Three Months Ended
June 30,

Six Months Ended
June 30,

2012

2011

2012

2011

Basic:

Net income (loss) attributable to common stockholders

$

2,534,269

$

(5,098,351

)

$

22,830,320

$

(14,117,662

)

Weighted average common shares outstanding

29,669,058

28,998,451

29,615,357

27,062,761

Basic earnings per common share

$

0.09

$

(0.18

)

$

0.77

$

(0.52

)

Diluted:

Effect of dilutive securities:

Net income (loss) attributable to common stockholders

$

2,534,269

$

(5,098,351

)

$

22,830,320

$

(14,117,662

)

Adjustments to Income for Dilutive options and warrants

—

2,534,269

(5,098,351

)

22,830,320

(14,117,662

)

Weighted average common shares outstanding

29,669,058

28,998,451

29,615,357

27,062,761

Effect of Dilutive options and warrants

1,476,918

0

532,729

0

Diluted weighted average common shares outstanding

31,145,976

28,998,451

30,148,086

27,062,761

Diluted earnings per common share

$

0.08

$

(0.18

)

$

0.76

$

(0.52

)