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Note 24 - Share-based Payments - Deferred Shares (Details) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Deferred stock units of Grant One [member] |  |  |
Statement Line Items [Line Items] |  |  |
Shares outstanding at January 1st | 16,300,000 | 19,260,000 | 19,056,000
New shares during the period | 426,000 | 794,000 | 7,329,000
Shares granted during the period | (3,429,000) | (2,874,000) | (6,118,000)
Shares forfeited during the period | (989,000) | (880,000) | (1,007,000)
Shares outstanding at ended year | 12,308,000 | 16,300,000 | 19,260,000
Restricted shares [member] |  |  |
Statement Line Items [Line Items] |  |  |
Shares outstanding at January 1st |  |  |
New shares during the period | 13,055,000 |  |
Shares granted during the period | (296,000) |  |
Shares forfeited during the period | (103,000) |  |
Shares outstanding at ended year | 12,656,000 |  |

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