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Note 14 - Share Capital - Common Shares Outstanding (Details) - shares	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Balance, beginning of year (in shares)	75,761,184	75,480,000	63,661,000
Stock options and share units exercised (in shares)	114,000	281,000	478,000
Acquisitions (Note 3) (in shares)			416,000
Balance, end of year (in shares)	75,874,684	75,761,184	75,480,000
Public Offering [Member]
Issuance of common shares (in shares)			10,925,000

X

- Definition

Represents the number of shares issued from the exercise of stock options and share units.

+ References

No definition available.

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- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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- Definition

Number of new stock issued during the period.

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