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8. FAIR VALUE MEASUREMENTS (Details 2) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Assets: |  |
Assets | $ 660 | $ 189
Liabilities: |  |
Liabilities | 11,447 | 5,059
Commodity contracts [Member] |  |
Assets: |  |
Assets | 660 | 189
Liabilities: |  |
Liabilities | 1,020 | 167
Warrants [Member] |  |
Liabilities: |  |
Liabilities | 6,717 | 4,892
Conversion Features [Member] |  |
Liabilities: |  |
Liabilities | 3,710 |
Level 1 [Member] |  |
Assets: |  |
Assets | 660 | 189
Liabilities: |  |
Liabilities | 1,020 | 167
Level 1 [Member] | Commodity contracts [Member] |  |
Assets: |  |
Assets | 660 | 189
Liabilities: |  |
Liabilities | 1,020 | 167
Level 1 [Member] | Warrants [Member] |  |
Liabilities: |  |
Liabilities |  |
Level 1 [Member] | Conversion Features [Member] |  |
Liabilities: |  |
Liabilities |  |
Level 2 [Member] |  |
Assets: |  |
Assets |  |
Liabilities: |  |
Liabilities |  |
Level 2 [Member] | Commodity contracts [Member] |  |
Assets: |  |
Assets |  |
Liabilities: |  |
Liabilities |  |
Level 2 [Member] | Warrants [Member] |  |
Liabilities: |  |
Liabilities |  |
Level 2 [Member] | Conversion Features [Member] |  |
Liabilities: |  |
Liabilities |  |
Level 3 [Member] |  |
Assets: |  |
Assets |  |
Liabilities: |  |
Liabilities | 10,427 | 4,892
Level 3 [Member] | Commodity contracts [Member] |  |
Assets: |  |
Assets |  |
Liabilities: |  |
Liabilities |  |
Level 3 [Member] | Warrants [Member] |  |
Liabilities: |  |
Liabilities | 6,717 | 4,892
Level 3 [Member] | Conversion Features [Member] |  |
Liabilities: |  |
Liabilities | $ 3,710 |

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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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