Supplemental Information on Oil and Gas Operations - Developed and undeveloped reserves (Details) - USD ($)	12 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Proved reserves
Extensions, Acquisitions and discoveries	$ 0	$ 13,935,000
Capitalized Costs Related to Oil and Gas Assets
Proved properties	7,753,575	8,062,394
Unproved	100,000	1,355,565
Total capitalized costs, gross	7,853,575	21,617,959
Less: accumulated impairment	(6,975,349)	(5,960,948)
Total capitalized costs, gross	878,226	15,657,011
Costs incurred in Oil and Gas Activities
Development	102,864	8,701,100
Exploration	0	0
Net costs incurred	102,864	8,701,100
MBbls [Member]
Proved reserves
Proved reserves	508	0
Extensions, Acquisitions and discoveries	0	508
Dispositions	(301)	0
Production	(1)	0
Revisions of prior estimates	0	0
Proved reserves	206	508
Proved and unproved
Proved developed producing	0	35
Non-producing	206	286
Proved undeveloped	0	187
Total Proved reserves	206	508
Gas [Member]
Proved reserves
Proved reserves	868	0
Extensions, Acquisitions and discoveries	0	868
Dispositions	(537)	0
Production	0	0
Revisions of prior estimates	0	0
Proved reserves	331	868
Proved and unproved
Proved developed producing	0	0
Non-producing	485	331
Proved undeveloped	383	0
Total Proved reserves	$ 868	$ 331