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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (36,876)us-gaap_NetIncomeLoss $ (5,614)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to cash used in operating activities:    
Depreciation and amortization 912us-gaap_DepreciationDepletionAndAmortization 1,052us-gaap_DepreciationDepletionAndAmortization
Share-based compensation expense 1,741us-gaap_ShareBasedCompensation 2,719us-gaap_ShareBasedCompensation
Non-cash interest expense   53dwch_NonCashInterestExpenseOnWarrants
Deferred income taxes (2,573)us-gaap_DeferredIncomeTaxExpenseBenefit  
Impairment of goodwill and long-lived assets 32,009us-gaap_GoodwillAndIntangibleAssetImpairment  
Changes in operating assets and liabilities:    
Accounts receivable 1,577us-gaap_IncreaseDecreaseInAccountsReceivable 1,289us-gaap_IncreaseDecreaseInAccountsReceivable
Prepaid expenses and other assets (382)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets 165us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Accounts payable, accrued expenses and other liabilities (236)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities (1,345)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Deferred revenue (350)us-gaap_IncreaseDecreaseInDeferredRevenue (255)us-gaap_IncreaseDecreaseInDeferredRevenue
Cash used in operating activities (4,178)us-gaap_NetCashProvidedByUsedInOperatingActivities (1,936)us-gaap_NetCashProvidedByUsedInOperatingActivities
CASH FLOWS FROM INVESTING ACTIVITIES:    
Capitalized software development costs   (250)dwch_CapitalizedSoftwareDevelopmentCosts
Purchases of property and equipment (238)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (66)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Cash used in investing activities (238)us-gaap_NetCashProvidedByUsedInInvestingActivities (316)us-gaap_NetCashProvidedByUsedInInvestingActivities
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from exercise of stock options   41us-gaap_ProceedsFromStockOptionsExercised
Repayments on debt   (167)us-gaap_RepaymentsOfDebt
Capitalized debt issuance costs   (5)us-gaap_PaymentsOfFinancingCosts
Cash used in financing activities   (131)us-gaap_NetCashProvidedByUsedInFinancingActivities
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS (61)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents 38us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
INCREASE IN CASH AND CASH EQUIVALENTS (4,477)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (2,345)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 47,668us-gaap_CashAndCashEquivalentsAtCarryingValue 10,312us-gaap_CashAndCashEquivalentsAtCarryingValue
CASH AND CASH EQUIVALENTS, END OF PERIOD 43,191us-gaap_CashAndCashEquivalentsAtCarryingValue 7,967us-gaap_CashAndCashEquivalentsAtCarryingValue
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:    
Interest paid   80us-gaap_InterestPaid
Income taxes paid $ 8us-gaap_IncomeTaxesPaid $ 21us-gaap_IncomeTaxesPaid