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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) (USD $)
Dec. 31, 2008
Common Stock [Member]
Dec. 31, 2006
Series A-1
Dec. 31, 2010
Series A-2
Dec. 31, 2009
Series A-2
Dec. 31, 2012
Series A-3
Dec. 31, 2011
Series A-3
Share Price $ 0.15 $ 1.54 $ 1.83 $ 1.83 $ 1.93 $ 1.93