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Schedule of NovaGold Arrangement Stock Options Outstanding (Details) - May. 31, 2015 - NovaGold Arrangement Options [Member] - $ / shares	Total
Number of outstanding and exercisable options	546,771
Weighted average years to expiry	1 year 2 months 8 days
Weighted average exercise price	$ 5.10
NovaGold Arrangement Range 1 [Member]
Exercise price lower range limit	2.88
Exercise price upper range limit	$ 3.99
Number of outstanding and exercisable options	66,664
Weighted average years to expiry	1 year 4 months 24 days
Weighted average exercise price	$ 3.08
NovaGold Arrangement Range 2 [Member]
Exercise price lower range limit	4.00
Exercise price upper range limit	$ 5.99
Number of outstanding and exercisable options	295,071
Weighted average years to expiry	1 year 5 months 8 days
Weighted average exercise price	$ 4.84
NovaGold Arrangement Range 3 [Member]
Exercise price lower range limit	6.00
Exercise price upper range limit	$ 7.99
Number of outstanding and exercisable options	185,036
Weighted average years to expiry	8 months 19 days
Weighted average exercise price	$ 6.24

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (g)



-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (g)



-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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