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

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- Definition Inventory specific reserve for obsolete product due to line integration. + References No definition available. + Details
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Namespace Prefix: | ppsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- 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