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Schedule of Disposal Groups, Including Discontinued Operation Balance Sheet (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Discontinued Operations and Disposal Groups [Abstract] |  |  |
Other assets |  | $ 18 | $ 22
Total current assets |  | 18 | 22
Property, plant and equipment, net | [1] | 81 | 81
Other assets |  |  |
Total long-term assets |  | 81 | 81
Total assets |  | 99 | 103
Accounts payable |  | 3 | 4
Accrued expenses and other liabilities |  | 207 | 150
Environmental liabilities |  | 122 | 744
Total current liabilities |  | 332 | 898
Closure liabilities |  | 148 | 142
Environmental liabilities |  | 654 | 110
Total long-term liabilities |  | 802 | 252
Total liabilities |  | $ 1,134 | $ 1,150
[1] | net of accumulated depreciation of $10,000 for each period presented.

X
- Definition Amount classified as current assets attributable to discontinued operations not held for sale. + References No definition available. + Details
Name: | PESI_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrentNotHeldForSale
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Data Type: | xbrli:monetaryItemType
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X
- Definition Amount classified as environmental liabilities attributable to discontinued operations not held for sale. + References No definition available. + Details
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X
- Definition Amount classified as accrued expenses and other liabilities attributable to discontinued operations not held for sale. + References No definition available. + Details
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Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
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X
- Definition Amount classified as accounts payable attributable to discontinued operations not held for sale. + References No definition available. + Details
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Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
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X
- Definition Amount classified as current and noncurrent assets attributable to discontinued operations not held for sale. + References No definition available. + Details
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- Definition Amount classified as assets attributable to discontinued operations not held for sale. + References No definition available. + Details
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X
- Definition Amount classified as other assets attributable to discontinued operations not held for sale. + References No definition available. + Details
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Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
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- Definition Disposal group including discontinued operation other assets not held for sale noncurrent. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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X
- Definition Amount classified as property, plant and equipment attributable to discontinued operations not held for sale. + References No definition available. + Details
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X
- Definition Amount classified as liabilities attributable to discontinued operations not held for sale. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Amount classified as liabilities attributable to discontinued operations not held for sale. + References No definition available. + Details
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- Definition Amount classified as liabilities attributable to discontinued operations not held for sale. + References No definition available. + Details
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X
- Definition Represents closure liabilities of discontinued operations not held for sale. + References No definition available. + Details
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X
- Definition Amount classified as long-term environmental liabilities attributed to discontinued operations not held for sale. + References No definition available. + Details
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- References No definition available. + Details
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