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DEBT (Details) (USD $)
 3 Months Ended
Mar. 31, 2015
Lease
Dec. 31, 2014
Capital Leased Assets [Line Items]    
Number of capital lease equipments obligation 2diri_NumberOfCapitalLeaseObligationsEquipment  
Expiration period of capital lease obligations Jun. 30, 2016  
Gross book value of capital leased assets $ 77,000us-gaap_CapitalLeasedAssetsGross $ 646,000us-gaap_CapitalLeasedAssetsGross
Net book value of capital leased assets $ 34,000us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet $ 94,000us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet
Minimum [Member]    
Capital Leased Assets [Line Items]    
Interest rate capital leases (in hundredths) 7.40%diri_InterestRateCapitalLeases
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Maximum [Member]    
Capital Leased Assets [Line Items]    
Interest rate capital leases (in hundredths) 8.90%diri_InterestRateCapitalLeases
/ us-gaap_RangeAxis
= us-gaap_MaximumMember