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Note 9 - Discontinued Operations (Tables) | 6 Months Ended
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Jun. 30, 2015
Discontinued Operations and Disposal Groups [Abstract] |
Disposal Groups, Including Discontinued Operation, Income Statement [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
(Amounts in Thousands) |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Net revenues |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest expense |  | $ | — |  |  | $ | (6 | ) |  | $ | (1 | ) |  | $ | (7 | )
Operating loss from discontinued operations |  | $ | (713 | ) |  | $ | (1,169 | ) |  | $ | (936 | ) |  | $ | (1,436 | )
Income tax expense |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Gain on insurance settlement of discontinued operations |  | $ | — |  |  | $ | 3,541 |  |  | $ | — |  |  | $ | 3,541 |
(Loss) income from discontinued operations |  | $ | (713 | ) |  | $ | 2,372 |  |  | $ | (936 | ) |  | $ | 2,105 |
Disposal Groups, Including Discontinued Operation, Balance Sheet [Table Text Block] |
|  | June 30, |  |  | December 31, |
(Amounts in Thousands) |  | 2015 |  |  | 2014 |
Property |  | $ | 450 |  |  | $ | 600 |
Total assets held for sale |  | $ | 450 |  |  | $ | 600 |
|  | June 30, |  |  | December 31, |
(Amounts in Thousands) |  | 2015 |  |  | 2014 |
Current assets |  |  |  |  |  |  |  |
Other assets |  | $ | 22 |  |  |  | 20 |
Total current assets |  |  | 22 |  |  |  | 20 |
Long-term assets |  |  |  |  |  |  |  |
Property, plant and equipment, net (1) |  |  | 81 |  |  |  | 81 |
Total long-term assets |  |  | 81 |  |  |  | 81 |
Total assets not held for sale |  | $ | 103 |  |  | $ | 101 |
Current liabilities |  |  |  |  |  |  |  |
Accounts payable |  | $ | 915 |  |  | $ | 947 |
Accrued expenses and other liabilities |  |  | 500 |  |  |  | 462 |
Environmental liabilities |  |  | 627 |  |  |  | 728 |
Total current liabilities |  |  | 2,042 |  |  |  | 2,137 |
Long-term liabilities |  |  |  |  |  |  |  |
Closure liabilities |  |  | 306 |  |  |  | 302 |
Environmental liabilities |  |  | 369 |  |  |  | 288 |
Total long-term liabilities |  |  | 675 |  |  |  | 590 |
Total liabilities not held for sale |  | $ | 2,717 |  |  | $ | 2,727 |

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- Definition Tabular disclosure of information related to a disposal group for the balance sheet. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component. + References No definition available. + Details
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Namespace Prefix: | pesi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Definition Tabular disclosure of information related to the income statement for a disposal group. Includes, but is not limited to, a discontinued operation. + References No definition available. + Details
Name: | pesi_DisposalGroupsIncludingDiscontinuedOperationIncomeStatementTableTextBlock
Namespace Prefix: | pesi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration