Consolidated Balance Sheets [Parenthetical] (USD $)	Dec. 31, 2012	Dec. 31, 2011
Allowance for accounts receivable (in dollars)	$ 35,700	$ 70,300
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares, issued	14,511,816	14,425,185
Common stock, shares, outstanding	12,619,640	12,484,104