Noncontrolling Interest (Details Textual) (USD $)	12 Months Ended	3 Months Ended
Dec. 31, 2012	Dec. 31, 2007	Sep. 30, 2012 Greenlight [Member]	Sep. 30, 2012 Thirdpoint [Member]
Initial Public Offering Price Per Share		$ 210
Equity Method Investment, Ownership Percentage	28.90%
Percentage Of Owned Of Subsidiaries Membership Units	87.30%
Percentage Of Payment To Exchanging Llc Member In Cash Savings Under Tax Benefit Sharing Agreement	85.00%
Remaining Percentage Of Payment To Exchanging Llc Member In Cash Savings Under Tax Benefit Sharing Agreement	15.00%
Membership Units To Be Issued			69,382	34,691

Price per share of initial public offering during the period.

No definition available.

Name:	biof_InitialPublicOfferingPricePerShare
Namespace Prefix:	biof_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of LLC membership units to be issued to the affiliates of investors.

+ References

No definition available.

+ Details

Name:	biof_MembershipUnitsToBeIssued
Namespace Prefix:	biof_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of owned subsidiaries membership units during the period.

+ References

No definition available.

+ Details

Name:	biof_PercentageOfOwnedOfSubsidiariesMembershipUnits
Namespace Prefix:	biof_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of payment for exchanging LIC member in cash savings under tax benefit sharing agreement.

+ References

No definition available.

+ Details

Name:	biof_PercentageOfPaymentToExchangingLlcMemberInCashSavingsUnderTaxBenefitSharingAgreement
Namespace Prefix:	biof_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The remaining percentage of payment for exchanging LIC member in cash savings under tax benefit sharing agreement.

+ References

No definition available.

+ Details

Name:	biof_RemainingPercentageOfPaymentToExchangingLlcMemberInCashSavingsUnderTaxBenefitSharingAgreement
Namespace Prefix:	biof_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant