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Note 15 - Property, Plant, and Equipment (Tables)
 12 Months Ended
Dec. 31, 2017
Statement Line Items [Line Items]  
Disclosure of detailed information about property, plant and equipment [text block]
Cost   Land and buildings     Mine development, infrastructure and other     Exploration and Evaluation assets     Plant and equipment     Fixtures and fittings     Motor vehicles     Total  
Balance at January 1, 2016    
7,989
      
31,158
      
6,224
      
20,626
      
1,277
      
2,069
      
69,343
  
Additions
**
    
-
      
*17,545
      
739
      
572
      
73
      
230
      
19,159
  
Disposals and scrappings    
-
      
-
      
-
      
-
      
(502
 )    
(55
 )    
(557
 )
Reallocations between asset classes    
361
      
(3,699
 )    
-
      
3,338
      
-
      
-
      
-
  
Foreign exchange movement    
17
      
74
      
4
      
-
      
28
      
11
      
134
  
Balance at December 31, 2016    
8,367
      
45,078
      
6,967
      
24,536
      
876
      
2,255
      
88,079
  
Balance at January 1, 2017    
8,367
      
45,078
      
6,967
      
24,536
      
876
      
2,255
      
88,079
  
Additions
**
    
-
      
*17,464
      
-
      
3,377
      
36
      
72
      
20,949
  
Impairments    
-
      
-
      
-
      
(12
 )    
-
      
-
      
(12
 )
Disposals and scrappings    
-
      
-
      
-
      
-
      
-
      
(2
 )    
(2
 )
Reallocations between asset classes    
1,051
      
(1,051
 )    
-
      
(20
 )    
20
      
-
      
-
  
Foreign exchange movement    
16
      
7
      
-
      
-
      
11
      
4
      
38
  
Balance at December 31, 2017    
9,434
      
61,498
      
6,967
      
27,881
      
943
      
2,329
      
109,052
  
    Land and buildings     Mine development, infrastructure and other     Exploration and Evaluation assets     Plant and equipment     Fixtures and fittings     Motor vehicles     Total  
Accumulated depreciation and Impairment losses                                                        
Balance at January 1, 2016    
2,321
      
3,781
      
-
      
11,524
      
996
      
1,503
      
20,125
  
Disposals and scrappings    
-
      
-
      
-
      
-
      
(502
 )    
(8
 )    
(510
 )
Impairments    
-
      
-
      
-
      
-
      
20
      
-
      
20
  
Depreciation for the year    
629
      
699
      
-
      
1,705
      
106
      
352
      
3,491
  
Foreign exchange movement    
-
      
61
      
-
      
-
      
22
      
(3
 )    
80
  
Balance at December 31, 2016    
2,950
      
4,541
      
-
      
13,229
      
642
      
1,844
      
23,206
  
Balance at January 1, 2017    
2,950
      
4,541
      
-
      
13,229
      
642
      
1,844
      
23,206
  
Depreciation for the year    
686
      
631
      
-
      
2,153
      
115
      
178
      
3,763
  
Foreign exchange movement    
-
      
-
      
-
      
-
      
4
      
1
      
5
  
Balance at December 31, 2017    
3,636
      
5,172
      
-
      
15,382
      
761
      
2,023
      
26,974
  
                                                         
Carrying amounts                                                        
At December 31, 2016    
5,417
      
40,537
      
6,967
      
11,307
      
234
      
411
      
64,873
  
At December 31, 2017    
5,798
      
56,326
      
6,967
      
12,499
      
182
      
306
      
82,078