Investments in Securities and Fair Value Schedule of Carrying Value and Fair Value of Financial Assets (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Apr. 02, 2012	Dec. 31, 2011	Dec. 31, 2010
Financial Assets
Cash and cash equivalents, carrying value	$ 23,626,761	$ 20,810,018		$ 18,042,258	$ 8,117,031
Cost-basis investments, carrying value	1,927,429	1,871,315
Accrued dividends and interest, carrying value	1,006,698	1,037,447
Financial assets disclosed, carrying value	26,560,888	23,718,780
Cash and cash equivalents, estimated fair value	23,626,761	20,810,018
Cost-basis investments, estimated fair value	2,069,302	1,952,323
Accrued dividends and interest, estimated fair value	1,006,698	1,037,447
Financial assets disclosed, estimated fair value	26,702,761	23,799,788
Financial Liabilities
Contingent consideration, carrying value	341,250	691,250
Financial liabilities, carrying value	341,250	691,250
Contingent consideration, estimated fair value	341,250	691,250	691,250
Financial liabilities, estimated fair value	341,250	691,250
Level 1
Financial Assets
Cash and cash equivalents, estimated fair value	23,626,761	20,810,018
Cost-basis investments, estimated fair value	0	0
Accrued dividends and interest, estimated fair value	1,006,698	1,037,447
Financial assets disclosed, estimated fair value	24,633,459	21,847,465
Financial Liabilities
Contingent consideration, estimated fair value	0	0
Financial liabilities, estimated fair value	0	0
Level 2
Financial Assets
Cash and cash equivalents, estimated fair value	0	0
Cost-basis investments, estimated fair value	0	0
Accrued dividends and interest, estimated fair value	0	0
Financial assets disclosed, estimated fair value	0	0
Financial Liabilities
Contingent consideration, estimated fair value	0	0
Financial liabilities, estimated fair value	0	0
Level 3
Financial Assets
Cash and cash equivalents, estimated fair value	0	0
Cost-basis investments, estimated fair value	2,069,302	1,952,323
Accrued dividends and interest, estimated fair value	0	0
Financial assets disclosed, estimated fair value	2,069,302	1,952,323
Financial Liabilities
Contingent consideration, estimated fair value	341,250	691,250
Financial liabilities, estimated fair value	$ 341,250	$ 691,250