Name:	ribt_DisposalGroupIncludingDiscontinuedOperationConsiderationNet
Namespace Prefix:	ribt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of expenses incurred for the disposal of assets and liabilities, including discontinued operation.

No definition available.

Name:	ribt_DisposalGroupIncludingDiscontinuedOperationDisposalExpensesIncurred
Namespace Prefix:	ribt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the liability payments during the period.

No definition available.

Name:	ribt_PaymentsForLiabilities
Namespace Prefix:	ribt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

No definition available.

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Payments of cash to employees, including wages and salaries, during the current period.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 17
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-17

Name:	us-gaap_PaymentsToEmployees
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The cash outflow for a borrowing supported by a written promise to pay an obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-15