Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Allowance for doubtful accounts (in Dollars) (in Dollars)	$ 244	$ 289
Common stock, par value (in Dollars per share) (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in Shares)	20,000,000	20,000,000
Common stock, shares issued (in Shares)	8,376,592	8,117,849
Common stock, shares outstanding (in Shares)	6,874,992	6,724,280
Treasury stock, shares (in Shares)	1,501,600	1,393,569