823	$	104,764

MINERAL_PROPERTIES_Tables

MINERAL PROPERTIES (Tables)	9 Months Ended
	Feb. 28, 2015
Mineral Industries Disclosures [Abstract]
Capitalized Costs Relating to Acquisition Activities Disclosure [Table Text Block]	The Company had the following activity related to capitalized acquisition costs:
		Chisna		North Bullfrog		LMS		Total
		(note 7(a))		(notes 7(d))		(note 7(c))
	Balance, May 31, 2014	$	550,255	$	3,168,810	$	326,050	$	4,045,115
	Acquisition costs		-		-		-		-
	Currency translation adjustments		84,300		478,802		49,951		613,053
	Balance, February 28, 2015	$	634,555	$	3,647,612	$	376,001	$	4,658,168
Cost Incurred in Acquisition Exploration and Evaluation Activities Disclosure [Table Text Block]	The following table presents costs incurred for exploration and evaluation activities for the nine months ended February 28, 2015:
		West Pogo		Chisna		North Bullfrog		LMS		Total
		(note 7(b))		(note 7(a))		(notes 7(d))		(note 7(c))
	Exploration costs:
	Aircraft services	$	-	$	11,202	$	-	$	-	$	11,202
	Assay		-		12,924		826,943		-		839,867
	Drilling		-		-		1,282,967		-		1,282,967
	Equipment rental		-		1,466		224,400		-		225,866
	Field costs		2,027		7,096		256,653		284		266,060
	Geological/ Geophysical		4,164		1,811		777,024		29,170		812,169
	Land maintenance & tenure		11,023		77,972		227,869		27,331		344,195
	Permits		-		-		-		-		-
	Professional fees		-		-		-		-		-
	Studies		-		-		487,020		-		487,020
	Transportation		-		-		-		878		878
	Travel		-		5,133		163,492		1,423		170,048
	Total expenditures for the period	$	17,214	$	117,604	$	4,246,368	$	59,086	$	4,440,272
	The following table presents costs incurred for exploration and evaluation activities for the nine months ended February 28, 2014:
		West Pogo		Chisna		North Bullfrog		LMS		Terra		Gerfaut		Total
		(note 7(b))		(note 7(a))		(notes 7(d))		(note 7(c))
	Exploration costs:
	Aircraft services	$	-	$	-	$	-	$	-	$	1,778	$	-	$	1,778
	Assay		-		-		1,463,540		-		-		-		1,463,540
	Drilling		-		-		2,248,376		-		-		-		2,248,376
	Equipment rental		-		-		242,926		-		840		-		243,766
	Field costs		-		11,483		186,624		294		8		2,817		201,226
	Geological/		-		12,287		845,670		3,753		32,073		31		893,814
	Geophysical
	Land maintenance		3,373		110,492		230,666		20,701		95,735		-		460,967
	& tenure
	Permits		-		-		5,047		-		-		-		5,047
	Professional fees		-		-		-		-		7,341		-		7,341
	Studies		-		-		632,856		-		-		-		632,856
	Transportation		-		1,526		-		1,125		-		-		2,651
	Travel		-		7,072		169,337		-		4,442		-		180,851
			3,373		142,860		6,025,042		25,873		142,217		2,848		6,342,213
	Cost recovery		-		-		-		-		-95,957		-		-95,957
	Total expenditures for the period	$	3,373	$	142,860	$	6,025,042	$	25,873	$	46,260	$	2,848	$	6,246,256

