Quarterly report pursuant to Section 13 or 15(d)

Deferred Research And Development Arrangements (Details)

v2.4.1.9
Deferred Research And Development Arrangements (Details) (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2003
Dec. 31, 2014
Deferred Research And Development Arrangements [Abstract]        
Research and development arrangement, one-time fee     $ 1,500,000us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned  
Reduction of research and development expenses 18,750rnn_ResearchAndDevelopementAgreementPeriodExpenseReductionAmount 18,750rnn_ResearchAndDevelopementAgreementPeriodExpenseReductionAmount    
Research and development period 20 years      
Deferred Research and Development Arrangement $ 581,250rnn_DeferredResearchAndDevelopmentArrangement     $ 600,000rnn_DeferredResearchAndDevelopmentArrangement
Royalties paid, percentage of net sales 3.00%rnn_ResearchAndDevelopementAgreementRoyaltyPercentageOfNetSales