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Income Taxes (Rate Reconciliation) (Details) (USD $)	12 Months Ended
	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