Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 45
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 35
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- References

No definition available.

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- Definition

Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 35
-Paragraph 8
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-Publisher FASB
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-SubTopic 20
-Section 50
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- Definition

Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

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-Publisher FASB
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-Topic 410
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-Paragraph 1
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Asset Retirement Obligation - Schedule of Asset Retirement Obligation (Details) - USD ($)	9 Months Ended		12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Apr. 30, 2018
Asset Retirement Obligation Disclosure [Abstract]
Balance, beginning of period
Addition and changes in estimates	81,884
Accretion expense	4,854
Balance, end of period	$ 86,739