CONDENSED BALANCE SHEETS [Parenthetical] (USD $)	Jun. 30, 2012	Dec. 31, 2011
Allowance for doubtful accounts (in dollars)	$ 126,570	$ 169,191
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	5,940,558	5,903,552
Treasury stock, shares	668,130	668,130