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BUSINESS (Details)	Sep. 30, 2019 Location
BUSINESS [Abstract]
Number of locations	4
Number of locations in California	2
Number of locations in Louisiana	1

No definition available.

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Number of locations producing products of stabilized rice bran (SRB).

No definition available.

Name:	ribt_NumberOfLocations
Namespace Prefix:	ribt_
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Number of locations in a particular location.

No definition available.

Name:	ribt_NumberOfLocationsInCalifornia
Namespace Prefix:	ribt_
Data Type:	xbrli:integerItemType
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Number of locations in a particular location.

No definition available.

Name:	ribt_NumberOfLocationsInLouisiana
Namespace Prefix:	ribt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant