Note 23 - Share-based Compensation Plans - Deferred Share Grants Available for Grant (Details) - Deferred share grants [member]	12 Months Ended
Mar. 31, 2018 shares	Mar. 31, 2018	Mar. 31, 2017 shares	Mar. 31, 2017
Statement Line Items [Line Items]
Balance, beginning of year	117,936	117,936	147,430
Less: Granted		(40,531)		(29,494)
Balance, end of year	77,405	77,405	117,936	117,936

The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_b&doctype=Standard
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 45
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45&doctype=Standard
-URIDate 2017-03-09

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