Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Allowances for accounts receivable
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized Series A	10,000	10,000
Preferred stock, shares designated	3,100	3,100
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	300,000	300,000
Common stock, shares issued	114,485	94,517
Common stock, shares outstanding	114,485	94,517