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Note 9 - Discontinued Operations (Tables) | 6 Months Ended
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Jun. 30, 2017
Notes Tables |
Disposal Groups, Including Discontinued Operation Balance Sheet [Table Text Block] |
|  | June 30, |  |  | December 31, |
(Amounts in Thousands) |  | 2017 |  |  | 2016 |
Current assets |  |  |  |  |  |  |  |
Other assets |  | $ | 92 |  |  | $ | 85 |
Total current assets |  |  | 92 |  |  |  | 85 |
Long-term assets |  |  |  |  |  |  |  |
Property, plant and equipment, net (1) |  |  | 81 |  |  |  | 81 |
Other assets |  |  | 232 |  |  |  | 268 |
Total long-term assets |  |  | 313 |  |  |  | 349 |
Total assets |  | $ | 405 |  |  | $ | 434 |
Current liabilities |  |  |  |  |  |  |  |
Accounts payable |  | $ | 53 |  |  | $ | 13 |
Accrued expenses and other liabilities |  |  | 276 |  |  |  | 268 |
Environmental liabilities |  |  | 637 |  |  |  | 677 |
Total current liabilities |  |  | 966 |  |  |  | 958 |
Long-term liabilities |  |  |  |  |  |  |  |
Closure liabilities |  |  | 116 |  |  |  | 113 |
Environmental liabilities |  |  | 248 |  |  |  | 248 |
Total long-term liabilities |  |  | 364 |  |  |  | 361 |
Total liabilities |  | $ | 1,330 |  |  | $ | 1,319 |

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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