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Basis of Presentation (Narrative) (Details) CAD in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2015 segment	Nov. 18, 2015 USD ($)	Jun. 30, 2013 CAD	Jun. 30, 2013 USD ($)
Number of reportable segments	2
Term Credit Facilities [Member]
Credit facility, borrowing capacity			CAD 22	$ 17.6
Subsequent Event [Member] | Sublimit for Domestic Operations [Member]
Credit facility, borrowing capacity | $		$ 3.0

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.19(b),22(b))



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 02



-Paragraph 19, 22



-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

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X

- Details

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Data Type:	na
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X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
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Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=ppsi_SublimitForDomesticOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: