BALANCE SHEETS [Parenthetical] (USD $)	Dec. 31, 2014	Dec. 31, 2013
Allowance for doubtful accounts	$ 95,525	$ 144,921
Preferred stock, par value (in dollars per share)	$ 0.005	$ 0.005
Preferred stock, shares authorized	872,521	872,521
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.005	$ 0.005
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	6,043,191	5,981,896
Treasury stock, shares	668,130	668,130
Common Stock, Shares, Outstanding	5,375,061	5,313,766