Oil and Gas Properties (Details Textual)		12 Months Ended
Oil and Gas Properties (Details Textual)	Jul. 31, 2013 USD ($)	Sep. 30, 2018 a
Oil and Gas Properties (Textual)
Oil sands acreage, gross acres \| a		37,322
Oil sands acreage, net acres \| a		29,383
Five oil sands leases, description		Of the Company's acreage, 20,242 gross acres (13,284 net acres) under five oil sands leases were set to expiry on July 10, 2018. In November of 2017, the Company's joint venture partner and operator of two of these five oil sands leases, submitted two continuation applications to the Alberta Oil Sands Tenure division to apply to continue 7,591 gross acres (1,898 net acres) and on January 29, 2018, approval was received from Alberta Energy to continue 6,958 gross acres (1,740 net acres). In June of 2018, the Company as operator of three of these five oil sands leases, submitted three continuation applications to the Alberta Oil Sands Tenure division to apply to continue another 7,591 gross acres (6,832 net acres) where resources were identified and on July 15, 2018, approval was received from Alberta Energy to continue 5,693 gross acres (5,124 net acres). The Company has not yet received approval on one continuation application it submitted in June of 2018 to continue another 1,898 gross acres (1,708 net acres). As of September 30, 2018, a total of 5,693 gross acres (4,713 net acres) on five oil sands leases expired without being continued. These expired lands were primarily areas where the Company was unable to ascertain exploitable resources. Continued leases have no future expiry dates but are subject to yearly escalating rental payments until they are deemed to be producing leases.
Three northern oil sands leases, description		Of the Company's acreage, 19,610 gross acres (17,649 net acres) under three northern oil sands leases are set to expire on August 19, 2019. The Company intends to apply for a term extension on these three northern oil sands leases, however it is not certain if an extension will be granted by Alberta Energy.
One oil sands lease, description		Of the Company's acreage, 3,163 gross acres (3,163 net acres) under one oil sands lease are set to expire on April 9, 2024. It is the Company's opinion that the Company has already met the governmental requirements for this lease and it will be applying to continue this lease beyond its expiry date.
Description for term of capital lease		1) The original requirement was to drill evaluation wells on each section within the lease, however the Alberta Department of Energy has temporarily relaxed the drilling requirements under section 3(2)(a) of the Oil Sands Tenure Regulation of the Mines and Minerals Act of Alberta whereby the drilling requirement is now to drill one evaluation well per three sections; or 2) drill evaluation wells on at least 60% of the sections within the lease of which 25% of the evaluation wells must be cored, and acquire and process two miles of seismic data for the remaining undrilled sections within the lease.
Farmout Agreement [Member]
Oil and Gas Properties (Textual)
Funding for project under agreement \| $	$ 40,000,000
Monthly maximum payable by farmee for operating expense \| $	$ 30,000
Description and terms of farmout agreement	The Company entered into a Farmout agreement (the "Farmout Agreement") with an additional joint venture partner (the "Farmee") to fund the Company's share of the Alberta Energy Regulator ("AER") approved joint Steam Assisted Gravity Drainage Demonstration project ("SAGD Project") at the Company's Sawn Lake heavy oil reservoir in North Central Alberta, Canada. In accordance with the Farmout Agreement the Farmee has agreed to provide up to $40,000,000 in funding for the Company's portion of the costs for the SAGD Project, in return for a net 25% working interest in 12 sections where the Company had a working interest of 50% (before the execution of the Farmout Agreement).

DEEP WELL OIL & GAS INC 10-K