SHARE_CAPITAL_Tables

SHARE CAPITAL (Tables)	9 Months Ended
	Feb. 28, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	A summary of the status of the stock option plan as of February 28, 2015 and May 31, 2014, and changes during the periods are presented below:
		February 28, 2015						May 31, 2014
		Number of Options			Weighted Average Exercise			Number of Options		Weighted Average Exercise
					Price					Price
	Balance, beginning of the period		6,175,234		$	0.84			4,075,234	$	0.88
	Granted		1,525,000			1.36			2,470,000		0.76
	Exercised		-18,900			-0.5			-70,000		-0.69
	Forfeited		-			-			-300,000		-0.81
	Expired		-310,000			-1			-		-
	Balance, end of the period		7,371,334		$	0.94			6,175,234	$	0.84
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	Stock options outstanding are as follows:
		February 28, 2015								May 31, 2014
	Expiry Date	Exercise			Number			Exercisable		Exercise		Number of		Exercisable
		Price			of			at Period-		Price		Options		at Year-
					Options			End						End
	27-Sep-14	$	-			-			-	$	1.08		150,000		150,000
	29-Jul-16	$	0.5			464,434			464,434	$	0.5		483,334		483,334
	29-Oct-16	$	0.96			100,000			50,000	$	-		-		-
	17-Nov-16	$	0.67			210,000			210,000	$	0.67		210,000		210,000
	23-Jan-17	$	1.1			50,000			12,500	$	-		-		-
	29-May-17	$	0.92			300,000			300,000	$	0.92		300,000		300,000
	19-Sep-17	$	0.96			2,461,900			2,461,900	$	0.96		2,561,900		1,628,370
	16-Aug-18	$	0.76			2,420,000			1,611,720	$	0.76		2,470,000		822,510
	8-Sep-19	$	1.4			1,365,000			454,545	$	-		-		-
						7,371,334			5,565,099				6,175,234		3,594,214
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	The fair value of options granted was $1,093,938 (2014 - $1,449,654), determined using the Black-Scholes option pricing model based on the following weighted average assumptions:
	For the nine months ended February 28,	2015			2014
	Risk-free interest rate		1.53	%		1.96	%
	Expected life of options		4.70 years			5 years
	Annualized volatility		68.85	%		100	%
	Dividend yield		0	%		0	%
	Exercise price	$	1.36		$	0.76
	Fair value per share	$	0.72		$	0.59
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]	Stock-based compensation has been allocated as follows:
	For the nine months ended February 28,	2015			2014
	Consulting	$	414,066		$	340,812
	Exploration expenditures – Geological/geophysical		30,765			47,237
	Investor relations		164,611			281,390
	Professional fees		39,458			50,986
	Wages and benefits		496,573			641,088
		$	1,145,473		$	1,361,513

RELATED_PARTY_TRANSACTIONS_Tab

RELATED PARTY TRANSACTIONS (Tables)	9 Months Ended
	Feb. 28, 2015
Related Party Transactions [Abstract]
Schedule of Related Party Transactions [Table Text Block]	During the period ended February 28, 2015, the Company entered into the following transactions with related parties:
	Management compensation
	For the nine months ended February 28,	2015		2014
	Consulting fees to CFO	$	79,000	$	79,000
	Wages and benefits to CEO, President and COO		700,783		598,915
	Directors fees (included in consulting fees)		89,000		77,274
	Fees to Vice President of Corporate Communications (included in investor relations)		142,500		135,000
	Professional fees to Vice President		25,680		61,000
	Stock-based compensation to related parties		974,335		1,164,368
		$	2,011,298	$	2,115,557

GEOGRAPHIC_SEGMENTED_INFORMATI1

GEOGRAPHIC SEGMENTED INFORMATION (Tables)	9 Months Ended
	Feb. 28, 2015
Segment Reporting [Abstract]
Long-lived Assets by Geographic Areas [Table Text Block]	The Company operates in one industry segment, the mineral resources industry, and in two geographical segments, Canada and the United States. All current exploration activities are conducted in the United States. The significant asset categories identifiable with these geographical areas are as follows:
		Canada		United States		Total
	28-Feb-15
	Capitalized acquisition costs	$	-	$	4,658,168	$	4,658,168
	Property and equipment	$	3,144	$	101,620	$	104,764
	31-May-14
	Capitalized acquisition costs	$	-	$	4,045,115	$	4,045,115
	Property and equipment	$	4,057	$	93,390	$	97,447
	For the nine months ended February 28,	2015		2014
	Net loss for the period – Canada	$	-2,416,587	$	-2,455,132
	Net loss for the period – United States		-5,784,708		-5,551,124
	Net loss for the period	$	-8,201,295	$	-8,006,256

SUPPLEMENTAL_CASH_FLOW_INFORMA1

SUPPLEMENTAL CASH FLOW INFORMATION (Tables)	9 Months Ended
	Feb. 28, 2015
Supplemental Cash Flow Information [Abstract]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	For the nine months ended February 28,	2015		2014
	Supplemental cash flow information
	Interest paid (received)	$	-	$	-
	Income taxes paid	$	-	$	-

SUBSIDIARIES_Tables

SUBSIDIARIES (Tables)	9 Months Ended
	Feb. 28, 2015
Subsidiaries [Abstract]
Schedule Of Significant Subsidiaries [Table Text Block]	Significant subsidiaries for the nine months ended February 28, 2015 and 2014 are:
		Country of Incorporation	Principal	The Company’s effective interest for	The Company’s effective interest for
			Activity	2015	2014
	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%

SIGNIFICANT_ACCOUNTING_POLICIE2

SIGNIFICANT ACCOUNTING POLICIES (Details Textual)	9 Months Ended		12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	31-May-13	31-May-12	31-May-11
SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	7,371,334	6,175,234	25,000	25,000	10,000

MARKETABLE_SECURITIES_Details_

MARKETABLE SECURITIES (Details Textual)	3 Months Ended
	Feb. 28, 2015	Feb. 28, 2015	Feb. 27, 2015	31-May-14
	USD ($)	CAD	CAD	CAD
Marketable Securities [Abstract]
Shares of Unrelated Third Party, Held-for-trading	200,000			200,000
Marketable Securities, Current		102,525		147,451
Sale of Stock, Number of Shares Issued in Transaction	53,160
Sale of Stock, Price Per Share	$0.24		1
Proceeds from Sale and Maturity of Marketable Securities	$12,674

PROPERTY_AND_EQUIPMENT_Details

PROPERTY AND EQUIPMENT (Details) (CAD)	3 Months Ended		9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014
Property, Plant and Equipment [Line Items]
Cost, Balance, May 31, 2014			166,905
Additions			13,822
Currency translation adjustments			26,300
Cost, Balance, February 28, 2015	207,027		207,027
Depreciation, Balance, May 31, 2014			69,458
Depreciation for the period	7,293	5,134	20,697	14,976
Currency translation adjustments			12,108
Depreciation, Balance at February 28, 2015	102,263		102,263
Carrying amounts, Balance at May 31, 2014			97,447
Carrying amounts, Balance at February 28, 2015	104,764		104,764
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Cost, Balance, May 31, 2014			38,733
Additions			13,822
Currency translation adjustments			6,664
Cost, Balance, February 28, 2015	59,219		59,219
Depreciation, Balance, May 31, 2014			21,978
Depreciation for the period			5,522
Currency translation adjustments			3,293
Depreciation, Balance at February 28, 2015	30,793		30,793
Carrying amounts, Balance at May 31, 2014			16,755
Carrying amounts, Balance at February 28, 2015	28,426		28,426
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Cost, Balance, May 31, 2014			73,962
Additions			0
Currency translation adjustments			11,331
Cost, Balance, February 28, 2015	85,293		85,293
Depreciation, Balance, May 31, 2014			42,058
Depreciation for the period			7,514
Currency translation adjustments			7,206
Depreciation, Balance at February 28, 2015	56,778		56,778
Carrying amounts, Balance at May 31, 2014			31,904
Carrying amounts, Balance at February 28, 2015	28,515		28,515
Tent [Member]
Property, Plant and Equipment [Line Items]
Cost, Balance, May 31, 2014			54,210
Additions			0
Currency translation adjustments			8,305
Cost, Balance, February 28, 2015	62,515		62,515
Depreciation, Balance, May 31, 2014			5,422
Depreciation for the period			7,661
Currency translation adjustments			1,609
Depreciation, Balance at February 28, 2015	14,692		14,692
Carrying amounts, Balance at May 31, 2014			48,788
Carrying amounts, Balance at February 28, 2015	47,823		47,823

RECLAMATION_BOND_Details_Textu

RECLAMATION BOND (Details Textual)	Feb. 28, 2015	Feb. 28, 2015	31-May-14	31-May-14
	USD ($)	CAD	USD ($)	CAD
RECLAMATION BOND [Line Items]
Reclamation Bond	$0	0	$481,767	522,332

