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Other Long-Term Liabilties (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Other long-term liability	$ 2,994	$ 372
IRS interest and penalty waivers	400
Past Due Payroll Obligations [Member]
Debt Instrument [Line Items]
Other long-term liability	2,600
IRS interest and penalty waivers	$ 400
Internal Revenue Service (IRS) [Member]
Debt Instrument [Line Items]
Balance of liability under agreements	97.00%

X

- Definition

Percent of outstanding amount under installment agreements.

+ References

No definition available.

+ Details

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Namespace Prefix:	ppsi_
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Balance Type:	na
Period Type:	instant

X

- Definition

The amount for waivers of payroll tax obligations for interest and penalties.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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

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X

- Definition

Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after 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 210.5-02.24)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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X

- Details

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X

- Details

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