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Note 3 - Intangible Assets (Details) (USD $)
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3 Months Ended | |
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Mar. 31, 2015
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Mar. 31, 2014
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| Note 3 - Intangible Assets (Details) [Line Items] | ||
| Amortization of Intangible Assets | $ 127,000us-gaap_AmortizationOfIntangibleAssets | $ 176,000us-gaap_AmortizationOfIntangibleAssets |
| PCB Permit [Member] | ||
| Note 3 - Intangible Assets (Details) [Line Items] | ||
| Number Of Definte-Lived Permits |
1pesi_NumberOfDefiniteLivedPermits / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = pesi_PCBPermitMember |
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- Definition
Represents the number of definite lived permits. No definition available.
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- Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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