MINERAL_PROPERTIES_Details

MINERAL PROPERTIES (Details) (CAD)	9 Months Ended
	Feb. 28, 2015
Balance, May 31, 2014	4,045,115
Acquisition costs	0
Currency translation adjustments	613,053
Balance, February 28, 2015	4,658,168
Chisna [Member]
Balance, May 31, 2014	550,255
Acquisition costs	0
Currency translation adjustments	84,300
Balance, February 28, 2015	634,555
North Bullfrog [Member]
Balance, May 31, 2014	3,168,810
Acquisition costs	0
Currency translation adjustments	478,802
Balance, February 28, 2015	3,647,612
LMS Property [Member]
Balance, May 31, 2014	326,050
Acquisition costs	0
Currency translation adjustments	49,951
Balance, February 28, 2015	376,001

MINERAL_PROPERTIES_Details_1

MINERAL PROPERTIES (Details 1) (CAD)	9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014
Costs Incurred for Exploration and Evaluation Activities, Gross	4,440,272	6,342,213
Cost recovery		-95,957
Costs Incurred for Exploration and Evaluation Activities, Net		6,246,256
West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	17,214	3,373
Cost recovery		0
Costs Incurred for Exploration and Evaluation Activities, Net		3,373
Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	117,604	142,860
Cost recovery		0
Costs Incurred for Exploration and Evaluation Activities, Net		142,860
North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	4,246,368	6,025,042
Cost recovery		0
Costs Incurred for Exploration and Evaluation Activities, Net		6,025,042
LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	59,086	25,873
Cost recovery		0
Costs Incurred for Exploration and Evaluation Activities, Net		25,873
Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		142,217
Cost recovery		-95,957
Costs Incurred for Exploration and Evaluation Activities, Net		46,260
Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		2,848
Cost recovery		0
Costs Incurred for Exploration and Evaluation Activities, Net		2,848
Aircraft Services [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	11,202	1,778
Aircraft Services [Member] | West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Aircraft Services [Member] | Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	11,202	0
Aircraft Services [Member] | North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Aircraft Services [Member] | LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Aircraft Services [Member] | Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		1,778
Aircraft Services [Member] | Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Assay [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	839,867	1,463,540
Assay [Member] | West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Assay [Member] | Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	12,924	0
Assay [Member] | North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	826,943	1,463,540
Assay [Member] | LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Assay [Member] | Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Assay [Member] | Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Drilling [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	1,282,967	2,248,376
Drilling [Member] | West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Drilling [Member] | Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Drilling [Member] | North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	1,282,967	2,248,376
Drilling [Member] | LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Drilling [Member] | Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Drilling [Member] | Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Equipment rental [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	225,866	243,766
Equipment rental [Member] | West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Equipment rental [Member] | Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	1,466	0
Equipment rental [Member] | North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	224,400	242,926
Equipment rental [Member] | LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Equipment rental [Member] | Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		840
Equipment rental [Member] | Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Field Costs [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	266,060	201,226
Field Costs [Member] | West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	2,027	0
Field Costs [Member] | Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	7,096	11,483
Field Costs [Member] | North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	256,653	186,624
Field Costs [Member] | LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	284	294
Field Costs [Member] | Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		8
Field Costs [Member] | Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		2,817
Geological Geophysical [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	812,169	893,814
Geological Geophysical [Member] | West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	4,164	0
Geological Geophysical [Member] | Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	1,811	12,287
Geological Geophysical [Member] | North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	777,024	845,670
Geological Geophysical [Member] | LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	29,170	3,753
Geological Geophysical [Member] | Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		32,073
Geological Geophysical [Member] | Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		31
Land Maintenance Tenure [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	344,195	460,967
Land Maintenance Tenure [Member] | West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	11,023	3,373
Land Maintenance Tenure [Member] | Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	77,972	110,492
Land Maintenance Tenure [Member] | North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	227,869	230,666
Land Maintenance Tenure [Member] | LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	27,331	20,701
Land Maintenance Tenure [Member] | Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		95,735
Land Maintenance Tenure [Member] | Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Permits [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	5,047
Permits [Member] | West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Permits [Member] | Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Permits [Member] | North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	5,047
Permits [Member] | LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Permits [Member] | Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Permits [Member] | Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Professional Fees [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	7,341
Professional Fees [Member] | West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Professional Fees [Member] | Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Professional Fees [Member] | North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Professional Fees [Member] | LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Professional Fees [Member] | Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		7,341
Professional Fees [Member] | Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Studies [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	487,020	632,856
Studies [Member] | West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Studies [Member] | Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Studies [Member] | North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	487,020	632,856
Studies [Member] | LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Studies [Member] | Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Studies [Member] | Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Transportation [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	878	2,651
Transportation [Member] | West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Transportation [Member] | Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	1,526
Transportation [Member] | North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Transportation [Member] | LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	878	1,125
Transportation [Member] | Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Transportation [Member] | Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0
Travel [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	170,048	180,851
Travel [Member] | West Pogo [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	0	0
Travel [Member] | Chisna [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	5,133	7,072
Travel [Member] | North Bullfrog [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	163,492	169,337
Travel [Member] | LMS Property [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross	1,423	0
Travel [Member] | Terra [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		4,442
Travel [Member] | Gerfaut [Member]
Costs Incurred for Exploration and Evaluation Activities, Gross		0

