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Note 6 - Blanket Mine Indigenization Transaction (Details Textual) - USD ($) $ in Thousands |  |  |  | 2 Months Ended | 5 Months Ended | 7 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 05, 2018 | Jun. 23, 2017 | Feb. 20, 2012 | Apr. 30, 2013 | Feb. 28, 2013 | Sep. 30, 2012 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2018 | Jun. 22, 2017 | Dec. 31, 2016
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interests held by non-controlling interests |  |  | 51.00% |  |  |  | 51.00% |  |  |  |  |  |  |  |
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity attributable to owners of parent |  |  | $ 30,090 |  |  |  |  |  |  |  |  |  |  |  |
Non-controlling interest, non-refundable donation |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |
Dividend loans, Percentage of dividend as payment of interest |  | 80.00% | 80.00% |  |  |  |  |  |  |  |  |  |  |  |
Proportion of dividends declared accruing unconditionally |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 7.25% |  |  |  |  |  |  |  |  |  |  |  |  |
Total borrowings |  |  |  |  |  |  | $ 2,471 |  | $ 5,960 |  | $ 1,486 |  |  |  | $ 2,987
Percentage of net assets recognised as NCI |  |  | 16.20% |  |  |  | 16.20% |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |
Expense from equity-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets |  | $ 806 |  |  |  |  |  |  | $ 14 | [1] | $ 835 | [1] |  |  |
Cash advances on dividend loans |  |  |  | $ 1,000 | $ 1,000 | $ 2,000 |  |  |  |  |  |  |  |  |
Femiro [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest acquired | 15.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of instruments or interests issued or issuable for cancellation of loan | 727,266 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued or issuable, price per share | 7.15 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Femiro [Member] | Facilitation loan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total borrowings |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,467 |  |
NIEEF [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interests held by non-controlling interests |  |  | 16.00% |  |  |  | 16.00% |  |  |  |  |  |  |  |
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity attributable to owners of parent |  |  | $ 11,740 |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest sold |  |  | 16.00% |  |  |  |  |  |  |  |  |  |  |  |
Non-controlling interests recognised, dividends declared accruing unconditionally |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Non-controlling interests recognised, portion recognised to the extent net asset value exceeds faciliation loans |  |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |
Fremiro [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interests held by non-controlling interests |  |  | 15.00% |  |  |  | 15.00% |  |  |  |  |  |  |  |
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity attributable to owners of parent |  |  | $ 11,010 |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest sold |  |  | 15.00% |  |  |  |  |  |  |  |  |  |  |  |
Non-controlling interests recognised, dividends declared accruing unconditionally |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Non-controlling interests recognised, portion recognised to the extent net asset value exceeds faciliation loans |  |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |
BETS [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interests held by non-controlling interests |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity attributable to owners of parent |  |  | $ 7,340 |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest sold |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |
Community Trust [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interests held by non-controlling interests |  |  | 10.00% |  |  |  | 10.00% |  |  |  |  |  |  |  |
Proportion of ownership interest sold |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |
Non-controlling interests recognised, dividends declared accruing unconditionally |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Non-controlling interests recognised, portion recognised to the extent net asset value exceeds faciliation loans |  |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |
Non-controlling interests recognised, dividends declared accruing unconditionally employee participation |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Blanket Mine (1983) (Private) Limited [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary | 64.00% |  |  |  |  |  | 49.00% | [2] | 49.00% | [2] |  |  |  |  |
[1] | The Group initially applied IFRS 16 on January 1, 2019, using the modified retrospective approach. Under this approach, comparative information is not restated. There was no cumulative effect of initially applying IFRS 16 to recognise in retained earnings at the date of initial application.
[2] | Refer to Note 6, for the effective shareholding. NCI has a 16.2% interest in cash flows of Blanket only.

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