Quarterly report pursuant to Section 13 or 15(d)

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)

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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Preferred stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Preferred stock, shares authorized 50,000,000 50,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, shares authorized 200,000,000 200,000,000
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares issued 65,893,977 60,883,184
Common stock, shares outstanding 65,893,977 60,883,184