Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Allowances for trade accounts receivable current	$ 462	$ 447
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	44,513,000	24,913,000
Common stock, shares outstanding	44,513,000	24,913,000