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Acquisitions (Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 434us-gaap_AmortizationOfIntangibleAssets	$ 79us-gaap_AmortizationOfIntangibleAssets
Titan Energy Worldwide Inc. [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	5,147us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = ppsi_TitanEnergyWorldwideIncorporatedMember
Amortization of intangibles	326us-gaap_AmortizationOfIntangibleAssets / us-gaap_BusinessAcquisitionAxis = ppsi_TitanEnergyWorldwideIncorporatedMember
Titan Energy Worldwide Inc. [Member] | Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period of identifiable intangible assets	4 years
Finite-lived intangible assets acquired	4,320us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = ppsi_TitanEnergyWorldwideIncorporatedMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Titan Energy Worldwide Inc. [Member] | Distributor Territory License [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period of identifiable intangible assets	4 years
Finite-lived intangible assets acquired	474us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = ppsi_TitanEnergyWorldwideIncorporatedMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LicensingAgreementsMember
Titan Energy Worldwide Inc. [Member] | Internally Developed Software [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period of identifiable intangible assets	7 years
Finite-lived intangible assets acquired	289us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = ppsi_TitanEnergyWorldwideIncorporatedMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Titan Energy Worldwide Inc. [Member] | Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period of identifiable intangible assets	1 year
Finite-lived intangible assets acquired	$ 64us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = ppsi_TitanEnergyWorldwideIncorporatedMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

+ References

No definition available.

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