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11. COMMITMENTS AND CONTINGENCIES (Details Narrative) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Rent expense | $ 1,454 | $ 2,252
Corn contract |  |
Sales commitments | 959 |
Syrup contracts |  |
Sales commitments | 105 |
Ethanol contracts |  |
Purchase commitments | $ 18,736 |

X
- Definition Sales commitments + References No definition available. + Details
Name: | peix_SalesCommitments
Namespace Prefix: | peix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration