XML 145 R131.htm IDEA: XBRL DOCUMENT
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Inventory, net (Details Textual) | Dec. 31, 2017
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Disclosure of Inventory, net [Abstract] |
Ore extract and process volume per day | 18,000

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- References No definition available. + Details
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Namespace Prefix: | cik0001013131_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The volume of extraction and process of ore per day. + References No definition available. + Details
Name: | cik0001013131_OreExtractAndProcessVolumePerDay
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:integerItemType
Balance Type: | na
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