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Commitments and Contingencies (Details) (USD $)
 1 Months Ended
Oct. 31, 2012
May 31, 2014
Nov. 30, 2012
Oct. 25, 2012
Agreement terminable by either party notice period of days 30 days      
Company pays waste heat solutions per month through Feb. 2013       $ 5,000pwvi_CompanyPaysWasteHeatSolutionsPerMonthThroughFeb2013
Company pays waste heat solutions per month thereafter Feb. 2013       7,500pwvi_CompanyPaysWasteHeatSolutionsPerMonthThereafterFeb2013
Fully vested 10-year option issued to purchase shares of common stock at $.56 per share       500,000pwvi_FullyVested10YearOptionIssuedToPurchaseSharesOfCommonStockAt56PerShare
Right to Purchase of additional shares for options vesting six months from the date of contract       500,000pwvi_RightToPurchaseOfAdditionalSharesForOptionsVestingSixMonthsFromTheDateOfContract
Fair value of the options fully vested recorded as Research and development cost       182,000pwvi_FairValueOfTheOptionsFullyVestedRecordedAsResearchAndDevelopmentCost
Fair value of the options fully vested recorded as general and administrative expenses       182,000pwvi_FairValueOfOptionsFullyVestedRecordedAsGeneralAndAdministrativeExpenses
Price per share of the 10 year options       $ 0.56pwvi_PricePerShareOfThe10YearOptions
Fair value of option vesting was recorded during the fourth quarter of 2012       61,000pwvi_FairValueOfOptionVestingWasRecordedDuringTheFourthQuarterOf2012
Amount recorded during the first quarter of 2013       91,000pwvi_AmountRecordedDuringTheFirstQuarterOf2013
Amount recorded in the second quarter of 2013       30,000pwvi_AmountRecordedInTheSecondQuarterOf2013
Chief Technical Officer [Member]        
Officers salary     12,500us-gaap_OfficersCompensation
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pwvi_ChiefTechnicalOfficerMember		  
Sought back pay to officers     37,500pwvi_SoughtBackPayToOfficers
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pwvi_ChiefTechnicalOfficerMember		  
Expenses reimbursement     5,012pwvi_ExpensesReimbursement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pwvi_ChiefTechnicalOfficerMember		  
Settlement, Amount   30,088us-gaap_LitigationSettlementAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pwvi_ChiefTechnicalOfficerMember		    
Due amount on settlement   5,088pwvi_DueAmountOnSettlement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pwvi_ChiefTechnicalOfficerMember		    
Additional amount payble on settlement   25,000pwvi_AdditionalAmountPaybleOnSettlement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pwvi_ChiefTechnicalOfficerMember		    
Monthly Installment   $ 12,500pwvi_MonthlyInstallment
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pwvi_ChiefTechnicalOfficerMember