Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Par value	$ 0.001	$ 0.001
Preferred Stock, Shares Authorized (shares)	10,000,000	0
Preferred Stock, Shares Issued (shares)	0	0
Outstanding	0	0
Par Value	$ 0.001	$ 0.001
Authorized	600,000,000	600,000,000
Issued	126,367,700	22,229,978
Common stock outstanding	126,367,700	22,229,978
Convertible Preferred Stock [Member]
Par value	$ 0.001	$ 0.001
Preferred Stock, Shares Authorized (shares)	0	11,354,473
Preferred Stock, Shares Issued (shares)	0	10,462,877
Outstanding	0	10,462,877
Preferred Stock, Liquidation Preference, Value	$ 0	$ 68,610