Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligation - Schedule of Asset Retirement Obligation (Details)

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Asset Retirement Obligation - Schedule of Asset Retirement Obligation (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2020
Oct. 31, 2019
Apr. 30, 2020
Asset Retirement Obligation Disclosure [Abstract]          
Balance, beginning of period     $ 168,392 $ 88,746 $ 88,746
Addition and changes in estimates     13,352   69,172
Accretion expense $ 4,328 $ 2,191 8,388 $ 4,331 10,474
Balance, end of period $ 190,132   $ 190,132   $ 168,392