MINERAL_PROPERTIES_Details_Tex

MINERAL PROPERTIES (Details Texual)

9 Months Ended

12 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

9 Months Ended

9 Months Ended

1 Months Ended

1 Months Ended

1 Months Ended

9 Months Ended

0 Months Ended

1 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

1 Months Ended

1 Months Ended

Feb. 28, 2015

Feb. 28, 2014

31-May-13

31-May-12

31-May-11

Oct. 27, 2008

31-May-14

Mar. 28, 2013

Mar. 01, 2011

Dec. 02, 2010

31-May-13

31-May-13

Nov. 17, 2014

Nov. 07, 2014

Nov. 25, 2013

Nov. 13, 2013

Oct. 31, 2012

Oct. 25, 2012

Nov. 10, 2010

Mar. 30, 2015

Feb. 28, 2015

Feb. 28, 2015

Feb. 28, 2015

Feb. 28, 2015

Nov. 10, 2010

Dec. 02, 2010

Feb. 28, 2015

Feb. 28, 2015

Feb. 28, 2015

8-May-06

Oct. 27, 2008

Mar. 24, 2010

Mar. 24, 2010

Mar. 24, 2010

Mar. 24, 2010

Nov. 07, 2014

Nov. 25, 2013

Oct. 25, 2012

Dec. 01, 2010

Dec. 02, 2010

Feb. 28, 2015

Feb. 28, 2015

Jun. 16, 2006

16-May-06

22-May-06

8-May-06

Feb. 28, 2015

8-May-06

Feb. 28, 2015

Feb. 28, 2015

Feb. 28, 2015

Mar. 24, 2010

Mar. 24, 2010

Feb. 28, 2015

Mar. 24, 2010

Oct. 27, 2008

Mar. 01, 2011

8-May-06

Jun. 16, 2006

22-May-06

16-May-06

8-May-06

Oct. 27, 2008

Mar. 01, 2011

Jun. 16, 2006

22-May-06

16-May-06

8-May-06

8-May-06

CAD

Subsequent Event [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Nevada Corporation [Member]

Redstar Gold Corp [Member]

Ahtna Agreement [Member]

Ahtna Agreement [Member]

Ahtna Agreement [Member]

Ahtna Agreement [Member]

International Tower Hill Mines [Member]

International Tower Hill Mines [Member]

International Tower Hill Mines [Member]

International Tower Hill Mines [Member]

International Tower Hill Mines [Member]

International Tower Hill Mines [Member]

Chisna [Member]

North Bullfrog [Member]

North Bullfrog [Member]

North Bullfrog [Member]

North Bullfrog [Member]

North Bullfrog [Member]

North Bullfrog [Member]

West Pogo [Member]

LMS Property [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Minimum [Member]

NSR [Member]

NSR [Member]

NSR [Member]

NSR [Member]

NSR [Member]

NSR [Member]

NSR [Member]

Royalty Agreements [Member]

Royalty Agreements [Member]

Royalty Agreements [Member]

Royalty Agreements [Member]

Royalty Agreements [Member]

Royalty Agreements [Member]

Royalty Agreements [Member]

USD ($)

USD ($)

CAD

USD ($)

USD ($)

CAD

USD ($)

USD ($)

CAD

USD ($)

Subsequent Event [Member]

Royalty Of Two Percentage [Member]

Royalty Of Three Percentage [Member]

Royalty Of Four Percentage [Member]

First Through Fourth Year Lease [Member]

Fifth Year Lease [Member]

Fifth Through Ninth Year Lease [Member]

Fourth Through Sixth Year Lease [Member]

Seventh Through Tenth Year Lease [Member]

First Through Third Year Lease [Member]

USD ($)

Raven Gold [Member]

