Percentage of ownership in subsidiary per agreement as collateral.

No definition available.

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

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

+ Details

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

- Definition

Amount of the required periodic payments applied to principal.

+ References

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

+ References

No definition available.

+ Details

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

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

+ Details

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

- 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://fasb.org/us-gaap/role/ref/legacyRef
-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://fasb.org/us-gaap/role/ref/legacyRef
-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 3: http://fasb.org/us-gaap/role/ref/legacyRef
-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

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- 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

+ Details

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

- Details

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

- Details

Name:	us-gaap_TypeOfArrangementAxis=ppsi_USARCAAmendment2017Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=ppsi_USARCAAmendment2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=ppsi_RevolvingCreditFacility1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

DEBT (Details Narrative 1) - USD ($) $ in Thousands	12 Months Ended
DEBT (Details Narrative 1) - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 15, 2018	Dec. 31, 2017	Apr. 30, 2016
Line of Credit Facility [Line Items]
Credit facilities amount outstanding	$ 20,755		$ 17,814
Debt issuance costs	$ 47		102
U.S. Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Credit Facilities Amount to Borrow				$ 19,100
Percentage of subsidiary shares used to secure borrowings in facility	65.00%
Credit facilities amount outstanding	$ 18,800		19,400
U.S. Credit Facilities [Member] \| 2017 US ARCA Amendment [Member]
Line of Credit Facility [Line Items]
Maximum Credit Facilities Amount to Borrow		$ 20,100
U.S. Credit Facilities A [Member]
Line of Credit Facility [Line Items]
Maximum Credit Facilities Amount to Borrow				14,000
U.S. Credit Facilities A [Member] \| 2017 US ARCA Amendment [Member]
Line of Credit Facility [Line Items]
Maximum Credit Facilities Amount to Borrow		$ 15,000
U.S. Credit Facilities A [Member] \| 2017 US ARCA Amendment [Member] \| Bank's Prime Rate [Member]
Line of Credit Facility [Line Items]
Interest rate spread	1.00%
Variable rate description	bank's prime rate on U.S. prime rate loans
U.S. Credit Facilities A [Member] \| 2017 US ARCA Amendment [Member] \| LIBOR [Member]
Line of Credit Facility [Line Items]
Interest rate spread	2.25%
Variable rate description	adjusted LIBOR rate on Eurodollar loans
U.S. Credit Facilities A [Member] \| 2018 US ARCA Amendment [Member] \| Bank's Prime Rate [Member]
Line of Credit Facility [Line Items]
Interest rate spread	0.75%
Variable rate description	bank's prime rate on U.S. prime rate loans
U.S. Credit Facilities A [Member] \| 2018 US ARCA Amendment [Member] \| LIBOR [Member]
Line of Credit Facility [Line Items]
Interest rate spread	2.00%
Variable rate description	adjusted LIBOR rate on Eurodollar loans
United States Credit Facilities B [Member]
Line of Credit Facility [Line Items]
Maximum Credit Facilities Amount to Borrow				5,000
United States Credit Facilities B [Member] \| 2017 US ARCA Amendment [Member]
Line of Credit Facility [Line Items]
Frequency of payments	Quarterly
Quarterly principal payment	$ 31
Balloon payment	$ 4,438
United States Credit Facilities B [Member] \| 2017 US ARCA Amendment [Member] \| LIBOR [Member]
Line of Credit Facility [Line Items]
Interest rate spread	2.50%
Variable rate description	adjusted LIBOR rate on Eurodollar loans
United States Credit Facilities B [Member] \| 2017 US ARCA Amendment [Member] \| U.S. Base Rate [Member]
Line of Credit Facility [Line Items]
Interest rate spread	1.25%
Variable rate description	bank's prime rate on U.S. prime rate loans
United States Credit Facilities B [Member] \| 2018 US ARCA Amendment [Member]
Line of Credit Facility [Line Items]
Frequency of payments	Quarterly
Quarterly principal payment	$ 100
Balloon payment	$ 2,338
U.S. Credit Facility - MasterCard [Member]
Line of Credit Facility [Line Items]
Maximum Credit Facilities Amount to Borrow				$ 100
Credit Facility B [Member] \| 2017 US ARCA Amendment [Member]
Line of Credit Facility [Line Items]
Frequency of payments	Quarterly
Quarterly principal payment	$ 31
U.S. Facilities A [Member]
Line of Credit Facility [Line Items]
Credit facilities amount outstanding	15,000		14,900
USD Facility B [Member]
Line of Credit Facility [Line Items]
Credit facilities amount outstanding	$ 3,800		$ 4,500