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Business Segment and Geographic Information (Schedule of Geographical Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Revenues	$ 28,887us-gaap_Revenues	$ 20,893us-gaap_Revenues
United States [Member]
Segment Reporting Information [Line Items]
Revenues	18,398us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US	10,319us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US
Canada [Member]
Segment Reporting Information [Line Items]
Revenues	10,474us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_CA	10,574us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_CA
Others [Member]
Segment Reporting Information [Line Items]
Revenues	$ 15us-gaap_Revenues / us-gaap_StatementGeographicalAxis = ppsi_OthersCountriesMember

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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