Annual report pursuant to Section 13 and 15(d)

Statement of Stockholders' Equtiy

v2.4.1.9
Statement of Stockholders' Equtiy (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Balance $ 12,625,488us-gaap_StockholdersEquity $ 9,533,989us-gaap_StockholdersEquity  
Issuance of common stock and units 16,308,572us-gaap_StockIssuedDuringPeriodValueNewIssues 8,633,855us-gaap_StockIssuedDuringPeriodValueNewIssues  
Issuance of common stock and units, Shares   375,000us-gaap_StockIssuedDuringPeriodSharesNewIssues  
Stock issuance costs (1,159,582)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts (952,490)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts  
Common stock issued in exchange for services, value 409,000us-gaap_StockIssuedDuringPeriodValueIssuedForServices 306,800us-gaap_StockIssuedDuringPeriodValueIssuedForServices  
Shares surrendered for net stock option exercise (100,000)rnn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsValueOfForfeituresInPeriod    
Stock options exercised 358,955us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised 90,000us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised  
Stock options exercised, shares 448,693us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised 375,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised  
Stock warrants exercised 16,084,511rnn_StockWarrantsExercisedValue 3,947,330rnn_StockWarrantsExercisedValue  
Stock based compensation 608,795us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue 565,428us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue  
Net loss (18,521,601)us-gaap_NetIncomeLoss (9,499,424)us-gaap_NetIncomeLoss  
Other Comprehensive Loss (33,647)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent    
Balance 26,580,491us-gaap_StockholdersEquity 12,625,488us-gaap_StockholdersEquity  
Common Stock [Member]      
Balance 14,673us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
11,944us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Balance, shares 146,732,000us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
119,443,194us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Issuance of common stock and units 1,905us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
2,159us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Issuance of common stock and units, Shares 19,047,620us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
21,592,309us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Common stock issued in exchange for services, value 40us-gaap_StockIssuedDuringPeriodValueIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
64us-gaap_StockIssuedDuringPeriodValueIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Common stock issued in exchange for services, shares 400,000us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
640,000us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Stock options exercised 45us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
38us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Stock options exercised, shares 448,693us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
375,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Stock warrants exercised 1,174rnn_StockWarrantsExercisedValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
468rnn_StockWarrantsExercisedValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Stock warrants exercised, shares 11,738,220rnn_StockWarrantsExercisedShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
4,681,497rnn_StockWarrantsExercisedShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Balance, shares 178,366,533us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
146,732,000us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Balance 17,837us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
14,673us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Additional Paid-in Capital [Member]      
Balance 85,449,932us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
72,861,738us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
 
Issuance of common stock and units 16,306,667us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
8,631,696us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
 
Stock issuance costs (1,159,582)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(952,490)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
 
Common stock issued in exchange for services, value 408,960us-gaap_StockIssuedDuringPeriodValueIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
306,736us-gaap_StockIssuedDuringPeriodValueIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
 
Stock options exercised 358,910us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
89,962us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
 
Stock warrants exercised 16,083,337rnn_StockWarrantsExercisedValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
3,946,862rnn_StockWarrantsExercisedValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
 
Stock based compensation 608,795us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
565,428us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
 
Balance 118,057,019us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
85,449,932us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
 
Accumulated Deficit [Member]      
Balance (72,810,707)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
(63,311,283)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Net loss (18,521,601)us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
(9,499,424)us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Balance (91,332,308)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
(72,810,707)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Treasury Stock [Member]      
Balance (28,410)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
  (28,410)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
Balance, shares 14,205us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
  14,205us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
Shares surrendered for net stock option exercise (100,000)rnn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsValueOfForfeituresInPeriod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Shares surrendered for net stock option exercise, Shares 99,010rnn_ShareBasedCompensationByShareBasedPaymentAwardSharesSurrenderedForNetStockOptionExercise
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Balance, shares 113,215us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
  14,205us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
Balance (128,410)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
  (28,410)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
Accumulated Other Comprehensive Loss [Member]      
Other Comprehensive Loss (33,647)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
   
Balance $ (33,647)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember