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EQUITY, SHARE-BASED COMPENSATION AND LIABILITY WARRANTS, TEXT (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Agreement
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]  
Number of warrant agreements outstanding 2ribt_NumberOfWarrantAgreementsOutstanding
Equity Incentive Plan 2014 [Member]  
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]  
Initially reserved (in shares) 1,600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= ribt_EquityIncentivePlan2014Member
Term of options 10 years
Equity Incentive Plan 2014 [Member] | Director and Executive Officers [Member]  
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]  
Granted (in dollars per share) 4.91us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ribt_EquityIncentivePlan2014Member
/ us-gaap_TitleOfIndividualAxis
= ribt_DirectorAndOfficersMember
Compensation expense 0.2us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= ribt_EquityIncentivePlan2014Member
/ us-gaap_TitleOfIndividualAxis
= ribt_DirectorAndOfficersMember
Compensation expense not yet recognized 0.8us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_PlanNameAxis
= ribt_EquityIncentivePlan2014Member
/ us-gaap_TitleOfIndividualAxis
= ribt_DirectorAndOfficersMember
Period over which compensation expense is recognized 2 years 2 months 12 days
Equity Incentive Plan 2014 [Member] | Director and Executive Officers [Member] | Vesting in August 2015 [Member]  
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]  
Granted (in shares) 52,412us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= ribt_EquityIncentivePlan2014Member
/ us-gaap_TitleOfIndividualAxis
= ribt_DirectorAndOfficersMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember
Equity Incentive Plan 2014 [Member] | Director and Executive Officers [Member] | Vesting in August 2014 [Member]  
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]  
Granted (in shares) 44,026us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= ribt_EquityIncentivePlan2014Member
/ us-gaap_TitleOfIndividualAxis
= ribt_DirectorAndOfficersMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember
Equity Incentive Plan 2014 [Member] | Director and Executive Officers [Member] | Vesting in August 2017 [Member]  
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]  
Granted (in shares) 185,182us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= ribt_EquityIncentivePlan2014Member
/ us-gaap_TitleOfIndividualAxis
= ribt_DirectorAndOfficersMember
/ us-gaap_VestingAxis
= ribt_ShareBasedCompensationAwardTrancheFourMember