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CONCENTRATIONS OF REVENUES AND CREDIT RISK (Details) (USD $)
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12 Months Ended | ||||||||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Concentration Risk [Line Items] | |||||||||
| Accounts receivable | $ 15,802,000 | [1] | $ 23,198,000 | [2] | |||||
| Accounts receivable serving as collateral for line of credit | 11,700,000 | 16,800,000 | |||||||
| Number of major supplier | 1 | 1 | 1 | ||||||
| Amount owed by South Hampton to supplier for feedstock purchases | 3,700,000 | 2,800,000 | |||||||
| Cash insured by the Federal Deposit Insurance Corporation | 250,000 | ||||||||
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Supplier Concentration Risk [Member]
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| Concentration Risk [Line Items] | |||||||||
| Concentration risk, percentage (in hundredths) | 100.00% | 98.00% | 98.00% | ||||||
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Sales [Member]
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| Concentration Risk [Line Items] | |||||||||
| Number of major customer | 2 | 2 | 2 | ||||||
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Sales [Member] | Revenue Concentration Risk [Member] | Major Customer One [Member]
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| Concentration Risk [Line Items] | |||||||||
| Concentration risk, percentage (in hundredths) | 13.20% | 12.90% | 18.20% | ||||||
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Sales [Member] | Revenue Concentration Risk [Member] | Major Customer Two [Member]
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| Concentration Risk [Line Items] | |||||||||
| Concentration risk, percentage (in hundredths) | 12.10% | 12.60% | 21.30% | ||||||
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Sales [Member] | Foreign Jurisdiction Concentration Risk [Member]
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| Concentration Risk [Line Items] | |||||||||
| Concentration risk, percentage (in hundredths) | 24.70% | 22.20% | 20.20% | ||||||
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Accounts Receivable [Member] | Major Customer One [Member]
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| Concentration Risk [Line Items] | |||||||||
| Accounts receivable | 2,400,000 | 2,100,000 | |||||||
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Accounts Receivable [Member] | Major Customer Two [Member]
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| Concentration Risk [Line Items] | |||||||||
| Accounts receivable | $ 1,100,000 | $ 2,100,000 | |||||||
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