Fair Value Measurement (Schedule Of Carrying Value And Fair Value Of Financial Assets Disclosed) (Details) (USD $)	Sep. 30, 2012	Apr. 02, 2012	Dec. 31, 2011
Cash, Carrying Value	$ 19,982,759		$ 18,042,258
Cash, Estimated Fair Value	19,982,759		18,042,258
Cost-basis investment, Carrying Value	1,894,899		1,303,887
Cost-basis investment, Estimated Fair Value	2,224,253		1,688,262
Accrued dividends and interest, Carrying Value	919,443		1,108,156
Accrued dividends and interest, Estimated Fair Value	919,443		1,108,156
Total Financial Assets, Carrying Value	22,797,101		20,454,301
Total Financial Assets, Estimated Fair Value	23,126,455		20,838,676
Contingent consideration, Carrying Value	691,250
Contingent consideration, 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	19,982,759		18,042,258
Cost-basis investment, Estimated Fair Value	0		0
Accrued dividends and interest, Estimated Fair Value	919,443		1,108,156
Total Financial Assets, Estimated Fair Value	20,902,202		19,150,414
Contingent consideration, Estimated Fair Value	0
Total Financial Liabilities, Estimated Fair Value	0
Level 2 [Member]
Cash, Estimated Fair Value	0		0
Cost-basis investment, Estimated Fair Value	0		0
Accrued dividends and interest, Estimated Fair Value	0		0
Total Financial Assets, Estimated Fair Value	0		0
Contingent consideration, Estimated Fair Value	0
Total Financial Liabilities, Estimated Fair Value	0
Level 3 [Member]
Cash, Estimated Fair Value	0		0
Cost-basis investment, Carrying Value	2,224,253		1,688,262
Accrued dividends and interest, Estimated Fair Value	0		0
Total Financial Assets, Estimated Fair Value	2,224,253
Contingent consideration, Estimated Fair Value	691,250
Total Financial Liabilities, Estimated Fair Value	$ 691,250