Raven Gold [Member]

Raven Gold [Member]

Raven Gold [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

Corvus Nevada [Member]

CAD

USD ($)

USD ($)

USD ($)

USD ($)

CAD

Nevada Corporation [Member]

CAD

Corvus Nevada [Member]

Ahtna Agreement [Member]

Chisna [Member]

Corvus Nevada [Member]

Ahtna Agreement [Member]

Corvus Nevada [Member]

Nevada Corporation [Member]

North Bullfrog [Member]

North Bullfrog [Member]

North Bullfrog [Member]

North Bullfrog [Member]

USD ($)

Corvus Nevada [Member]

North Bullfrog [Member]

North Bullfrog [Member]

North Bullfrog [Member]

North Bullfrog [Member]

North Bullfrog [Member]

lb

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Base Metal [Member]

Other Minerals [Member]

Non Ahtna Minerals [Member]

USD ($)

USD ($)

Royalty Of Three Percentage [Member]

Raven Gold [Member]

Ahtna Agreement [Member]

Royalty Of Three Percentage [Member]

Raven Gold [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Nevada Corporation [Member]

ha

USD ($)

USD ($)

Raven Gold [Member]

USD ($)

USD ($)

USD ($)

sqft

USD ($)

Unpatented Mineral Claims

100.00%

100.00%

100.00%

100.00%

Land Subject to Ground Leases

26,516

Annual Option Payment Price Per Acre

$1.25

$1

Exploration Expenditure Price Per Acre

9

8

4

Land Release Percentage

50.00%

Scholarship Contributions to Foundation

10,000

Exploration Expense, Mining

1,000,000

Process Of Drilling

2,500

Royalties Paid In Advance

12

6

Royalty Other Than Production

50.00%

Production Royalty Per Ounce

400

500

500

1,900

401

550

Royalty Percentage

1.00%

1.00%

2.00%

3.00%

4.00%

1.00%

2.50%

3.00%

1.00%

1.00%

1.00%

1.00%

14.00%

2.50%

4.00%

2.00%

3.00%

2.00%

2.00%

4.00%

2.00%

Profit Sharing Percentage

20.00%

10.00%

Working Interest Rate Acquired

200.00%

15.00%

10.00%

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

20,000

2,000

8,000

20,500

4,000

2,000

Capital Leases, Future Minimum Payments Due, Next Twelve Months

25,000

Capital Leases, Future Minimum Payments Due in Three Years

10,800

2,000

4,800

20,000

3,500

2,000

Capital Leases, Future Minimum Payments Due Thereafter

16,200

30,000

3,000

7,200

4,500

3,000

Purchase Obligation

1,000,000

1,000,000

1,000,000

1,000,000

1,000,000

850,000

1,250,000

Royalty Expense

5,000

2,000,000

4,000,000

2,000,000

2,000,000

2,550,000

5,000,000

2,000,000

Capital Lease Obligations

10,000

18,662

35,871

10,000

10,000

126,924

108,750

5,000

10,000

5,000

1,000,000

Lease Payments Common Shares Issued

46,250

50,000

50,000

50,000

50,000

20,000

50,000

25,000

Lease Payments Additional Common Shares Issued

20,000

Other Commitment

200,000

300,000

100,000

Purchase Agreement Payable

160,000

Cash

157,408

Notes Payable

240,000

248,832

Debt Instrument, Interest Rate, Effective Percentage

4.77%

Acquisition Costs, Period Cost

0

400,000

406,240

0

0

0

Price Per Ton of Overburden to be Stored on the Property

0.02

Minimum Storage Capacity of the Property

12,000,000

Lease Term

3 years

Additional Lease Term

7 years

Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount

7,371,334

6,175,234

25,000

25,000

10,000

25,000

Artist Advances and Royalty Guarantees, Commitments

The lease includes a 4% NSR royalty on production, with an option to purchase the royalty for USD 500,000 per 1% or USD 2,000,000 for the entire 4% royalty. The lease also includes the option to purchase the property for USD 300,000.

