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SIGNIFICANT ACCOUNTING POLICIES - Depreciation (Details) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Depreciation and amortization expense included in operations |  |  |
Depreciation and amortization expense included in operations | $ 188,000 | $ 165,000 | $ 122,000
Depletion of mineral rights | $ 650,000 | $ 614,000 | $ 294,000

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- Definition Depreciation and amortization expense of Mineral Rights + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Depreciation and amortization expense included in operations + References No definition available. + Details
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Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: | fil_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration