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Acquisition Parentheticals (Details) (USD $) | Apr. 30, 2012
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Acquisition Parentheticals |
Warrants For Cornerstone Acquisition Exercisable January 1, 2012 - December 31, 2016 | 100,000pwvi_WarrantsForCornerstoneAcquisitionExercisableJanuary12012December3120161
Exercise price of these warrants | $ 2.00pwvi_ExercisePriceOfTheseWarrants
Warrants for Cornerstone Acquisition Exercisable July 1, 2012 through June 30, 2017 | 100,000pwvi_WarrantsForCornerstoneAcquisitionExercisableJuly12012ThroughJune302017
Exercise price of these warrants, | $ 3.00pwvi_ExercisePriceOfTheseWarrants1
Warrants For Cornerstone Acquisition Exercisable January 1, 2013 through December 31, 2017 | 100,000pwvi_WarrantsForCornerstoneAcquisitionExercisableJanuary12013ThroughDecember312017
Exercise price of warrants issued in transaction (in Dollars per share) | $ 4.00pwvi_ExercisePriceOfWarrantsIssuedInTransactionInDollarsPerShare
Warrants For Cornerstone Acquisition | 300,000pwvi_WarrantsForCornerstoneAcquisition
Issuance of warrants in business acquisition, Value (in Dollars) | $ 201,000pwvi_IssuanceOfWarrantsInBusinessAcquisitionValueInDollars
Risk free interest rate | 1.04%pwvi_RiskFreeInterestRate
Expected volatility rate | 79.10%pwvi_ExpectedVolatilityRate
Equity issued in business combination, fair value (in Dollars) | 3,297,200pwvi_EquityIssuedInBusinessCombinationFairValueInDollars

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