BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011
BALANCE SHEETS
Trade receivables, allowance (in dollars)	$ 43,000	$ 51,000
INTANGIBLE ASSETS, accumulated amortization (in dollars)	$ 482,107	$ 427,454
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized	250,000	250,000
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 issued	1,998,475	1,984,587
Common stock, shares outstanding	1,998,475	1,984,587