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PROPERTY AND EQUIPMENT (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Summary of property and equipment [Abstract]    
Property and equipment, gross $ 2,435us-gaap_PropertyPlantAndEquipmentGross $ 1,940us-gaap_PropertyPlantAndEquipmentGross
Less: accumulated depreciation and amortization (1,415)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (1,088)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property and equipment, net 1,020us-gaap_PropertyPlantAndEquipmentNet 852us-gaap_PropertyPlantAndEquipmentNet
Depreciation and amortization 327us-gaap_DepreciationDepletionAndAmortization 394us-gaap_DepreciationDepletionAndAmortization
Computer Equipment and Purchased Software [Member]    
Summary of property and equipment [Abstract]    
Property and equipment, gross 1,372us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= diri_ComputerEquipmentsAndPurchasedSoftwareMember
1,361us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= diri_ComputerEquipmentsAndPurchasedSoftwareMember
Estimated useful lives 3 years  
Internally Developed Software [Member]    
Summary of property and equipment [Abstract]    
Property and equipment, gross 907us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareDevelopmentMember
433us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareDevelopmentMember
Estimated useful lives 5 years  
Furniture and Fixtures and Leasehold Improvements [Member]    
Summary of property and equipment [Abstract]    
Property and equipment, gross $ 156us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= diri_FurnituresAndFixturesAndLeaseholdImprovementsMember
$ 146us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= diri_FurnituresAndFixturesAndLeaseholdImprovementsMember
Furniture and Fixtures and Leasehold Improvements [Member] | Minimum [Member]    
Summary of property and equipment [Abstract]    
Estimated useful lives 5 years  
Furniture and Fixtures and Leasehold Improvements [Member] | Maximum [Member]    
Summary of property and equipment [Abstract]    
Estimated useful lives 7 years