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Common Stock (Narrative) (Details) (USD $)
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0 Months Ended |
12 Months Ended |
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Aug. 01, 2014
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Apr. 14, 2014
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Feb. 10, 2014
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Jan. 21, 2014
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Oct. 16, 2013
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Oct. 10, 2013
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Aug. 01, 2013
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Jul. 26, 2013
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Jun. 10, 2013
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May 10, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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Aug. 01, 2014
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Oct. 16, 2013
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Oct. 10, 2013
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Aug. 01, 2013
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Jul. 26, 2013
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Jun. 10, 2013
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May 10, 2013
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| Class of Stock [Line Items] |
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| Common stock issued for services |
100,000us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
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300,000us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
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200,000us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
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120,000us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
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200,000us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
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120,000us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
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| Shares issued |
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19,047,620us-gaap_StockIssuedDuringPeriodSharesNewIssues
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10,192,309us-gaap_StockIssuedDuringPeriodSharesNewIssues
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11,400,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
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375,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
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| Share Price |
$ 0.73us-gaap_SharePrice
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$ 1.12us-gaap_SharePrice
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$ 1.05us-gaap_SharePrice
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$ 0.52us-gaap_SharePrice
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$ 0.53us-gaap_SharePrice
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$ 0.53us-gaap_SharePrice
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$ 0.50us-gaap_SharePrice
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$ 0.50us-gaap_SharePrice
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$ 0.31us-gaap_SharePrice
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$ 0.73us-gaap_SharePrice
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$ 0.52us-gaap_SharePrice
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$ 0.53us-gaap_SharePrice
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$ 0.53us-gaap_SharePrice
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$ 0.50us-gaap_SharePrice
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$ 0.50us-gaap_SharePrice
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$ 0.31us-gaap_SharePrice
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| Value of shares issued |
$ 73,000us-gaap_StockIssuedDuringPeriodValueIssuedForCash
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$ 336,000us-gaap_StockIssuedDuringPeriodValueIssuedForCash
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$ 106,000us-gaap_StockIssuedDuringPeriodValueIssuedForCash
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$ 63,600us-gaap_StockIssuedDuringPeriodValueIssuedForCash
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$ 100,000us-gaap_StockIssuedDuringPeriodValueIssuedForCash
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$ 37,200us-gaap_StockIssuedDuringPeriodValueIssuedForCash
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| Value of exercised of stock options |
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358,955us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
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90,000us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
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| Shares paid for stock options exercised |
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99,010rnn_SharesPaidForStockOptionExercises
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| Shares issued for options exercised |
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25,990rnn_SharesIssuedForOptionsExercised
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323,693rnn_SharesIssuedForOptionsExercised
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| Cash paid in exchange for legal services |
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1,365,754rnn_CashPaidInExchangeForLegalServices
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432,000rnn_CashPaidInExchangeForLegalServices
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526,845rnn_CashPaidInExchangeForLegalServices
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| Proceeds from issuance |
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20,000,001us-gaap_ProceedsFromIssuanceOfCommonStock
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5,300,001us-gaap_ProceedsFromIssuanceOfCommonStock
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5,700,000us-gaap_ProceedsFromIssuanceOfCommonStock
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| Public offering closing costs |
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519,368rnn_PuplicOfferingClosingCosts
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637,334rnn_PuplicOfferingClosingCosts
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| Number of warrants, Issued |
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4,761,905rnn_InvestmentWarrantsIssuedNumber
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3,567,309rnn_InvestmentWarrantsIssuedNumber
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3,990,000rnn_InvestmentWarrantsIssuedNumber
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4,761,905rnn_InvestmentWarrantsIssuedNumber
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8,421,001rnn_InvestmentWarrantsIssuedNumber
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| Proceeds allocated to financing expense |
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206,172rnn_ProceedsFromIssuanceOfCommonStockAllocatedToExpense
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91,653rnn_ProceedsFromIssuanceOfCommonStockAllocatedToExpense
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112,559rnn_ProceedsFromIssuanceOfCommonStockAllocatedToExpense
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| Issuance cost incurred |
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1,159,582rnn_CommonStockIssuanceCostIncurred
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427,715rnn_CommonStockIssuanceCostIncurred
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524,775rnn_CommonStockIssuanceCostIncurred
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| Fair value |
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87,368rnn_InvestmentWarrantsFairValue
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110,489rnn_InvestmentWarrantsFairValue
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3,768,351rnn_InvestmentWarrantsFairValue
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5,034,058rnn_InvestmentWarrantsFairValue
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87,368rnn_InvestmentWarrantsFairValue
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110,489rnn_InvestmentWarrantsFairValue
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| Cash paid for warrants exercised |
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5,947,268rnn_CashPaidForWarrantsExercised
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2,209,667rnn_CashPaidForWarrantsExercised
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| Shares issued for warrants exercised |
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11,738,220rnn_SharesIssuedForWarrantsExercised
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4,681,497rnn_SharesIssuedForWarrantsExercised
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| Warrants issued per share of stock issued in unit offering |
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0.25rnn_WarrantsIssuedPerShareOfStockIssuedInUnitOffering
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0.35rnn_WarrantsIssuedPerShareOfStockIssuedInUnitOffering
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0.35rnn_WarrantsIssuedPerShareOfStockIssuedInUnitOffering
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| Warrants issued included in closing costs |
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407,692rnn_WarrantsIssuedIncludedInClosingCosts
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456,000rnn_WarrantsIssuedIncludedInClosingCosts
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| Stock Warrants, Exercise Price |
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$ 1.28rnn_StockWarrantsExercisePrice
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$ 0.575rnn_StockWarrantsExercisePrice
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$ 0.59rnn_StockWarrantsExercisePrice
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$ 0.575rnn_StockWarrantsExercisePrice
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$ 0.59rnn_StockWarrantsExercisePrice
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| Number of options exercised |
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125,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
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448,693us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
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375,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
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| Employee Stock Option [Member] |
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| Class of Stock [Line Items] |
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| Value of exercised of stock options |
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$ 258,955us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis
= us-gaap_EmployeeStockOptionMember
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