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Leases - Narrative (Details)	Jul. 31, 2019 contract
Leases [Abstract]
Number of lease contracts	0

X

- Definition

Lessee, Financing Lease, Number Of Contracts

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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