Income Taxes	3 Months Ended
Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The provision for income taxes of $0.4 million and $1.0 million for the quarters ended March 31, 2015 and March 27, 2014, respectively, reflects effective tax rates of approximately 50.0% and 38.5%, respectively. The effective tax rates for the quarters ended March 31, 2015 and March 27, 2014 reflect the impact of certain non-deductible expenses. In assessing the realizable value of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which these temporary differences become deductible. The Company has recorded a valuation allowance against deferred tax assets of $2.1 million as of March 31, 2015 and January 1, 2015 as management believes it is more likely than not that certain deferred tax assets will not be realized in future tax periods. Future reductions in the valuation allowance associated with a change in management’s determination of the Company’s ability to realize these deferred tax assets will result in a decrease in the provision for income taxes. The Company files income tax returns in the U.S. federal jurisdiction and certain state jurisdictions as part of the REG income tax filings and files separate income tax returns in various other state jurisdictions as well. The Company's share of the REG current and deferred tax expense is determined on a separate company basis. REG and the Company are no longer subject to U.S. federal, or with limited exceptions, state examinations by tax authorities for years before 2010. However, the taxing authorities still have the ability to review the propriety of tax attributes created in closed tax years if such tax attributes are utilized in an open tax year. In April 2015, the Internal Revenue Service (“IRS”) completed an examination of REG’s 2010 and 2012 federal income tax returns and notified REG that no items were being disputed. However, refund claims submitted by REG in conjunction with the examination process effectively extends the examination period for each year until such claims are resolved. As of March 31, 2015, management believes that it has provided adequate provision for income taxes relative to the refund claims under review.

Income Taxes

The provision for income taxes of $0.4 million and $1.0 million for the quarters ended March 31, 2015 and March 27, 2014, respectively, reflects effective tax rates of approximately 50.0% and 38.5%, respectively. The effective tax rates for the quarters ended March 31, 2015 and March 27, 2014 reflect the impact of certain non-deductible expenses.

In assessing the realizable value of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which these temporary differences become deductible. The Company has recorded a valuation allowance against deferred tax assets of $2.1 million as of March 31, 2015 and January 1, 2015 as management believes it is more likely than not that certain deferred tax assets will not be realized in future tax periods. Future reductions in the valuation allowance associated with a change in management’s determination of the Company’s ability to realize these deferred tax assets will result in a decrease in the provision for income taxes.

The Company files income tax returns in the U.S. federal jurisdiction and certain state jurisdictions as part of the REG income tax filings and files separate income tax returns in various other state jurisdictions as well. The Company's share of the REG current and deferred tax expense is determined on a separate company basis. REG and the Company are no longer subject to U.S. federal, or with limited exceptions, state examinations by tax authorities for years before 2010. However, the taxing authorities still have the ability to review the propriety of tax attributes created in closed tax years if such tax attributes are utilized in an open tax year. In April 2015, the Internal Revenue Service (“IRS”) completed an examination of REG’s 2010 and 2012 federal income tax returns and notified REG that no items were being disputed. However, refund claims submitted by REG in conjunction with the examination process effectively extends the examination period for each year until such claims are resolved. As of March 31, 2015, management believes that it has provided adequate provision for income taxes relative to the refund claims under review.