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8. DERIVATIVES (Details - Fair value) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Commodity contracts, Other current assets | $ 978 | $ 2,081
Commodity contracts, Other current liabilities | 4,115 | 1,848
Non Designated Derivative Instruments [Member] | Commodity contracts [Member] | Other Current Assets [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |
Commodity contracts, Other current assets | 978 | 2,081
Commodity contracts, Other current liabilities | $ 4,115 | $ 1,848

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- Definition Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959 + Details
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