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Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parentheticals) (Common Stock, USD $) | 6 Months Ended
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Jun. 30, 2013
Common Stock |
Sale of 500,000 shares of common stock | $ 0.25

X
- Definition Represents common stock per share. + References No definition available. + Details
Name: | pwvi_SaleOfCommonStockPerShareOne
Namespace Prefix: | pwvi_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration