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SUBSEQUENT EVENT (Details) (Subsequent event, Kaupulehu Developments, USD $) | 1 Months Ended
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Feb. 28, 2013
Subsequent event | Kaupulehu Developments |
Subsequent event |
Percentage of sales payment received from sale of the first lot within Phase II of Increment I | $ 300,000

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- Definition The gross cash inflow from the sale of interest in leasehold land. + References No definition available. + Details
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Namespace Prefix: | brn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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Period Type: | duration