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Commitments and Contingencies (Details)	Jun. 25, 2015
Commitments and Contingencies Disclosure [Abstract]
Royalty percentage	2.00%

X

- Definition

Custom Element.

+ References

No definition available.

+ Details

Name:	pwvi_RoyaltyPercentage
Namespace Prefix:	pwvi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration