Summary of Significant Accounting Policies	9 Months Ended
Sep. 30, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The Company has disclosed a summary of the Company's significant accounting policies in its Annual Report on Form 10-K for the year ended December 31, 2014. There have been no material changes from the policies previously disclosed other than those noted below. Restricted Cash At September 30, 2015, current restricted cash was $0. At December 31, 2014, current restricted cash was $12,845, which was held in certificates of deposit as pledges for a letter of credit to support a subsidiary's trade activities and the Company's tender offer to acquire the remaining interest in Petrotec. Non-current restricted cash consists of $101,315 as of September 30, 2015 and December 31, 2014, respectively, which is held in a certificate of deposit and pledged to Bank of America, who issued a letter of credit on the Company's behalf to support the payments on the Company's GOZone Bonds. In addition, at September 30, 2015 and December 31, 2014, non-current restricted cash included amounts of $3,000 and $3,500, respectively, which is held in a certificate of deposit and pledged to Bank of America, who issued a letter of credit to support a subsidiary's trade activities. The Company classifies restricted cash between current and non-current assets based on the length of time of the restricted use. Accounts Receivable Accounts receivable are carried at invoiced amount less allowance for doubtful accounts. Management estimates the allowance for doubtful accounts based on existing economic conditions, the financial conditions of customers, and the amount and age of past due accounts. Receivables are considered past due if full payment is not received by the contractual due date. Past due accounts are generally written off against the allowance for doubtful accounts only after reasonable collection attempts have been exhausted. At September 30, 2015, most outstanding receivable amounts related to the 2014 biodiesel mixture excise tax credit reinstatement were received. Property, Plant and Equipment Property, plant and equipment is recorded at cost less accumulated depreciation. Maintenance and repairs are expensed as incurred. Depreciation expense is computed on a straight-line method based upon estimated useful lives of the assets. In April 2015, the Company experienced a fire at its Geismar facility, resulting in the shutdown of the facility. The Company estimated fixed assets of approximately $11,027 were impaired as a result of the fire. As of the date of this report, the Company has received partial proceeds of $6,500 from insurance for the property damage and believes it is probable that it will recover the remaining costs under its insurance policies. As such, the actual receipt was recorded as an offset to the estimated impairment loss. In addition, an amount equal to the remaining estimated impairment loss was recorded as part of accounts receivable on the Condensed Consolidated Balance Sheets at September 30, 2015 and no impact on earnings was recognized. In addition, the Company has received approximately $2,975 as partial proceeds as of the date of this report related to the business interruption portion of the claim reimbursing a portion of lost margin during the repairs of the damages caused by the fire. These proceeds were recorded as an increase in biomass-based diesel sales in the Company's Condensed Consolidated Statements of Operations. In September 2015, another fire occurred at the Geismar facility. The Company is still in the initial stage to estimate the losses caused by this fire. No impairment has been recorded as it cannot be reasonably estimated as of the date of this report. The Company has property damage, business interruption insurance coverages in place and that recoveries under these insurance policies are expected to be probable and as a result, the property damage with respect to this fire is not expected to have a material adverse impact on the Company's financial results. Goodwill Goodwill is tested for impairment annually on July 31 or when impairment indicators exist. Goodwill is allocated and tested for impairment by reporting units. The Company has determined that the reporting units subject to the 2015 goodwill impairment analysis were Biomass-based Diesel; Services; Renewable Chemicals; and Petrotec. The analysis is based on a comparison of the carrying value of the reporting unit to its fair value, determined utilizing both a discounted cash flow methodology and a market comparable methodology. The determination of whether or not the asset has become impaired involves a significant level of judgment in the assumptions underlying the approach used to determine the value of the Company’s reporting units. Changes in estimates of future cash flows caused by items such as unforeseen events or sustained unfavorable changes in market conditions could negatively affect the fair value of the reporting unit’s goodwill asset and result in an impairment charge. The 2015 annual impairment test determined that the fair value of the Biomass-based Diesel reporting unit exceeded its carrying value by approximately 4% and the Services reporting unit exceeded its carrying value by approximately 21% and the Renewable Chemicals reporting unit exceeded its value by approximately 14%, and the Petrotec reporting unit exceeded its value by approximately 26%. Subsequent to our 2015 impairment testing, the Company determined that triggering events have occurred due to the decline in results of operations and decline in stock price during the quarter ended September 30, 2015. Due to the significant effort that is required to determine the implied fair value of the reporting units' goodwill, through assessing revenue growth, operating margin, discount rate assumptions, and the lack of updated market data, the Company is unable to complete a revised impairment analysis as of September 30, 2015. The Company will complete the impairment analysis during fourth quarter and if any impairment would exist, record that during the fourth quarter 2015. No impairment of goodwill was recorded at September 30, 2015 or during 2014. Share Repurchase Programs In February 2015, the Company's board of directors approved a share repurchase program of up to $30,000 of the Company's shares of Common Stock. Shares may be repurchased from time to time in open market transactions, privately negotiated transactions or by other means. The Company accounts for share repurchases using the cost method. Under this method, the cost of the share repurchase is recorded entirely in treasury stock, a contra equity account. During the three and nine months ended September 30, 2015, the Company repurchased shares of Common Stock in the amounts of $7,794 and $19,313, respectively, under this share repurchase program. Foreign Currency Transactions and Translation The Company’s reporting and functional currency is U.S. dollars. Monetary assets and liabilities denominated in currencies other than U.S. dollars are remeasured into their respective functional currencies at exchange rates in effect at the balance sheet date. The resulting exchange gain or loss is included in the Company’s Condensed Consolidated Statements of Operations as foreign exchange gain (loss) unless the remeasurement gain or loss relates to an intercompany transaction that is of a long-term investment nature and for which settlement is not planned or anticipated in the foreseeable future. Gains or losses arising from translation of such transactions are reported as a component of accumulated other comprehensive income (loss) in the Company’s Condensed Consolidated Balance Sheets. The Company translates the assets and liabilities of its foreign subsidiaries from their respective functional currencies to U.S. dollars at the appropriate spot rates as of the balance sheet date. Generally, our foreign subsidiaries use the local currency as their functional currency. Changes in the carrying value of these assets and liabilities attributable to fluctuations in spot rates are recognized in foreign currency translation adjustment, a component of accumulated other comprehensive income (loss) in the Company’s Condensed Consolidated Balance Sheets. Income Taxes The Company uses the asset and liability method to account for income taxes. Accordingly, deferred income taxes are recognized for differences between the financial statement and tax bases of assets and liabilities at enacted statutory tax rates in effect for the years in which differences are expected to reverse. Changes in tax rates are recognized directly to the income statement as they arise. Consideration is given to positive and negative evidence related to the realization of the deferred tax assets and valuation allowances are established to reduce deferred tax assets to the amounts expected to be realized. Significant judgment is required in making this assessment. For uncertain tax positions, the Company recognizes tax benefits that are more likely than not to be sustained upon examination by tax authorities. The amount recognized is measured as the largest amount of benefit that is greater than 50 percent likely to be realized. With regard to non-US subsidiaries, the Company will indefinitely reinvest any future earnings outside of the U.S. and currently does not have any undistributed earnings. New Accounting Standards In July 2015, the FASB decided to defer by one year the effective dates of the new revenue recognition standard as provided by the ASU 2014-09, Revenue from Contracts with Customers: Summary and Amendments that Create Revenue from Contracts with Customers and Other Assets and Deferred Costs—Contracts with Customers. Early adoption is permitted for all entities, but not before the original public entity effective date. For public companies, the update will now be effective for interim and annual periods beginning after December 15, 2017. The Company is currently evaluating the impact that this guidance will have on its consolidated financial statements. In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805): Simplifying the Accounting Measurement-Period Adjustments that eliminates the requirement that an acquirer in a business combination account for measurement-period adjustments retrospectively. Instead, a measurement-period adjustment will be recognized in the period in which it determines the amount of the adjustment. The guidance is effective for public business entities for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. The Company is evaluating the impact this guidance will have on its consolidated financial statements.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The Company has disclosed a summary of the Company's significant accounting policies in its Annual Report on Form 10-K for the year ended December 31, 2014. There have been no material changes from the policies previously disclosed other than those noted below.

Restricted Cash

At September 30, 2015, current restricted cash was $0. At December 31, 2014, current restricted cash was $12,845, which was held in certificates of deposit as pledges for a letter of credit to support a subsidiary's trade activities and the Company's tender offer to acquire the remaining interest in Petrotec. Non-current restricted cash consists of $101,315 as of September 30, 2015 and December 31, 2014, respectively, which is held in a certificate of deposit and pledged to Bank of America, who issued a letter of credit on the Company's behalf to support the payments on the Company's GOZone Bonds. In addition, at September 30, 2015 and December 31, 2014, non-current restricted cash included amounts of $3,000 and $3,500, respectively, which is held in a certificate of deposit and pledged to Bank of America, who issued a letter of credit to support a subsidiary's trade activities. The Company classifies restricted cash between current and non-current assets based on the length of time of the restricted use.

Accounts Receivable

Accounts receivable are carried at invoiced amount less allowance for doubtful accounts. Management estimates the allowance for doubtful accounts based on existing economic conditions, the financial conditions of customers, and the amount and age of past due accounts. Receivables are considered past due if full payment is not received by the contractual due date. Past due accounts are generally written off against the allowance for doubtful accounts only after reasonable collection attempts have been exhausted. At September 30, 2015, most outstanding receivable amounts related to the 2014 biodiesel mixture excise tax credit reinstatement were received.

Property, Plant and Equipment

Property, plant and equipment is recorded at cost less accumulated depreciation. Maintenance and repairs are expensed as incurred. Depreciation expense is computed on a straight-line method based upon estimated useful lives of the assets.

In April 2015, the Company experienced a fire at its Geismar facility, resulting in the shutdown of the facility. The Company estimated fixed assets of approximately $11,027 were impaired as a result of the fire. As of the date of this report, the Company has received partial proceeds of $6,500 from insurance for the property damage and believes it is probable that it will recover the remaining costs under its insurance policies. As such, the actual receipt was recorded as an offset to the estimated impairment loss. In addition, an amount equal to the remaining estimated impairment loss was recorded as part of accounts receivable on the Condensed Consolidated Balance Sheets at September 30, 2015 and no impact on earnings was recognized.

In addition, the Company has received approximately $2,975 as partial proceeds as of the date of this report related to the business interruption portion of the claim reimbursing a portion of lost margin during the repairs of the damages caused by the fire. These proceeds were recorded as an increase in biomass-based diesel sales in the Company's Condensed Consolidated Statements of Operations.

In September 2015, another fire occurred at the Geismar facility. The Company is still in the initial stage to estimate the losses caused by this fire. No impairment has been recorded as it cannot be reasonably estimated as of the date of this report. The Company has property damage, business interruption insurance coverages in place and that recoveries under these insurance policies are expected to be probable and as a result, the property damage with respect to this fire is not expected to have a material adverse impact on the Company's financial results.

Goodwill

Goodwill is tested for impairment annually on July 31 or when impairment indicators exist. Goodwill is allocated and tested for impairment by reporting units. The Company has determined that the reporting units subject to the 2015 goodwill impairment analysis were Biomass-based Diesel; Services; Renewable Chemicals; and Petrotec. The analysis is based on a comparison of the carrying value of the reporting unit to its fair value, determined utilizing both a discounted cash flow methodology and a market comparable methodology. The determination of whether or not the asset has become impaired involves a significant level of judgment in the assumptions underlying the approach used to determine the value of the Company’s reporting units. Changes in estimates of future cash flows caused by items such as unforeseen events or sustained unfavorable changes in market conditions could negatively affect the fair value of the reporting unit’s goodwill asset and result in an impairment charge. The 2015 annual impairment test determined that the fair value of the Biomass-based Diesel reporting unit exceeded its carrying value by approximately 4% and the Services reporting unit exceeded its carrying value by approximately 21% and the Renewable Chemicals reporting unit exceeded its value by approximately 14%, and the Petrotec reporting unit exceeded its value by approximately 26%. Subsequent to our 2015 impairment testing, the Company determined that triggering events have occurred due to the decline in results of operations and decline in stock price during the quarter ended September 30, 2015. Due to the significant effort that is required to determine the implied fair value of the reporting units' goodwill, through assessing revenue growth, operating margin, discount rate assumptions, and the lack of updated market data, the Company is unable to complete a revised impairment analysis as of September 30, 2015. The Company will complete the impairment analysis during fourth quarter and if any impairment would exist, record that during the fourth quarter 2015.

