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Fair Value Measurement (Schedule Of Carrying Value And Fair Value Of Financial Assets Disclosed) (Details) (USD $)
Jun. 30, 2012
Apr. 02, 2012
Dec. 31, 2011
Cash, Carrying Value $ 17,457,651   $ 18,042,258
Cash, Estimated Fair Value 17,457,651   18,042,258
Cost-basis investment, Carrying Value 1,714,073   1,303,887
Cost-basis investment, Estimated Fair Value 2,088,372   1,688,262
Accrued dividends and interest, Carrying Value 1,136,981   1,108,156
Accrued dividends and interest, Estimated Fair Value 1,136,981   1,108,156
Total Financial Assets, Carrying Value 20,308,705   20,454,301
Total Financial Assets, Estimated Fair Value 20,683,004   20,838,676
Contingent liability, Carrying Value 691,250    
Contingent liability, Estimated Fair Value 691,250 691,250  
Total Financial Liabilities, Carrying Value 691,250    
Total Financial Liabilities, Estimated Fair Value 691,250    
Level 1 [Member]
      
Cash, Estimated Fair Value 17,457,651   18,042,258
Accrued dividends and interest, Estimated Fair Value 1,136,981   1,108,156
Total Financial Assets, Estimated Fair Value 18,594,632   19,150,414
Level 2 [Member]
      
Cash, Estimated Fair Value        
Cost-basis investment, Estimated Fair Value        
Accrued dividends and interest, Estimated Fair Value        
Total Financial Assets, Estimated Fair Value        
Contingent liability, Estimated Fair Value       
Total Financial Liabilities, Estimated Fair Value       
Level 3 [Member]
      
Cost-basis investment, Carrying Value 1,714,073   1,303,887
Contingent liability, Estimated Fair Value 691,250    
Total Financial Liabilities, Estimated Fair Value $ 691,250