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GOODWILL AND OTHER INTANGIBLE ASSETS (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Gross carrying amount	$ 10,148
Accumulated amortization	(5,562)
Foreign currency translation	(17)
Intangible assets, net	4,569	$ 4,922
Technology Related Industry Accreditations [Member]
Gross carrying amount	706
Foreign currency translation	(17)
Intangible assets, net	$ 689
Customer Relationships [Member]
Weighted average amortization years	7 years
Gross carrying amount	$ 6,689
Accumulated amortization	(5,138)
Intangible assets, net	$ 1,551
Noncompete Agreements [Member]
Weighted average amortization years	4 years
Gross carrying amount	$ 155
Accumulated amortization	(129)
Intangible assets, net	$ 26
Internally Developed Software [Member]
Weighted average amortization years	7 years
Gross carrying amount	$ 289
Accumulated amortization	(134)
Intangible assets, net	$ 155
Developed Technology [Member]
Weighted average amortization years	10 years
Gross carrying amount	$ 493
Accumulated amortization	(161)
Intangible assets, net	332
Trademarks [Member]
Gross carrying amount	1,816
Intangible assets, net	$ 1,816

X

- Definition

This element refers to carrying value of foreign currency translation adjustment to finite intangible assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	ppsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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X

- Definition

Amount before accumulated amortization of intangible assets, excluding goodwill.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
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X

- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph ((a)(1),(b))
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Details

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