Oil and Gas Reserve Data (Unaudited) - Schedule of Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Reserves (Details) - USD ($)	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Extractive Industries [Abstract]
Future cash inflows	$ 61,676,000	$ 70,766,000
Future production costs and taxes	(16,682,000)	(19,355,000)
Future development costs	(6,984,000)	(9,424,000)
Future income taxes	(4,675,000)	(5,767,000)
Future net cash flows	33,335,000	36,220,000
Annual 10% discount for estimated timing of cash flows	(14,359,000)	(16,968,000)
Standardized measure of discounted future net cash flows	$ 18,976,000	$ 19,252,000	$ 18,876,000

No definition available.

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- Definition

Amount of estimated future accumulated cash inflow from the sale of proved oil and gas reserves.

+ References

+ Details

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- Definition

Amount of estimated future accumulated cash outflow for costs to be incurred in developing proved oil and gas reserves.

+ References

+ Details

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- Definition

Amount of estimated future accumulated cash outflow for income tax, based on the future income less future expense derived from production and sale of proved oil and gas reserves.

+ References

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- Definition

Amount, after future accumulated cash outflow for development and production costs and future income tax, of estimated future accumulated cash inflow from the sale of proved oil and gas reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Form 20-F
-Section Item 18
-Subsection Instruction 2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62479-109447

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- Definition

Amount of estimated future accumulated cash outflow for costs to be incurred in producing proved oil and gas reserves.

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- Definition

Amount of discount on future accumulated cash inflow, after deducting future accumulated cash outflow for development and production costs and future income tax, from sale of proved oil and gas reserves, using a discount rate of ten percent a year.

+ References

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- Definition

Amount of discounted future accumulated cash inflow relating to proved oil and gas reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Form 20-F
-Section Item 18
-Subsection Instruction 2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 31
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62455-109447

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
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-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62424-109447

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-Publisher FASB
-Name Accounting Standards Codification
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