Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 1,998	$ 1,952
Senior preferred stock, par value	$ 0.001	$ 0.001
Senior preferred stock, shares authorized	1,980,000	1,980,000
Senior preferred stock, shares issued	0	0
Senior preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	7,179,610	7,130,365
Treasury stock at cost, common shares held	288,681	282,850