Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Consolidated Balance Sheets [Abstract]
Accumulated depreciation of furniture, fixtures and equipment	$ 1,758,683	$ 1,828,199
Accumulated amortization of intangible assets	$ 26,409,134	$ 24,067,250
Common stock, par value	$ 0.02	$ 0.02
Common stock, shares authorized	101,000,000	101,000,000
Common stock, shares issued	10,907,579	10,782,643
Common stock, shares outstanding	10,907,579	10,782,643