Consolidated Balance Sheets Parentheticals (USD $)	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Allowance for doubtful accounts	$ 183,000	$ 124,000
Stockholders’ equity:
Common stock, par value	$ 0.05	$ 0.05
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	10,690,000	10,566,000
Common stock, shares outstanding	10,690,000	10,566,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0