Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Accumulated depreciation of furniture, fixtures and equipment	$ 2,533,158	$ 2,449,985
Accumulated amortization of intangible assets	$ 40,116,778	$ 38,738,292
Common stock, par value	$ 0.02	$ 0.02
Common stock, shares authorized	101,000,000	101,000,000
Common stock, shares issued	11,316,326	11,256,405
Common stock, shares outstanding	11,316,326	11,256,405