Condensed Consolidated Balance Sheets [Parenthetical] (USD $)	Sep. 30, 2012	Dec. 31, 2011
Allowance for doubtful accounts receivable (in dollars)	$ 754,000	$ 366,000	[1]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01	[1]
Preferred stock, shares authorized	5,000,000	5,000,000	[1]
Preferred stock, shares issued	0	0	[1]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	[1]
Common stock, shares authorized	50,000,000	50,000,000	[1]
Common stock, shares issued	12,663,000	12,546,000	[1]
Common stock, shares outstanding	12,075,000	12,055,000	[1]
Treasury stock, shares	588,000	491,000	[1]

[1] Derived from audited balance sheet as of December 31, 2011