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Consolidated statements of financial position - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Current assets    
Cash and cash equivalents $ 9,325 $ 24,055
Trade and other receivables (Note 6) 6,631 4,002
Inventories (Note 7) 9,366 6,618
Prepaid expenses 869 1,385
Available-for-sale investment 503
Current assets 26,191 36,563
Non-current assets    
Restricted cash 331 151
Long-term investments 4 28
Property, plant and equipment (Note 8) 100,301 80,548
Total assets 126,827 117,290
Current liabilities    
Trade and other payables 10,393 8,727
Credit facilities (Note 9) 7,758
Pre-payment facility (Note 10) 4,000
Current liabilities 14,393 16,485
Non-current liabilities    
Other long-term liabilities 564 882
Pre-payment facility (Note 10) 11,000
Post-employment benefit obligations (Note 11) 8,618 8,116
Decommissioning provision (Note 12) 3,948 3,829
Deferred tax liabilities (Note 17) 246 834
Total liabilities 38,769 30,146
Equity    
Share capital (Note 13) 207,012 202,191
Equity reserve 34,760 34,400
Foreign currency translation reserve 6,284 6,454
Changes in available-for-sale investment 237
Deficit (159,998) (156,138)
Total equity 88,058 87,144
Total liabilities and equity $ 126,827 $ 117,290