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Investments In Securities Investments in Securities (Schedule of Carrying Value and Fair Value of Financial Assets Disclosed) (Details) - USD ($)
Jun. 30, 2016
Dec. 31, 2015
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash $ 22,619,643 $ 21,790,068
Cost-basis investments 0 0
Accrued dividends and interest 1,067,546 1,004,126
Total 23,687,189 22,794,194
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 0 0
Cost-basis investments 0 0
Accrued dividends and interest 0 0
Total 0 0
Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 0 0
Cost-basis investments 4,063,813 3,684,020
Accrued dividends and interest 0 0
Total 4,063,813 3,684,020
Reported Value Measurement [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 22,619,643 21,790,068
Cost-basis investments 3,514,919 3,588,314
Accrued dividends and interest 1,067,546 1,004,126
Total 27,202,108 26,382,508
Estimate of Fair Value Measurement [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 22,619,643 21,790,068
Cost-basis investments 4,063,813 3,684,020
Accrued dividends and interest 1,067,546 1,004,126
Total $ 27,751,002 $ 26,478,214