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Shareholders' Equity (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended	1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014	Dec. 31, 2014
Common stock, par value (in dollars per share)	$ 0.001us-gaap_CommonStockParOrStatedValuePerShare			0.001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, outstanding shares	7,405,962us-gaap_CommonStockSharesOutstanding
Outstanding purchase of warrants (in shares)	280,600us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Warrants exercised	0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised
Stock-based compensation expense	$ 60,000us-gaap_ShareBasedCompensation	$ 36,000us-gaap_ShareBasedCompensation
Stock-based compensation expense unrecognized in the statement of earnings	376,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
Foreign currency translation adjustments	$ (1,508,000)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	$ (676,000)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Warrants Exercise Price $15.43 [Member]
Outstanding purchase of warrants (in shares)	230,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_ClassOfWarrantOrRightAxis = ppsi_WarrantsExercisePriceOneMember
Warrant expiration date range start	Apr. 26, 2015
Warrant expiration date range end	Apr. 30, 2015
Warrants Exercise Price $7.00 [Member]
Outstanding purchase of warrants (in shares)	50,600us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_ClassOfWarrantOrRightAxis = ppsi_WarrantsExercisePriceTwoMember
Strike price of warrants outstanding	$ 7.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = ppsi_WarrantsExercisePriceTwoMember
Warrant expiration date range end			Sep. 18, 2018
Weighted Average [Member]
Strike price of warrants outstanding	$ 13.91us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Weighted Average [Member] | Warrants Exercise Price $15.43 [Member]
Strike price of warrants outstanding	$ 15.43us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = ppsi_WarrantsExercisePriceOneMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
2011 Long-Term Incentive Plan [Member]
Shares available for future grants			320,600us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = ppsi_LongTermIncentivePlanTwentyElevenMember
Titan Energy Worldwide Inc. [Member]
Business acquisition, equity interest issued or issuable, number of shares				233,707us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = ppsi_TitanEnergyWorldwideIncorporatedMember

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