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Basis of Presentation (Details Narrative) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |
Finite risk sinking fund | $ 16,052 | $ 15,971 | $ 15,726

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- Definition As of the balance sheet date, the total amount into the sinking fund, along with interest income earned, in connection for the company's closure policies. + References No definition available. + Details
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Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Balance Type: | na
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