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Transactions in Soles (Tables)
 12 Months Ended
Dec. 31, 2018
Disclosure of Transactions in Soles [Abstract]  
Disclosure of Detailed Information Of Assets And Liabilities Denominated In Foreign Currency [Text Block]
As of December 31, 2018 and 2017, the Group presents the following assets and liabilities originally denominated in Soles by its equivalent in U.S. dollars:
 
 
 
2018
 
 
2017
 
 
 
US$(000)
 
 
US$(000)
 
 
 
 
 
 
 
 
Assets
 
 
 
 
 
 
 
 
Cash and cash equivalents
 
 
11,526
 
 
 
6,233
 
Trade and other receivables
 
 
88,513
 
 
 
154,506
 
Income tax credit
 
 
24,277
 
 
 
24,779
 
Prepaid expenses
 
 
-
 
 
 
1,182
 
 
 
 
124,316
 
 
 
186,700
 
 
 
 
 
 
 
 
 
 
Liabilities
 
 
 
 
 
 
 
 
Bank loans
 
 
-
 
 
 
(1,215
)
Trade and other payables
 
 
(53,962
)
 
 
(100,860
)
Income tax payable
 
 
(2,080
)
 
 
(7,088
)
Provisions and contingent liability
 
 
(31,282
)
 
 
(35,572
)
 
 
 
(87,324
)
 
 
(144,735
)
Net asset position
 
 
36,992
 
 
 
41,965