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Note 6 - Long Term Debt (Details) - Long-term Debt Instruments (USD $) | Mar. 31, 2015 | Dec. 31, 2014
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Debt Instrument [Line Items] |  |
Long-term debt | $ 11,977,000 us-gaap_LongTermDebt | $ 11,372,000 us-gaap_LongTermDebt
Less current portion of long-term debt | 3,723,000 us-gaap_LongTermDebtCurrent | 3,733,000 us-gaap_LongTermDebtCurrent
| 8,254,000 us-gaap_LongTermDebtNoncurrent | 7,639,000 us-gaap_LongTermDebtNoncurrent
Capital lease (interest at rate of 6.0%) | 41,000 us-gaap_CapitalLeaseObligations | 47,000 us-gaap_CapitalLeaseObligations
Revolving Credit [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 1,545,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = pesi_RevolvingCreditMember |
Term Loan [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 8,381,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = pesi_TermLoanMember | 8,952,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = pesi_TermLoanMember
Promissory Note dated February 12, 2013 ("New Note") [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt |  | 10,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = pesi_PromissoryNoteDatedFebruary122013NewNoteMember
Promissory Note dated August 2, 2013 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 2,010,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = pesi_PromissoryNoteDatedAugustSecond2013Member | $ 2,363,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = pesi_PromissoryNoteDatedAugustSecond2013Member

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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- Details
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