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Condensed Balance Sheet (USD $)
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Mar. 31, 2015
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Dec. 31, 2014
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| Current Assets: | ||
| Cash and cash equivalents | $ 10,729,210us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 9,826,245us-gaap_CashAndCashEquivalentsAtCarryingValue |
| Marketable securities (note 3) | 18,655,821us-gaap_AvailableForSaleSecuritiesCurrent | 22,872,051us-gaap_AvailableForSaleSecuritiesCurrent |
| Prepaid expenses and other current assets (note 4) | 991,027us-gaap_PrepaidExpenseAndOtherAssetsCurrent | 730,987us-gaap_PrepaidExpenseAndOtherAssetsCurrent |
| Total Current Assets | 30,376,058us-gaap_AssetsCurrent | 33,429,283us-gaap_AssetsCurrent |
| Security Deposit | 25,681us-gaap_SecurityDeposit | 25,681us-gaap_SecurityDeposit |
| Equipment, Net (note 5) | 79,866us-gaap_PropertyPlantAndEquipmentNet | 78,096us-gaap_PropertyPlantAndEquipmentNet |
| Total Assets | 30,481,605us-gaap_Assets | 33,533,060us-gaap_Assets |
| Current Liabilities: | ||
| Accounts payable and accrued expenses (note 6) | 2,749,539us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent | 2,459,263us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent |
| Deferred Research and Development Arrangements (note 7) | 581,250rnn_DeferredResearchAndDevelopmentArrangement | 600,000rnn_DeferredResearchAndDevelopmentArrangement |
| Other Liabilities (note 8) | 120,199us-gaap_DeferredRentCreditNoncurrent | 124,955us-gaap_DeferredRentCreditNoncurrent |
| Warrant Liabilities (note 12) | 3,652,936rnn_WarrantLiabilities | 3,768,351rnn_WarrantLiabilities |
| Total Liabilities | 7,103,924us-gaap_Liabilities | 6,952,569us-gaap_Liabilities |
| Commitments and Contingencies (note 14) | ||
| Stockholders' Equity (note 10): | ||
| Preferred stock, par value $0.0001, 100,000,000 authorized shares, none issued and outstanding | ||
| Common stock, par value $0.0001, 500,000,000 authorized shares, 179,323,461 and 178,366,533 issued and 179,210,246 and 178,253,318 outstanding | 17,932us-gaap_CommonStockValue | 17,837us-gaap_CommonStockValue |
| Additional paid-in capital | 119,091,102us-gaap_AdditionalPaidInCapitalCommonStock | 118,057,019us-gaap_AdditionalPaidInCapitalCommonStock |
| Accumulated other comprehensive income (loss) | 1,076us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax | (33,647)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax |
| Accumulated deficit | (95,604,019)us-gaap_RetainedEarningsAccumulatedDeficit | (91,332,308)us-gaap_RetainedEarningsAccumulatedDeficit |
| Treasury stock, 14,205 shares, at cost | (128,410)us-gaap_TreasuryStockValue | (128,410)us-gaap_TreasuryStockValue |
| Total Stockholders' Equity | 23,377,681us-gaap_StockholdersEquity | 26,580,491us-gaap_StockholdersEquity |
| Total Liabilities and Stockholders' Equity | $ 30,481,605us-gaap_LiabilitiesAndStockholdersEquity | $ 33,533,060us-gaap_LiabilitiesAndStockholdersEquity |
| X | ||||||||||
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- Definition
The unexpensed portion of deferred research and development arrangement as of the balance sheet date. Deferred research and development arrangement is a liability related to a collaborative research agreement. Generally, an entity records deferred research and development arrangement when it receives consideration from a collaborator, and expenses the contribution over a period of time. No definition available.
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| X | ||||||||||
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- Definition
Fair values as of the balance sheet date of all liabilities resulting from warrants that meet the criteria of being accounted for as liability instruments due to a provision in the warrant agreement for net cash settlement in the event that there is a fundamental transaction (contractually defined as a merger, sale of substantially all assets, tender offer, or share exchange). No definition available.
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- Definition
Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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
Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
For a classified balance sheet, the cumulative difference between the rental income or payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense, by the lessor or lessee, respectively, more than one year after the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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