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Debt (Schedule of Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Debt Instrument [Line Items] |  |
Total debt | $ 7,255 ppsi_LongTermDebtAndCapitalLeaseObligations1 | $ 12,022 ppsi_LongTermDebtAndCapitalLeaseObligations1
Less current portion | (1,277)us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent | (2,483)us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent
Total long-term debt | 5,978 us-gaap_LongTermDebtAndCapitalLeaseObligations | 9,539 us-gaap_LongTermDebtAndCapitalLeaseObligations
Term Credit Facilities [Member] |  |
Debt Instrument [Line Items] |  |
Total debt | 6,654 ppsi_LongTermDebtAndCapitalLeaseObligations1 / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | 11,165 ppsi_LongTermDebtAndCapitalLeaseObligations1 / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember
Other Notes Payable [Member] |  |
Debt Instrument [Line Items] |  |
Total debt | 70 ppsi_LongTermDebtAndCapitalLeaseObligations1 / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember | 260 ppsi_LongTermDebtAndCapitalLeaseObligations1 / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Capital Lease Obligations [Member] |  |
Debt Instrument [Line Items] |  |
Total debt | 9 ppsi_LongTermDebtAndCapitalLeaseObligations1 / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember | 10 ppsi_LongTermDebtAndCapitalLeaseObligations1 / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember
Nexus Promissory Note [Member] |  |
Debt Instrument [Line Items] |  |
Total debt | $ 522 ppsi_LongTermDebtAndCapitalLeaseObligations1 / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember | $ 587 ppsi_LongTermDebtAndCapitalLeaseObligations1 / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember

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- Definition Carrying value as of balance sheet of total debt and capital lease obligations. + References No definition available. + Details
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- Details
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- Definition Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer. + 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 210.5-02.22) -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 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section H + Details
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- Definition Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer. + 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 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Details
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- Details
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- Details
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- Details
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