Advance Royalties

$5,000

PROMISSORY_NOTE_PAYABLE_Detail

PROMISSORY NOTE PAYABLE (Details Textual)	Feb. 28, 2015	31-May-14	Feb. 28, 2015	Feb. 28, 2015	31-May-14	31-May-14	Mar. 28, 2013
	CAD	CAD	Promissory Note Payable [Member]	Promissory Note Payable [Member]	Promissory Note Payable [Member]	Promissory Note Payable [Member]	Promissory Note Payable [Member]
				CAD	USD ($)	CAD	USD ($)
Debt Instrument [Line Items]
Notes Payable, Noncurrent	0	260,208		300,072	$240,000	260,208	$240,000
Debt Instrument, Interest Rate, Stated Percentage					4.77%	4.77%
Debt Instrument, Maturity Date			31-Dec-15	31-Dec-15

SHARE_CAPITAL_Details

SHARE CAPITAL (Details) (CAD)	9 Months Ended	12 Months Ended
	Feb. 28, 2015	31-May-14
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Balance, beginning of the period	6,175,234	4,075,234
Number of Options, Granted	1,525,000	2,470,000
Number of Options, Exercised	-18,900	-70,000
Number of Options, Forfeited	0	-300,000
Number of Options, Expired	-310,000	0
Number of Options, Balnce, end of the period	7,371,334	6,175,234
Weighted Average Exercise Price, Balance, beginning of the period	0.84	0.88
Weighted Average Exercise Price, Granted	1.36	0.76
Weighted Average Exercise Price, Exercised	-0.5	-0.69
Weighted Average Exercise Price, Forfeited	0	-0.81
Weighted Average Exercise Price, Expired	-1	0
Weighted Average Exercise Price, Balance, end of the period	0.94	0.84

SHARE_CAPITAL_Details_1

SHARE CAPITAL (Details 1) (CAD)	Feb. 28, 2015	31-May-14	31-May-13
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	0.94	0.84	0.88
Number of Options	7,371,334	6,175,234	4,075,234
Exercisable at Period- End	5,565,099	3,594,214
September 27, 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	0	1.08
Number of Options	0	150,000
Exercisable at Period- End	0	150,000
July 29, 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	0.5	0.5
Number of Options	464,434	483,334
Exercisable at Period- End	464,434	483,334
October 29, 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	0.96	0
Number of Options	100,000	0
Exercisable at Period- End	50,000	0
November 17, 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	0.67	0.67
Number of Options	210,000	210,000
Exercisable at Period- End	210,000	210,000
January 23,2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	1.1	0
Number of Options	50,000	0
Exercisable at Period- End	12,500	0
May 29, 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	0.92	0.92
Number of Options	300,000	300,000
Exercisable at Period- End	300,000	300,000
September 19,2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	0.96	0.96
Number of Options	2,461,900	2,561,900
Exercisable at Period- End	2,461,900	1,628,370
August 16, 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	0.76	0.76
Number of Options	2,420,000	2,470,000
Exercisable at Period- End	1,611,720	822,510
September 8, 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	1.4	0
Number of Options	1,365,000	0
Exercisable at Period- End	454,545	0

SHARE_CAPITAL_Details_2

SHARE CAPITAL (Details 2) (CAD)	9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.53%	1.96%
Expected life of options	4 years 8 months 12 days	5 years
Annualized volatility	68.85%	100.00%
Dividend yield	0.00%	0.00%
Exercise price	1.36	0.76
Fair value per share	0.72	0.59

SHARE_CAPITAL_Details_3

SHARE CAPITAL (Details 3) (CAD)	9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	1,145,473	1,361,513
Consulting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	414,066	340,812
Exploration expenditures - Geological/geophysical [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	30,765	47,237
Investor relations [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	164,611	281,390
Professional Fees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	39,458	50,986
Wages and benefits [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	496,573	641,088

SHARE_CAPITAL_Details_Textual

SHARE CAPITAL (Details Textual)	1 Months Ended	9 Months Ended		12 Months Ended		3 Months Ended	1 Months Ended
	Feb. 27, 2015	Feb. 28, 2015	Feb. 28, 2014	31-May-14	Feb. 28, 2015	Feb. 28, 2015	Aug. 27, 2014
	CAD	CAD	CAD		USD ($)	Employee Stock Option [Member]	Private Placement [Member]
						CAD	CAD
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock Issued During Period, Shares, New Issues	4,500,000						5,150,000
Sale of Stock, Price Per Share	1				$0.24		1.2
Proceeds from Issuance of Private Placement	4,500,000						6,180,000
Payments of Stock Issuance Costs		190,167	40,312				190,167
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term			3 years 1 month 6 days	3 years 5 months 16 days
Share Based Compensation Arrangement by Share Based Payment Award Options Grant in Period, Fair Value		1,093,938	1,449,654
Stock Issued During Period, Shares, Other						18,900
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		18,900		70,000		18,900
Stock Issued During Period, Value, Stock Options Exercised		9,450				9,450

