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Note 9 - Discontinued Operations (Tables) | 6 Months Ended
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Jun. 30, 2016
Notes Tables |
Disposal Groups, Including Discontinued Operation Balance Sheet [Table Text Block] |
(Amounts in Thousands) |  | June 30, 2016 |  |  | December 31, 2015 |
Current assets |  |  |  |  |  |  |  |
Other assets |  | $ | 85 |  |  |  | 34 |
Total current assets |  |  | 85 |  |  |  | 34 |
Long-term assets |  |  |  |  |  |  |  |
Property, plant and equipment, net (1) |  |  | 81 |  |  |  | 531 |
Other assets |  |  | 303 |  |  |  | — |
Total long-term assets |  |  | 384 |  |  |  | 531 |
Total assets |  | $ | 469 |  |  | $ | 565 |
Current liabilities |  |  |  |  |  |  |  |
Accounts payable |  | $ | 67 |  |  | $ | 85 |
Accrued expenses and other liabilities |  |  | 430 |  |  |  | 437 |
Environmental liabilities |  |  | 24 |  |  |  | 9 |
Total current liabilities |  |  | 521 |  |  |  | 531 |
Long-term liabilities |  |  |  |  |  |  |  |
Closure liabilities |  |  | 126 |  |  |  | 173 |
Environmental liabilities |  |  | 876 |  |  |  | 891 |
Total long-term liabilities |  |  | 1,002 |  |  |  | 1,064 |
Total liabilities |  | $ | 1,523 |  |  | $ | 1,595 |

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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: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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