CONCENTRATIONS OF REVENUES AND CREDIT RISK (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2013
Supplier
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Dec. 31, 2012
Supplier
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Dec. 31, 2011
Supplier
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Concentration Risk [Line Items] | |||
Accounts receivable | $ 22,069,000 | $ 15,802,000 | |
Accounts receivable serving as collateral for line of credit | 17,700,000 | 11,700,000 | |
Number of major supplier | 1 | 1 | 1 |
Amount owed to supplier for feedstock purchases | 5,200,000 | 3,700,000 | |
Cash insured by the Federal Deposit Insurance Corporation | 250,000 | ||
Supplier Concentration Risk [Member]
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Concentration Risk [Line Items] | |||
Concentration risk, percentage (in hundredths) | 99.00% | 100.00% | 98.00% |
Sales [Member]
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Concentration Risk [Line Items] | |||
Number of major customer | 2 | 2 | 2 |
Sales [Member] | Revenue Concentration Risk [Member] | Major Customer One [Member]
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Concentration Risk [Line Items] | |||
Concentration risk, percentage (in hundredths) | 16.50% | 13.20% | 12.90% |
Sales [Member] | Revenue Concentration Risk [Member] | Major Customer Two [Member]
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Concentration Risk [Line Items] | |||
Concentration risk, percentage (in hundredths) | 16.20% | 12.10% | 12.60% |
Sales [Member] | Foreign Jurisdiction Concentration Risk [Member]
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Concentration Risk [Line Items] | |||
Concentration risk, percentage (in hundredths) | 26.20% | 24.70% | 22.20% |
Accounts Receivable [Member] | Major Customer One [Member]
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Concentration Risk [Line Items] | |||
Accounts receivable | 1,200,000 | 7,700,000 | |
Accounts Receivable [Member] | Major Customer Two [Member]
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Concentration Risk [Line Items] | |||
Accounts receivable | $ 2,400,000 | $ 2,100,000 |