CONDENSED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
CONDENSED BALANCE SHEETS
Trade receivables, allowance (in dollars)	$ 49,000	$ 62,000
INTANGIBLE ASSETS, accumulated amortization (in dollars)	$ 186,030	$ 173,143
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized	250,000	250,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	4,750,000	4,750,000
Common stock, shares outstanding	2,018,086	2,012,170