CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Amortization and depreciation	$ 363,040	$ 419,658	$ 1,100,968	$ 1,262,105
Share-based compensation expense	68,659	55,593	180,927	165,873
Non-cash gain on change in fair value of contingent obligation included in general and administrative expense	$ 661,000	$ 0	$ 1,250,000