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Income Taxes (Rate Reconciliation) (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Rate Reconciliation |  |
Federal income tax at statutory rate | $ (192,410)pwvi_FederalIncomeTaxAtStatutoryRate | $ (358,686)pwvi_FederalIncomeTaxAtStatutoryRate
State Tax, net of Federal rate | (20,543)pwvi_StateTax | (58,023)pwvi_StateTax
Permanent Differences | 237pwvi_PermanentDifferences | (13,829)pwvi_PermanentDifferences
Forfeiture of fully vested stock compensation | 0pwvi_ForfeitureOfFullyVestedStockCompensation | 255,438pwvi_ForfeitureOfFullyVestedStockCompensation
Rate Change from 39.5% to 37.63% | 0pwvi_RateChangeFrom395To3763 | 88,950pwvi_RateChangeFrom395To3763
Other changes | 16,400pwvi_OtherChanges | 21,891pwvi_OtherChanges
Change in Valuation Allowance | 196,316pwvi_ChangeInValuationAllowance | 64,259pwvi_ChangeInValuationAllowance
Income Tax rate (benefit) | $ 0pwvi_IncomeTaxRateBenefit | $ 0pwvi_IncomeTaxRateBenefit

X
- Definition The amount of the change in the period in the valuation allowance for a specified deferred tax asset. + References No definition available. + Details
Name: | pwvi_ChangeInValuationAllowance
Namespace Prefix: | pwvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of domestic federal statutory tax rate applicable to pretax income (loss). + References No definition available. + Details
Name: | pwvi_FederalIncomeTaxAtStatutoryRate
Namespace Prefix: | pwvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of plan compensation cost forfeited and fully vested during the period. + References No definition available. + Details
Name: | pwvi_ForfeitureOfFullyVestedStockCompensation
Namespace Prefix: | pwvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. + References No definition available. + Details
Name: | pwvi_IncomeTaxRateBenefit
Namespace Prefix: | pwvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate carrying amounts, as of the balance sheet date, of assets not separately disclosed in the balance sheet. + References No definition available. + Details
Name: | pwvi_OtherChanges
Namespace Prefix: | pwvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Difference Amount between domestic federal and state statutory tax rate applicable to pretax income (loss). + References No definition available. + Details
Name: | pwvi_PermanentDifferences
Namespace Prefix: | pwvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of tax differece on account of rate change from 39.5 to 37.63 percentage + References No definition available. + Details
Name: | pwvi_RateChangeFrom395To3763
Namespace Prefix: | pwvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | pwvi_RateReconciliationAbstract
Namespace Prefix: | pwvi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of domestic federal / state statutory tax rate applicable to pretax income (loss). + References No definition available. + Details
Name: | pwvi_StateTax
Namespace Prefix: | pwvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration