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ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES. (Details 3) | 12 Months Ended
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Dec. 31, 2019
Buildings [Member] |
Property Plant and Equipment Useful Life | 40 years
Facilities and plant equipment [Member] | Minimum [Member] |
Property Plant and Equipment Useful Life | 10 years
Facilities and plant equipment [Member] | Maximum [Member] |
Property Plant and Equipment Useful Life | 25 years
Other equipment, vehicles and furniture [Member] | Minimum [Member] |
Property Plant and Equipment Useful Life | 5 years
Other equipment, vehicles and furniture [Member] | Maximum [Member] |
Property Plant and Equipment Useful Life | 10 years

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=peix_FacilitiesAndPlanEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OtherMachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |