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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 |  |

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- Definition Custom Element. + References No definition available. + Details
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Namespace Prefix: | pwvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Custom Element. + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Fair value of option vesting was recorded during the first quarter of 2013 + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Fair value of option vesting was recorded during the second quarter of 2013 + References No definition available. + Details
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- Definition Company pays waste heat solutions per month through after Feb. 2013 + References No definition available. + Details
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- Definition Company pays waste heat solutions per month through Feb. 2013 + References No definition available. + Details
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Namespace Prefix: | pwvi_
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- Definition Custom Element. + References No definition available. + Details
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Balance Type: | credit
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- Definition Custom Element. + References No definition available. + Details
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Balance Type: | debit
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- Definition Custom Element. + References No definition available. + Details
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- Definition Fair value of option vesting was recorded during the fourth quarter of 2012 + References No definition available. + Details
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- Definition Fair value of the options fully vested recorded as Research and development cost + References No definition available. + Details
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- Definition Fully vested 10-year option issued to purchase shares of common stock at $.56 per share + References No definition available. + Details
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Namespace Prefix: | pwvi_
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Period Type: | instant

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- Definition Fair value of the options fully vested recorded as Research and development cost price per share + References No definition available. + Details
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- Definition Right to Purchase of additional shares for options vesting six months from the date of contract + References No definition available. + Details
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- Definition Expenditures for salaries of officers. Does not include allocated share-based compensation, pension and post-retirement benefit expense or other labor-related non-salary expense. For commercial and industrial companies, excludes any direct and overhead labor that is included in cost of goods sold. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Details
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