CONDENSED BALANCE SHEETS [Parenthetical] (USD $)	Mar. 31, 2015	Dec. 31, 2014
Allowance for doubtful accounts	$ 74,557	$ 95,525
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 6,125,058	$ 5,788,551
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	6,043,191
Treasury stock, shares	668,130	668,130