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Note 24 - Share-based Payments - Deferred Shares (Details) - Deferred stock units of Grant One [member] | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Statement Line Items [Line Items] |  |  |
Deferred shares outstanding at January 1st | 19,260,000 | 19,056,000 | 17,490,000
New deferred shares during the period | 794,000 | 7,329,000 | 2,692,000
Deferred shares granted during the period | (2,874,000) | (6,118,000) | (804,000)
Deferred shares forfeited during the period | (880,000) | (1,007,000) | (322,000)
Deferred shares outstanding at ended year | 16,300,000 | 19,260,000 | 19,056,000

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