2.4.0.81040 - Disclosure - CONCENTRATIONStruefalsefalse1falsefalsefalseD2013Q3YTDhttp://www.sec.gov/CIK0001286964duration2012-11-01T00:00:002013-07-31T00:00:001true1hlb_ConcentrationDisclosureAbstracthlb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false2hlb_ConcentrationDisclosureTextBlockhlb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;">
<p style="MARGIN: 0in 0in 0pt;"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2">4.</font></b><b><font style="FONT-SIZE: 3pt; FONT-WEIGHT: bold;" size="1">                           </font></b> <b><font style="FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2">CONCENTRATIONS</font></b></p>
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<p style="MARGIN: 0in 0in 0pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">The Company sells all of the ethanol and dry distiller grains produced to one customer under marketing agreements at July 31, 2013.</font></p>
</div>falsefalsefalsenonnum:textBlockItemTypenaThe entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.No definition available.false0falseCONCENTRATIONSUnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.heronlakebioenergy.com/role/DisclosureConcentrations12