CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012
ASSETS
Property and equipment, net of accumulated depreciation	$ 2,378,590	$ 2,279,840
Intangible assets, net of accumulated amortization	$ 5,111,352	$ 4,848,756
Stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	130,000,000	130,000,000
Common stock, shares issued (in shares)	95,825,353	88,423,169
Common stock, shares outstanding (in shares)	95,775,353	88,373,169
Treasury stock, shares (in shares)	50,000	50,000