Concentrations, Risks and Uncertainties (Details Narrative) - USD ($)	9 Months Ended
Feb. 28, 2019	Feb. 28, 2018
Concentration risk percentage	99.00%	98.00%
Indebted amount	$ 4,467,330
Maturity date	Jan. 15, 2021
Fiscal Year 2019 [Member]
Repurchase of damages from customers	$ 1,249,653
Fiscal Year 2018 [Member]
Repurchase of damages from customers	$ 1,200,335
Sales Revenue, Net [Member] \| Three Customers [Member] \| Fiscal Year 2019 [Member]
Concentration risk percentage	85.00%
Sales Revenue, Net [Member] \| Three Customers [Member] \| Fiscal Year 2018 [Member]
Concentration risk percentage		76.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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The increase (decrease) during the reporting period in the public utility damage costs that will be permitted by regulatory agencies to be recovered from rate payers.

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