Condensed Interim Consolidated Statement of Changes in Equity (Unaudited) - 9 months ended Feb. 28, 2019 - CAD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at May. 31, 2018	104,255,175
Balance at May. 31, 2018	$ 83,606,486	$ 13,030,715	$ 1,123,410	$ (90,269,926)	$ 7,490,685
Net loss for the period				(7,995,922)	(7,995,922)
Private placement (in shares)	2,530,770
Private placement	$ 6,580,002				$ 6,580,002
Exercise of stock options (in shares)	4,036,900				4,036,900
Exercise of stock options	$ 3,453,924				$ 3,453,924
Share issued for capitalized acquisition costs (in shares)	25,000
Share issued for capitalized acquisition costs	$ 59,500				59,500	[1]
Exchange difference on translating foreign operations			105,541		105,541
Share issuance costs	(31,059)				(31,059)
Reclassification of contributed surplus on exercise of stock options	$ 2,736,339	(2,736,339)
Stock-based compensation		962,148			962,148
Balance (in shares) at Feb. 28, 2019	110,847,845
Balance at Feb. 28, 2019	$ 96,405,192	$ 11,256,524	$ 1,228,951	$ (98,265,848)	$ 10,624,819

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