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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2014
Net Cash Provided by (Used in) Operating Activities [Abstract]
Fair value of the common stock warrants recorded as additional paid in capital	$ 16,500pwvi_FairValueOfCommonStockWarrantsRecordedAsAdditionalPaidInCapital	$ 88,000pwvi_FairValueOfCommonStockWarrantsRecordedAsAdditionalPaidInCapital
Fair value of the common stock warrants recorded as derivative liability	$ 16,500pwvi_FairValueOfCommonStockWarrantsRecordedAsDerivativeLiability	$ 88,000pwvi_FairValueOfCommonStockWarrantsRecordedAsDerivativeLiability

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