Long-Term Investments (Details)	12 Months Ended
Sep. 30, 2017
Long-Term Investments (Textual)
Long term investment rate percentage below prime rate	0.375%

Long term investment rate percentage below prime rate.

No definition available.

Name:	dwog_LongTermInvestmentRatePercentageBelowPrimeRate
Namespace Prefix:	dwog_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration