Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Statement of Financial Position [Abstract]
Common stock; par value	$ 0.001	$ 0.001
Common stock; shares authorized	75,000,000	75,000,000
Common stock; shares issued	59,233,000	58,495,000
Common stock; shares outstanding	59,233,000	58,495,000