Marketable Securities (Schedule Of Cost And Fair Value By Contractual Maturity) (Details) (USD $)
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Dec. 31, 2014
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Marketable Securities [Abstract] | |
Less than 1 year, Cost Basis, Maturity | $ 17,023,001rnn_AvailableForSaleSecuritiesDebtMaturitiesRemainingFiscalYearAmortizedCostBasis |
Less than 1 year, Fair Value, Maturity | 17,010,586rnn_AvailableForSaleSecuritiesDebtMaturitiesRemainingFiscalYearFairValue |
1 to 5 years, Cost Basis, Maturity | 5,882,697rnn_AvailableForSaleSecuritiesDebtMaturitiesYearOneThroughFiveAmortizedCostBasis |
1 to 5 years, Fair Value, Maturity | 5,861,465rnn_AvailableForSaleSecuritiesDebtMaturitiesYearOneThroughFiveFairValue |
Total Marketable Securities, Cost Basis, Maturity | 22,905,698us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis |
Total Marketable Securities, Fair Value, Maturity | $ 22,872,051us-gaap_AvailableForSaleSecuritiesDebtSecurities |
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- Definition
Available-for-sale Securities, Debt Maturities, Remaining Fiscal Year, Amortized Cost Basis No definition available.
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- Definition
Available-for-sale Securities, Debt Maturities, Remaining Fiscal Year, Fair Value No definition available.
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- Definition
Available-for-sale Securities, Debt Maturities, Year One Through Five, Amortized Cost Basis No definition available.
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- Definition
Available-for-sale Securities, Debt Maturities, Year One Through Five, Fair Value No definition available.
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- Definition
This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of debt securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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