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REAL ESTATE HELD FOR SALE (Details) (Kaupulehu 2007) | Dec. 31, 2012 item
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Kaupulehu 2007 |
Real estate held for sale |
Number of luxury residences owned | 1

X
- Definition Represents the number of residential units owned. + References No definition available. + Details
Name: | brn_NumberOfResidentialUnitsOwned
Namespace Prefix: | brn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RealEstatePropertiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration