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Segment Reporting - Schedule of Revenue by Major Customers by Reporting Segments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Revenues	$ 6,312,000	$ 4,419,000
Federal Government [Member]
Revenues	36,654,000	27,354,000
Federal Government [Member] | Treatment [Member]
Revenues	27,591,000	21,434,000
Federal Government [Member] | Services [Member]
Revenues	$ 9,063,000	$ 5,920,000

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Period Type:	duration

X

- Details

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X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=PESI_TreatmentMember
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X

- Details

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