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Inventories (Narrative) (Details) $ in Millions	Sep. 30, 2015 USD ($)
Inventories [Abstract]
Goods in transit	$ 0.1
Obsolete inventory due to product integration	$ 0.6

X

- Definition

Inventory specific reserve for obsolete product due to line integration.

+ References

No definition available.

+ Details

Name:	ppsi_InventorySpecificReserveForObsoleteProductDueToLineIntegration
Namespace Prefix:	ppsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_InventoryDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Gross amount of merchandise or supplies to which the entity holds the title but does not hold physical possession because the goods are currently being transported.

+ 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 210.5-02.6(a))



-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 6



-Subparagraph a



-Article 5

+ Details

Name:	us-gaap_OtherInventoryInTransit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant