Note 23 - Equity-settled Share-based Expense - Facilitation and Advance Dividend Loan Modification (Details) - Faciliation and advanced dividend loans [member] $ in Thousands	12 Months Ended
Dec. 31, 2017 USD ($)
Statement Line Items [Line Items]
Risk free interest rate	USD swap curve
Group market capitalisation at grant date ($’000)	$ 68,436
Bottom of range [member]
Statement Line Items [Line Items]
Blanket Mine dividend yield	23.70%
Top of range [member]
Statement Line Items [Line Items]
Blanket Mine dividend yield	89.88%

Information about how the fair value was determined for other equity instruments granted (ie other than share options) if it was not measured on the basis of an observable market price.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 47
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_b_i&doctype=Standard
-URIDate 2017-03-09

Name:	ifrs-full_InformationAboutHowFairWasDeterminedIfNotOnBasisOfObservableMarketOtherEquityInstrumentsGranted
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration