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Operating segments - Additional Information (Detail)	12 Months Ended
	Jun. 30, 2018 Major_Customer Segments	Jun. 30, 2017 Major_Customer
Disclosure of operating segments [abstract]
Number of operating segments | Segments	0
Number of major customers | Major_Customer	0	0

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- References

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- Definition

Number of major customers.

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- Definition

Number of operating segments.

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No definition available.

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