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Stock-Based Compensation (Summary Of Stock Compensation Expense) (Details) (USD $)
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3 Months Ended | |
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Mar. 31, 2015
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Mar. 31, 2014
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||
| Share Based Compensation | $ 272,386us-gaap_AllocatedShareBasedCompensationExpense | $ 128,350us-gaap_AllocatedShareBasedCompensationExpense |
| General and administrative [Member] | ||
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||
| Share Based Compensation |
190,039us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = rnn_GeneralAndAdministrativePayrollMember |
80,911us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = rnn_GeneralAndAdministrativePayrollMember |
| Research and development [Member] | ||
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||
| Share Based Compensation |
$ 82,347us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = rnn_ResearchAndDevelopmentConsultingAndOtherProfessionalFeesMember |
$ 47,439us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = rnn_ResearchAndDevelopmentConsultingAndOtherProfessionalFeesMember |
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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