Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts (in Dollars)	$ 289	$ 337
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	8,117,849	8,044,855
Common stock, shares outstanding	6,724,280	6,668,574
Treasury stock, shares	1,393,569	1,376,281