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PROPERTY AND EQUIPMENT (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 4,063us-gaap_PropertyPlantAndEquipmentGross $ 4,039us-gaap_PropertyPlantAndEquipmentGross
Less: Accumulated depreciation and amortization (3,287)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (2,949)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property, Plant and Equipment, Net 776us-gaap_PropertyPlantAndEquipmentNet 1,090us-gaap_PropertyPlantAndEquipmentNet
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 244us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
296us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
Estimated Useful Lives Shorter of lease or estimated useful life  
Machinery Equipment and Computer Software [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 2,280us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= rily_MachineryEquipmentAndComputerSoftwareMember
2,179us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= rily_MachineryEquipmentAndComputerSoftwareMember
Estimated Useful Lives 3 years  
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 1,151us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
1,176us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
Estimated Useful Lives 3 years  
Capital Lease Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 388us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= rily_CapitalLeaseEquipmentMember
$ 388us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= rily_CapitalLeaseEquipmentMember
Capital Lease Equipment [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Lives 3 years  
Capital Lease Equipment [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Lives 5 years