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Debt (Narrative) (United States Credit Facilities) (Details) (USD $)	0 Months Ended	3 Months Ended
	Jun. 23, 2013	Mar. 31, 2015	Dec. 31, 2014	Dec. 02, 2014	Jun. 28, 2013
Line of Credit Facility [Line Items]
Credit facilities amount outstanding		7,298,000us-gaap_LineOfCredit	$ 6,860,000us-gaap_LineOfCredit
Term Credit Facility (U.S. Facilities) [Member]
Line of Credit Facility [Line Items]
Credit facility, borrowing capacity				5,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = ppsi_TermCreditFacilityMember
Minimum fixed charge coverage ratio		1.35ppsi_MinimumFixedCoverageRatio / us-gaap_CreditFacilityAxis = ppsi_TermCreditFacilityMember
Percentage of debt to capitalization		50us-gaap_RatioOfIndebtednessToNetCapital1 / us-gaap_CreditFacilityAxis = ppsi_TermCreditFacilityMember
Percentage of subsidiary to secure borrowings in facility	65.00%ppsi_PercentageOfOwnershipInSubsidiaryPerAgreementAsCollateral / us-gaap_CreditFacilityAxis = ppsi_TermCreditFacilityMember
United States Credit Facilities [Member]
Line of Credit Facility [Line Items]
Credit facilities amount outstanding		12,300,000us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember
United States Credit Facilities [Member] | Scenario, Plan [Member]
Line of Credit Facility [Line Items]
Minimum fixed charge coverage ratio		1.25ppsi_MinimumFixedCoverageRatio / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPlanMember
United States Credit Facilities [Member] | Bank of Montreal [Member]
Line of Credit Facility [Line Items]
Credit facility, borrowing capacity					$ 10,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_LineOfCreditFacilityAxis = ppsi_BankOfMontrealMember
United States Credit Facilities [Member] | Prime Rate [Member]
Line of Credit Facility [Line Items]
Interest rate spread		1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_VariableRateAxis = us-gaap_PrimeRateMember
United States Credit Facilities [Member] | LIBOR Eurodollar Loan [Member]
Line of Credit Facility [Line Items]
Interest rate spread		2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_VariableRateAxis = ppsi_LondonInterbankOfferedRateEurodollarLoanMember
Term Loan Facility [Member] | Term Credit Facility (U.S. Facilities) [Member] | Prime Rate [Member]
Line of Credit Facility [Line Items]
Interest rate spread		1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = ppsi_TermCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = ppsi_TermLoanFacilityMember / us-gaap_VariableRateAxis = us-gaap_PrimeRateMember
Term Loan Facility [Member] | Term Credit Facility (U.S. Facilities) [Member] | LIBOR Eurodollar Loan [Member]
Line of Credit Facility [Line Items]
Interest rate spread		2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = ppsi_TermCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = ppsi_TermLoanFacilityMember / us-gaap_VariableRateAxis = ppsi_LondonInterbankOfferedRateEurodollarLoanMember
Maximum [Member] | United States Credit Facilities [Member]
Line of Credit Facility [Line Items]
EBITDA benchmark ratio		3.65ppsi_EarningsBeforeIncomeTaxesDepreciationAndAmortizationBenchmarkRatio / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Fiscal Quarters Ending on of After December 31, 2015 [Member] | Term Credit Facility (U.S. Facilities) [Member]
Line of Credit Facility [Line Items]
EBITDA benchmark ratio		3.00ppsi_EarningsBeforeIncomeTaxesDepreciationAndAmortizationBenchmarkRatio / us-gaap_CreditFacilityAxis = ppsi_TermCreditFacilityMember / us-gaap_RangeAxis = ppsi_DateRangeTwoMember
Quarter Ends March 31, 2015 and September 30, 2015 [Member] | Term Credit Facility (U.S. Facilities) [Member]
Line of Credit Facility [Line Items]
EBITDA benchmark ratio		3.75ppsi_EarningsBeforeIncomeTaxesDepreciationAndAmortizationBenchmarkRatio / us-gaap_CreditFacilityAxis = ppsi_TermCreditFacilityMember / us-gaap_RangeAxis = ppsi_DateRangeThreeMember
Quarter End June 30, 2015 [Member] | United States Credit Facilities [Member]
Line of Credit Facility [Line Items]
EBITDA benchmark ratio		3.25ppsi_EarningsBeforeIncomeTaxesDepreciationAndAmortizationBenchmarkRatio / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RangeAxis = ppsi_DateRangeFourMember
Quarter End December 31, 2015 [Member] | Term Credit Facility (U.S. Facilities) [Member]
Line of Credit Facility [Line Items]
EBITDA benchmark ratio		2.75ppsi_EarningsBeforeIncomeTaxesDepreciationAndAmortizationBenchmarkRatio / us-gaap_CreditFacilityAxis = ppsi_TermCreditFacilityMember / us-gaap_RangeAxis = ppsi_DateRangeSixMember

X

- Definition

EBITDA Benchmark Ratio.

+ References

No definition available.

+ Details

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Balance Type:	na
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X

- Definition

Details pertaining to maximum funded debt to EBITDA ratio.

+ References

No definition available.

+ Details

Name:	ppsi_MinimumFixedCoverageRatio
Namespace Prefix:	ppsi_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of ownership in subsidiary per agreement as collateral.

+ References

No definition available.

+ Details

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Namespace Prefix:	ppsi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

X

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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

Indebtedness divided by net capital.

+ References

No definition available.

+ Details

Name:	us-gaap_RatioOfIndebtednessToNetCapital1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

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- Details

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- Details

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Balance Type:
Period Type:

X

- Details

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Balance Type:
Period Type:

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- Details

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- Details

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- Details

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