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Note 3 - Commitments and Contingencies (Details Textual) (USD $)
3 Months Ended 6 Months Ended 9 Months Ended
Apr. 17, 2015
Apr. 17, 2015
Apr. 18, 2014
Jul. 06, 2012
Capital Lease Obligations Incurred       $ 1,848,000us-gaap_CapitalLeaseObligationsIncurred
Return of Equipment Financed by Capital Lease 656,000brid_ReturnOfEquipmentFinancedByCapitalLease 656,000brid_ReturnOfEquipmentFinancedByCapitalLease 0brid_ReturnOfEquipmentFinancedByCapitalLease  
Gain (Loss) on Disposition of Property Plant Equipment   117,000us-gaap_GainLossOnSaleOfPropertyPlantEquipment 68,000us-gaap_GainLossOnSaleOfPropertyPlantEquipment  
Capital Leases, Future Minimum Payments Due 796,000us-gaap_CapitalLeasesFutureMinimumPaymentsDue 796,000us-gaap_CapitalLeasesFutureMinimumPaymentsDue    
Assets Held under Capital Leases [Member]        
Gain (Loss) on Disposition of Property Plant Equipment $ 75,000us-gaap_GainLossOnSaleOfPropertyPlantEquipment
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_AssetsHeldUnderCapitalLeasesMember