Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Balance Sheets [Abstract]
Accounts receivable, net allowance	$ 704,328	$ 667,529
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	56,372,466	55,431,573
Treasury stock, shares	40,151	40,151