Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Common stock, par value $ 0.0001 $ 0.0001
Common stock, shares authorized 375,000,000 375,000,000
Common stock, shares issued 38,778,289 23,405,785
Common stock, shares outstanding 35,724,655 20,352,151
Treasury stock, shares 3,053,634 0
Preferred stock, par value $ 0.0001 $ 0.0001
Preferred stock, shares authorized 1,000,000 1,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Series A-1
    
Redeemable preferred stock, par value $ 0.0001 $ 0.0001
Redeemable preferred stock, shares authorized 0 9,794,142
Redeemable preferred stock, shares issued 0 9,794,142
Redeemable preferred stock, shares outstanding 0 9,794,142
Series A-2
    
Redeemable preferred stock, par value $ 0.0001 $ 0.0001
Redeemable preferred stock, shares authorized 0 19,887,000
Redeemable preferred stock, shares issued 0 19,887,000
Redeemable preferred stock, shares outstanding 0 19,887,000
Series B-1
    
Redeemable preferred stock, par value $ 0.0001 $ 0.0001
Redeemable preferred stock, shares authorized 0 73,783,872
Redeemable preferred stock, shares issued 0 73,783,872
Redeemable preferred stock, shares outstanding 0 73,783,872
Series B-2
    
Redeemable preferred stock, par value $ 0.0001 $ 0.0001
Redeemable preferred stock, shares authorized 0 62,326,439
Redeemable preferred stock, shares issued 0 62,326,439
Redeemable preferred stock, shares outstanding 0 62,326,439
Series C-1
    
Redeemable preferred stock, par value $ 0.0001 $ 0.0001
Redeemable preferred stock, shares authorized 0 105,868,792
Redeemable preferred stock, shares issued 0 84,695,034
Redeemable preferred stock, shares outstanding 0 84,695,034
Series C-2
    
Redeemable preferred stock, par value $ 0.0001 $ 0.0001
Redeemable preferred stock, shares authorized 0 107,187,927
Redeemable preferred stock, shares issued 0 85,750,341
Redeemable preferred stock, shares outstanding 0 85,750,341
Common Stock Non-Voting
    
Common stock, par value $ 0.0001 $ 0.0001
Common stock, shares authorized 25,000,000 25,000,000
Common stock, shares issued 19,118,233 0
Common stock, shares outstanding 19,118,233 0