Condensed Consolidated Balance Sheets (unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Allowance for trade accounts receivable (in Dollars)	$ 46	$ 36
Property and equipment, accumulated depreciation (in Dollars)	15,394	19,187
Acquired intangible assets, accumulated amortization (in Dollars)	$ 12,495	$ 9,988
Preferred stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	30,000,000	30,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	26,393,146	25,397,448
Common stock, shares outstanding	26,393,146	25,397,448