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Note 15 - Share Capital - Common Shares Outstanding (Details) - shares |  | 12 Months Ended
--- | --- | ---
Jun. 10, 2019 | Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2019
Balance, beginning of year (in shares) |  | 84,156,316 | 76,865,000 | 76,773,000
Stock options and share units exercised (in shares) |  | 338,000 | 95,000 | 46,000
Issuance of common shares (in shares) | 6,900,000 |  | 6,900,000 |
Acquisitions (Note 3) (in shares) |  |  | 296,000 | 46,000
Balance, end of year (in shares) |  | 84,494,658 | 84,156,316 | 76,865,000

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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 + Details
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