Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Allowance for doubtful accounts (in Dollars)	$ 256	$ 289
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	8,214,111	8,117,849
Common stock, shares outstanding	6,778,288	6,724,280
Treasury stock, shares	1,435,823	1,393,569