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Supplementary Information On Oil and Gas Reserves (Unaudited) (Details 2) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Sep. 30, 2013
Oil and Gas Properties [Abstract]    
Future cash inflows $ 31,062us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows [1]   
Future Royalties (2,456)dwog_FutureNetCashFlowsRelatingToProvedOilAndGasReservesRoyalties [1]   
Future Operating costs (13,040)us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts [1]   
Future Development Costs (8,586)us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts [1]   
Future abandonment costs (161)dwog_FutureNetCashFlowsRelatingToProvedOilAndGasReservesAbandonmentCosts [1]   
Future income tax expenses    [1]   
Future net cash flows 6,819us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows [1]   
10% annual discount for estimated timing of cash flows (4,919)us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows [1]   
Standardize measure of discounted future net cash flows $ 1,900us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves [1]   
[1] Future net cash flows were converted from Cdn$ to US$ in this table based on the year-end exchange rate of $0.8962.