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Stockholders' Equity (Treasury Shares transactions) (Details) (USD $)
 3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Oct. 16, 2012
May 31, 2012
Apr. 30, 2012
Apr. 07, 2011
Treasury Shares transactions              
Shares of the Company's stock were surrendered to Treasury in exchange for a interest-free note payable             4,500,000pwvi_SharesOfTheCompanySStockWereSurrenderedToTreasuryInExchangeForAInterestFreeNotePayable
Amount reported as note payable to related party             $ 200,000pwvi_AmountReportedAsNotePayableToRelatedParty
Imputed rate of interest on note payable             8.00%pwvi_ImputedRateOfInterestOnNotePayable
The balance of the note payable was settled with the surrender of an additional shares of the Company's stock       3,000,000pwvi_TheBalanceOfTheNotePayableWasSettledWithTheSurrenderOfAnAdditionalSharesOfTheCompanySStock      
Value of note exchanged in Treasury       530,000pwvi_ValueOfNoteExchangedInTreasury      
Company purchased shares of common stock from an affiliate         450,000pwvi_CompanyPurchasedSharesOfCommonStockFromAnAffiliate 100,000pwvi_CompanyPurchasedSharesOfCommonStockFromAnAffiliate  
Purchase price of shares of common stock purchased from an affiliate         $ 90,000pwvi_PurchasePriceOfSharesOfCommonStockPurchasedFromAnAffiliate $ 25,000pwvi_PurchasePriceOfSharesOfCommonStockPurchasedFromAnAffiliate  
Purchase price per share of common stock purchased from an affiliate         $ 0.20pwvi_PurchasePricePerShareOfCommonStockPurchasedFromAnAffiliate $ 0.25pwvi_PurchasePricePerShareOfCommonStockPurchasedFromAnAffiliate  
Amount payable as equal monthly installments       100,000pwvi_AmountPayableAsEqualMonthlyInstallments 10,000pwvi_AmountPayableAsEqualMonthlyInstallments    
Balance of payable included in the "Payable to related parties"   5,000pwvi_BalanceOfPayableIncludedInThePayableToRelatedParties 33,000pwvi_BalanceOfPayableIncludedInThePayableToRelatedParties 100,000pwvi_BalanceOfPayableIncludedInThePayableToRelatedParties 10,000pwvi_BalanceOfPayableIncludedInThePayableToRelatedParties 14,000pwvi_BalanceOfPayableIncludedInThePayableToRelatedParties  
Debt fully Paid $ 100,000pwvi_DebtFullyPaid