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Note 8 - Related Party Transactions (Details Textual) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Jun. 30, 2013
Jun. 27, 2012
Earnings Before Interest Taxes Depreciation and Amortization $ 1.5inbp_EarningsBeforeInterestTaxesDepreciationAndAmortization  
Director [Member]    
Guarantor Obligations, Current Carrying Value   1.0us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
Chief Executive Officer [Member]    
Guarantor Obligations, Current Carrying Value   1.0us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
Majority Shareholder [Member]    
Guarantor Obligations, Current Carrying Value   $ 1.0us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_MajorityShareholderMember