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Fair Value Measurement Schedule Of Carrying Value And Fair Value Of Financial Assets Disclosed (Details) - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash $ 18,823,257 $ 15,826,515
Cost-basis investments 0 0
Accrued dividends and interest 1,039,031 1,063,837
Total 19,862,288 16,890,352
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 2,972,786 2,675,817
Accrued dividends and interest 0 0
Total 2,972,786 2,675,817
Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 18,823,257 15,826,515
Cost-basis investments 2,574,394 2,516,608
Accrued dividends and interest 1,039,031 1,063,837
Total 22,436,682 19,406,960
Estimated Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 18,823,257 15,826,515
Cost-basis investments 2,972,786 2,675,817
Accrued dividends and interest 1,039,031 1,063,837
Total $ 22,835,074 $ 19,566,169