Annual report pursuant to Section 13 and 15(d)

Note 12 - Income Taxes (Details) - Reconciliation Between Expected Tax Benefit using the Federal Statutory Rate

v2.4.1.9
Note 12 - Income Taxes (Details) - Reconciliation Between Expected Tax Benefit using the Federal Statutory Rate (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Reconciliation Between Expected Tax Benefit using the Federal Statutory Rate [Abstract]    
Tax benefit at statutory rate $ (864)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate $ (11,880)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
State tax benefit, net of federal benefit (66)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes (102)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Permanent items 137us-gaap_IncomeTaxReconciliationNondeductibleExpense 166us-gaap_IncomeTaxReconciliationNondeductibleExpense
Non-deductible Goodwill 129pesi_IncomeTaxRateReconciliationNondeductibleGoodwillAmount 9,471pesi_IncomeTaxRateReconciliationNondeductibleGoodwillAmount
Difference in foreign rate 98us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential  
Reversal of deferred tax assets for divested facility (SYA) 99pesi_IncometaxReconciliationReversalOfDeferredTaxAssetsForDivestedFacility  
Reversal of deferred tax assets on stock compensation 593pesi_IncomeTaxReconciliationReversalOfDeferredTaxAssetsOnStockCompensation  
Other 75us-gaap_IncomeTaxReconciliationOtherAdjustments 125us-gaap_IncomeTaxReconciliationOtherAdjustments
Reserve for uncertain tax positions   180us-gaap_IncomeTaxReconciliationTaxContingenciesOther
Increase in valuation allowance 216us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther 1,415us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther
Income tax expense (benefit) $ 417us-gaap_IncomeTaxExpenseBenefit $ (625)us-gaap_IncomeTaxExpenseBenefit