No impairment of goodwill was recorded at September 30, 2015 or during 2014.

Share Repurchase Programs

In February 2015, the Company's board of directors approved a share repurchase program of up to $30,000 of the Company's shares of Common Stock. Shares may be repurchased from time to time in open market transactions, privately negotiated transactions or by other means. The Company accounts for share repurchases using the cost method. Under this method, the cost of the share repurchase is recorded entirely in treasury stock, a contra equity account. During the three and nine months ended September 30, 2015, the Company repurchased shares of Common Stock in the amounts of $7,794 and $19,313, respectively, under this share repurchase program.

Foreign Currency Transactions and Translation

The Company’s reporting and functional currency is U.S. dollars. Monetary assets and liabilities denominated in currencies other than U.S. dollars are remeasured into their respective functional currencies at exchange rates in effect at the balance sheet date. The resulting exchange gain or loss is included in the Company’s Condensed Consolidated Statements of Operations as foreign exchange gain (loss) unless the remeasurement gain or loss relates to an intercompany transaction that is of a long-term investment nature and for which settlement is not planned or anticipated in the foreseeable future. Gains or losses arising from translation of such transactions are reported as a component of accumulated other comprehensive income (loss) in the Company’s Condensed Consolidated Balance Sheets.

The Company translates the assets and liabilities of its foreign subsidiaries from their respective functional currencies to U.S. dollars at the appropriate spot rates as of the balance sheet date. Generally, our foreign subsidiaries use the local currency as their functional currency. Changes in the carrying value of these assets and liabilities attributable to fluctuations in spot rates are recognized in foreign currency translation adjustment, a component of accumulated other comprehensive income (loss) in the Company’s Condensed Consolidated Balance Sheets.

Income Taxes

The Company uses the asset and liability method to account for income taxes. Accordingly, deferred income taxes are recognized for differences between the financial statement and tax bases of assets and liabilities at enacted statutory tax rates in effect for the years in which differences are expected to reverse. Changes in tax rates are recognized directly to the income statement as they arise. Consideration is given to positive and negative evidence related to the realization of the deferred tax assets and valuation allowances are established to reduce deferred tax assets to the amounts expected to be realized. Significant judgment is required in making this assessment.

For uncertain tax positions, the Company recognizes tax benefits that are more likely than not to be sustained upon examination by tax authorities. The amount recognized is measured as the largest amount of benefit that is greater than 50 percent likely to be realized.

With regard to non-US subsidiaries, the Company will indefinitely reinvest any future earnings outside of the U.S. and currently does not have any undistributed earnings.

New Accounting Standards

In July 2015, the FASB decided to defer by one year the effective dates of the new revenue recognition standard as provided by the ASU 2014-09, Revenue from Contracts with Customers: Summary and Amendments that Create Revenue from Contracts with Customers and Other Assets and Deferred Costs—Contracts with Customers. Early adoption is permitted for all entities, but not before the original public entity effective date. For public companies, the update will now be effective for interim and annual periods beginning after December 15, 2017. The Company is currently evaluating the impact that this guidance will have on its consolidated financial statements.

In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805): Simplifying the Accounting Measurement-Period Adjustments that eliminates the requirement that an acquirer in a business combination account for measurement-period adjustments retrospectively. Instead, a measurement-period adjustment will be recognized in the period in which it determines the amount of the adjustment. The guidance is effective for public business entities for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. The Company is evaluating the impact this guidance will have on its consolidated financial statements.