Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details)

v2.4.1.9
Subsequent Events (Details) (USD $)
 0 Months Ended 3 Months Ended 12 Months Ended
Apr. 14, 2014
Mar. 16, 2015
Dec. 31, 2014
Dec. 31, 2013
Subsequent Event [Line Items]        
Stock options granted   3,376,316us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 2,528,499us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 2,450,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Proceeds from Stock Options Exercised     $ 258,955us-gaap_ProceedsFromStockOptionsExercised $ 90,000us-gaap_ProceedsFromStockOptionsExercised
Number of options exercised 125,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised   448,693us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised 375,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Aggregate offering price   40,000,000rnn_SharesAvailableForIssuanceAggregateOfferingPrice
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember 		   
Commission   3.00%rnn_SaleOfStockCommissionRate
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember 		   
Proceeds from Stock Options Exercised   705,542us-gaap_ProceedsFromStockOptionsExercised
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember 		   
Number of options exercised   881,928us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember