Note 8 - Financial Instruments - Change in Fair Value of Derivative Instruments (Details) (Parentheticals)	Jun. 30, 2019	Jun. 30, 2018
European-focused senior convertible unsecured 6.5% convertible bonds, conversion feature [member]
Statement Line Items [Line Items]
Borrowings, interest rate		6.50%
Unrealized foreign exchange on European-focused senior convertible unsecured 6.5% convertible bonds [member]
Statement Line Items [Line Items]
Borrowings, interest rate	6.50%	6.50%

The interest rate on borrowings. [Refer: Borrowings]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 7
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_7&doctype=Standard
-URIDate 2017-03-09

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Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant