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Condensed Statement Of Cash Flows (USD $)
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12 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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| Cash Flows from Operating Activities: | ||
| Net loss | $ (18,521,601)us-gaap_NetIncomeLoss | $ (9,499,424)us-gaap_NetIncomeLoss |
| Adjustments to reconcile net loss to net cash used in operating activities: | ||
| Compensatory stock | 409,000us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims | 306,800us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims |
| Depreciation and amortization | 28,325us-gaap_DepreciationAndAmortization | 37,133us-gaap_DepreciationAndAmortization |
| Amortization of premiums and discounts on marketable securities | 10,228rnn_AmortizationOfPremiumsAndDiscountsOnMarketableSecurities | |
| Stock-based compensation | 608,795us-gaap_ShareBasedCompensation | 565,428us-gaap_ShareBasedCompensation |
| Amortization of deferred research and development arrangements | (233,630)rnn_AmortizationOfDeferredResearchAndDevelopmentContribution | (792,370)rnn_AmortizationOfDeferredResearchAndDevelopmentContribution |
| Unrealized loss on fair value of warrants | 5,180,107rnn_UnrealizedLossOnFairValueOfWarrants | 1,365,654rnn_UnrealizedLossOnFairValueOfWarrants |
| Financing expense | 206,172us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts | 204,212us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts |
| Amortization of deferred lease incentive | (12,443)rnn_AmortizationOfDeferredLeaseIncentive | (16,222)rnn_AmortizationOfDeferredLeaseIncentive |
| Deferred lease expenses | 7,834rnn_DeferredLeaseExpenses | 25,709rnn_DeferredLeaseExpenses |
| Changes in assets and liabilities: | ||
| Prepaid expenses and other assets | (249,503)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | (263,697)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets |
| Accounts payable and accrued expenses | 1,525,505us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | 81,921us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities |
| Net Cash Used in Operating Activities | (11,041,211)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | (7,984,856)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations |
| Cash Flows from Investing Activities: | ||
| Restricted cash equivalents | 196,130rnn_IncreaseDecreaseInRestrictedCashEquivalents | 895,671rnn_IncreaseDecreaseInRestrictedCashEquivalents |
| Purchase of equipment | (41,249)us-gaap_PaymentsToAcquireMachineryAndEquipment | (50,149)us-gaap_PaymentsToAcquireMachineryAndEquipment |
| Purchase of marketable securities | (26,075,926)us-gaap_PaymentsToAcquireMarketableSecurities | |
| Redemption of marketable securities | 3,260,000us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities | |
| Net Cash (Used In) Provided by Investing Activities | (22,661,045)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | 845,522us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations |
| Cash Flows from Financing Activities: | ||
| Issuance of common stock and units, net of issuance costs | 18,634,247us-gaap_ProceedsFromIssuanceOrSaleOfEquity | 10,041,155us-gaap_ProceedsFromIssuanceOrSaleOfEquity |
| Proceeds from exercise of stock options | 258,955us-gaap_ProceedsFromStockOptionsExercised | 90,000us-gaap_ProceedsFromStockOptionsExercised |
| Proceeds from exercise of stock warrants | 5,947,268us-gaap_ProceedsFromWarrantExercises | 2,209,667us-gaap_ProceedsFromWarrantExercises |
| Net Cash Provided by Financing Activities | 24,840,470us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | 12,340,822us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations |
| Net (Decrease) Increase in Cash and Cash Equivalents | (8,861,786)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 5,201,488us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease |
| Cash and Cash Equivalents - beginning of period | 18,688,031us-gaap_CashAndCashEquivalentsAtCarryingValue | 13,486,543us-gaap_CashAndCashEquivalentsAtCarryingValue |
| Cash and Cash Equivalents - end of period | 9,826,245us-gaap_CashAndCashEquivalentsAtCarryingValue | 18,688,031us-gaap_CashAndCashEquivalentsAtCarryingValue |
| Non-cash financing and investing activties: | ||
| Warrants issued | 3,691,429rnn_WarrantsIssued | 2,564,002rnn_WarrantsIssued |
| Warrant liability extinguishment from exercise of warrants | 10,137,243us-gaap_ConversionOfStockAmountConverted1 | 1,737,663us-gaap_ConversionOfStockAmountConverted1 |
| Shares withheld for net stock option exercise | 100,000rnn_SharesSurrendered | |
| Leasehold improvement incentive | $ 54,660rnn_LeaseholdImprovementIncentive | |
| X | ||||||||||
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- Definition
The total amount of amortization expense recognized during the period on a deferred lease incentive. The deferred lease incentive originated from a spending allowance for leasehold improvements and other fixed assets related to the building being leased. No definition available.
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| X | ||||||||||
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- Definition
Amount of previously reported deferred research and development contribution that was recognized as expense during the period. Generally, an entity records deferred research and development contribution when it receives consideration from a collaborator, and expenses the contribution over a period of time. No definition available.
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- Definition
Amortization Of Premiums And Discounts On Marketable Securities No definition available.
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- Definition
The amount of rent expense recognized during the reporting period using the straight line method. No definition available.
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- Definition
The net cash inflow (outflow) for the net change associated with funds that are not available for withdrawal or use and are associated with underlying transactions that are classified as operating activities. No definition available.
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| X | ||||||||||
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- Definition
The lessor agreed to grant a leasehold improvement allowance to the Company to be used for the construction cost of improvements to the leased property, which included architectural and engineering fees, government agency plan check, permit and other fees, sales and use taxes, testing and inspection costs, and telephone and data cabling and wiring in the premises. The Company accounts for the benefit of the leasehold improvement allowance as a reduction of rental expense over the five-year term of the office lease. No definition available.
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- Definition
Shares Surrendered No definition available.
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- Definition
The net change during the reporting period in the fair value of warrant liabilities. No definition available.
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- Definition
The fair value of common stock warrants issued during the period. No definition available.
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- Details
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- Definition
Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
The value of the stock converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Represents the charge against earnings during the period for commitment fees and debt issuance expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
The increase (decrease) during the reporting period in the value of prepaid expenses and other assets not separately disclosed in the statement of cash flows, for example, deferred expenses, intangible assets, or income taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value of share-based compensation granted to nonemployees as payment for services rendered or acknowledged claims. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash outflow for acquisition of machinery and equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Cash outflow for purchase of trading, available-for-sale securities and held-to-maturity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash inflow associated with the amount received from holders exercising their stock warrants. No definition available.
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- Definition
The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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