Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Accumulated depreciation of furniture, fixtures and equipment	$ 2,262,421	$ 1,891,684
Accumulated amortization of intangible assets	$ 52,906,758	$ 48,892,725
Common stock, par value	$ 0.02	$ 0.02
Common stock, shares authorized	101,000,000	101,000,000
Common stock, shares issued	11,569,692	11,470,565
Common stock, shares outstanding	11,569,692	11,470,565