Fees paid to Auditors (Tables)

12 Months Ended

Dec. 31, 2017

Auditor's remuneration [abstract]

Disclosure of detailed information about auditors' remuneration [Text Block]

Amounts in US$ '000	2017		2016		2015
Audit fees		726		487		557
Audit related fees		137		-		-
Tax services fees		212		134		129
Non-audit services fees		39		-		-
Fees paid to auditors		1,114		621		686