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Note 11 - Accrued Closure Costs and ARO (Details Textual) | 12 Months Ended
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Dec. 31, 2015 USD ($)
Perma-Fix Northwest Richland, Inc [Member] |
Asset Retirement Obligation, Liabilities Settled | $ 331,000
Asset Retirement Obligation, Revision of Estimate | (175,000)
Asset Retirement Obligation, Liabilities Settled | 331,000
Asset Retirement Obligation, Revision of Estimate | $ (175,000)

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- Definition Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Amount of the Increase or Decrease in the amount of the asset retirement obligation during the current period for changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | dei_LegalEntityAxis=pesi_PermaFixNorthwestRichlandIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |