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Note 10 - Property, Plant, and Equipment (Details) (USD $)
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1 Months Ended | 12 Months Ended | 1 Months Ended | ||
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Jun. 30, 2012
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2013
Cameron, Louisiana Menhaden Processing Plant [Member]
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| Note 10 - Property, Plant, and Equipment (Details) [Line Items] | |||||
| Depreciation | $ 18,900,000 | $ 16,300,000 | $ 14,700,000 | ||
| Interest Costs Capitalized | 312,300 | 765,300 | 245,300 | ||
| Impairment of Long-Lived Assets to be Disposed of | 4,796,000 | ||||
| Proceeds from Sale of Property, Plant, and Equipment | 5,200,000 | ||||
| Gain (Loss) on Disposition of Property Plant Equipment | $ 4,000,000 | ||||