Condensed Consolidated Balance Sheets [Parenthetical] (USD $)	Sep. 30, 2011	Dec. 31, 2010
Allowance for doubtful accounts (in dollars)	$ 264,000	$ 161,000
Preferred stock,par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	12,546,000	12,491,000
Common stock, shares outstanding	12,055,000	11,242,000
Treasury shares	491,000	1,249,000