Earnings Per Share (Details)	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Line Items]
Weighted average common shares outstanding - basic (in shares)	5,443,061	5,342,064	5,442,585	5,325,206
Potentially dilutive common stock equivalents:
Class B common shares	794,522	795,479	794,998	795,479
Restricted stock	0	101,228	0	118,086
Weighted Average Number Diluted Shares Outstanding Adjustment, Total	794,522	896,707	794,998	913,565
Weighted Average Number Of Shares Outstanding, Basic Including Potentially Dilutive Common Stock Equivalents	6,237,583	6,238,771	6,237,583	6,238,771
Less anti-dilutive common stock equivalents	(794,522)	(896,707)	(794,998)	(913,565)
Weighted average common shares outstanding - diluted (in shares)	5,443,061	5,342,064	5,442,585	5,325,206

Name:	biof_EarningsPerShareLineItems
Namespace Prefix:	biof_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The shares of potentially dilutive class B common shares reported during the period.

+ References

No definition available.

+ Details

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

- Definition

The potentially dilutive restricted stock reported during the period.

+ References

No definition available.

+ Details

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

- Definition

The weighted average number of shares outstanding that are basic including potentially dilutive common stock equivalents are reported during the period.

+ References

No definition available.

+ Details

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

- Definition

The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

+ References

+ Details

Name:	us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References

+ Details

Name:	us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Weighted-Average Number of Common Shares Outstanding

-URI http://asc.fasb.org/extlink&oid=6528421

+ Details

Name:	us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration