Annual report pursuant to Section 13 and 15(d)

8. DERIVATIVES (Details - Recognized gains/losses)

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8. DERIVATIVES (Details - Recognized gains/losses) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]      
Realized Gains (Losses) $ 1,386 $ (338) $ (1,144)
Unrealized Gains (Losses) (3,370) (204) 336
Commodity contracts [Member] | Non Designated Derivative Instruments [Member] | Cost of goods sold [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Realized Gains (Losses) 1,386 (338) (1,144)
Unrealized Gains (Losses) $ (3,370) $ (204) $ 336