RELATED_PARTY_TRANSACTIONS_Det

RELATED PARTY TRANSACTIONS (Details) (CAD)	3 Months Ended		9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014
Related Party Transaction [Line Items]
Consulting fees	235,627	196,134	609,566	517,836
Professional fees	83,574	125,422	411,616	329,344
Related Party Transaction [Member]
Related Party Transaction [Line Items]
Stock-based compensation to related parties			974,335	1,164,368
Management compensation			2,011,298	2,115,557
Chief Financial Officer [Member] | Related Party Transaction [Member]
Related Party Transaction [Line Items]
Consulting fees			79,000	79,000
Chief Executive Officer [Member] | Related Party Transaction [Member]
Related Party Transaction [Line Items]
Wages and benefits			700,783	598,915
Director [Member] | Related Party Transaction [Member]
Related Party Transaction [Line Items]
Directors fees (included in consulting fees)			89,000	77,274
Vice President [Member] | Related Party Transaction [Member]
Related Party Transaction [Line Items]
Fees to Vice President of Corporate Communications (included in investor relations)			142,500	135,000
Professional fees			25,680	61,000

RELATED_PARTY_TRANSACTIONS_Det1

RELATED PARTY TRANSACTIONS (Details Textual) (CAD)	9 Months Ended
	Feb. 28, 2015	31-May-14	Jun. 01, 2011
Related Party Transaction [Line Items]
Accounts Payable and Accrued Liabilities	26,255	27,462
Legal Fees	73,830
Due to Other Related Parties, Classified, Current			72,000

GEOGRAPHIC_SEGMENTED_INFORMATI2

GEOGRAPHIC SEGMENTED INFORMATION (Details) (CAD)	Feb. 28, 2015	31-May-14
Segment Reporting Information [Line Items]
Capitalized acquisition costs	4,658,168	4,045,115
Property and equipment	104,764	97,447
CANADA
Segment Reporting Information [Line Items]
Capitalized acquisition costs	0	0
Property and equipment	3,144	4,057
UNITED STATES
Segment Reporting Information [Line Items]
Capitalized acquisition costs	4,658,168	4,045,115
Property and equipment	101,620	93,390

GEOGRAPHIC_SEGMENTED_INFORMATI3

GEOGRAPHIC SEGMENTED INFORMATION (Details 1) (CAD)	3 Months Ended		9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014
Segment Reporting Information [Line Items]
Net loss for the period	-2,148,324	-1,087,665	-8,201,295	-8,006,256
CANADA
Segment Reporting Information [Line Items]
Net loss for the period			-2,416,587	-2,455,132
UNITED STATES
Segment Reporting Information [Line Items]
Net loss for the period			-5,784,708	-5,551,124

SUPPLEMENTAL_CASH_FLOW_INFORMA2

SUPPLEMENTAL CASH FLOW INFORMATION (Details) (CAD)	9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014
Supplemental cash flow information
Interest paid (received)	0	0
Income taxes paid	0	0

SUBSIDIARIES_Details

SUBSIDIARIES (Details)	9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014
Corvus Gold (USA) Inc [Member]
Subsidiary or Equity Method Investee [Line Items]
Country of Incorporation	USA
Principal Activity	Holding company
Effective interest	100.00%	100.00%
Raven Gold Alaska Inc [Member]
Subsidiary or Equity Method Investee [Line Items]
Country of Incorporation	USA
Principal Activity	Exploration company
Effective interest	100.00%	100.00%
Corvus Gold Nevada Inc [Member]
Subsidiary or Equity Method Investee [Line Items]
Country of Incorporation	USA
Principal Activity	Exploration company
Effective interest	100.00%	100.00%
SoN Land & Water LLC [Member]
Subsidiary or Equity Method Investee [Line Items]
Country of Incorporation	USA
Principal Activity	Exploration company
Effective interest	100.00%	100.00%