CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Accounts receivable, allowance for doubtful accounts	$ 903,961	$ 991,990
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	32,797,625	32,797,625
Common stock, shares outstanding	32,798,459	32,798,459