Quarterly report pursuant to Section 13 or 15(d)

Warrants (Summary Of Changes In Warrants Outstanding During The Period) (Details)

v2.4.1.9
Warrants (Summary Of Changes In Warrants Outstanding During The Period) (Details) (USD $)
 0 Months Ended 3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Mar. 31, 2015
Mar. 31, 2014
Warrants [Abstract]        
Number of warrants, Outstanding 13,205,871us-gaap_ClassOfWarrantOrRightOutstanding 24,968,868us-gaap_ClassOfWarrantOrRightOutstanding 13,205,871us-gaap_ClassOfWarrantOrRightOutstanding 24,968,868us-gaap_ClassOfWarrantOrRightOutstanding
Weigted average exercise price, Outstanding $ 1.07invest_InvestmentWarrantsExercisePrice $ 0.86invest_InvestmentWarrantsExercisePrice $ 1.07invest_InvestmentWarrantsExercisePrice $ 1.16invest_InvestmentWarrantsExercisePrice
Number of warrants, Issued        4,761,905rnn_InvestmentWarrantsIssuedNumber
Weighted average exercise price, Issued       $ 1.28rnn_InvestmentWarrantsIssuedWeightedAverageExercisePrice
Number of warrants, Exercised        (10,808,871)rnn_InvestmentWarrantsExercisedNumber
Weighted average exercise price, Exercised       $ 0.52rnn_InvestmentWarrantsExercisedWeightedAverageExercisePrice
Number of warrants, Expired         
Number of warrants, Outstanding     13,205,871us-gaap_ClassOfWarrantOrRightOutstanding 18,921,902us-gaap_ClassOfWarrantOrRightOutstanding
Weigted average exercise price, Outstanding $ 1.07invest_InvestmentWarrantsExercisePrice $ 0.86invest_InvestmentWarrantsExercisePrice $ 1.07invest_InvestmentWarrantsExercisePrice $ 1.16invest_InvestmentWarrantsExercisePrice