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LONG-LIVED ASSETS (Changes in Carrying Amounts of Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount, beginning balance   $ 9,270us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated amortization, beginning balance   (2,180)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Net carrying amount balance 942us-gaap_FiniteLivedIntangibleAssetsNet 7,090us-gaap_FiniteLivedIntangibleAssetsNet
Gross carrying amount, ending balance 9,270us-gaap_FiniteLivedIntangibleAssetsGross 9,270us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated amortization, ending balance (2,355)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization (2,180)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Customer Lists [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount, beginning balance   8,990us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
Accumulated amortization, beginning balance   (2,047)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
Net carrying amount balance 809us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
6,943us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
Gross carrying amount, ending balance 8,990us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
8,990us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
Accumulated amortization, ending balance (2,208)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
(2,047)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
Panopticon [Member] | Intellectual Property [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount, beginning balance 7,900us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_IntellectualPropertyMember
 
Accumulated amortization, beginning balance (1,142)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_IntellectualPropertyMember
 
Net carrying amount balance 2,157us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_IntellectualPropertyMember
6,758us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_IntellectualPropertyMember
Impairment charge (4,338)us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_IntellectualPropertyMember
 
Amortization expense (263)us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_IntellectualPropertyMember
 
Gross carrying amount, ending balance 3,562us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_IntellectualPropertyMember
 
Accumulated amortization, ending balance (1,405)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_IntellectualPropertyMember
 
Panopticon [Member] | Customer Lists [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount, beginning balance 8,990us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
 
Accumulated amortization, beginning balance (2,047)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
 
Net carrying amount balance 809us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
6,943us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
Impairment charge (5,973)us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
 
Amortization expense (161)us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
 
Gross carrying amount, ending balance 3,017us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
 
Accumulated amortization, ending balance $ (2,208)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_BusinessAcquisitionAxis
= dwch_PanopticonMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember