Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Allowance for doubtful accounts (in Dollars)	$ 1,533	$ 1,792
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares outstanding	26,964,339	26,822,518
Common stock, shares issued	27,945,438	27,803,617
Treasury stock, shares	981,099	981,099