Three Months Ended June 30,

Six Months Ended June 30,

2011

2012

2011

2012

(in thousands, except per share data)

Numerator (basic and diluted):

Net income

$

3,871

$

3,224

$

6,900

$

5,234

Less: accretion of redemption premium expense

(2,924

)

(778

)

(5,692

)

(2,301

)

Net income attributable to common stockholders for basic EPS

$

947

$

2,446

$

1,208

$

2,933

Add back: accretion of redemption premium related to dilutive redeemable preferred stock

—

(86

)

—

(260

)

Net income attributable to common stockholders for diluted EPS

$

947

$

2,360

$

1,208

$

2,673

Denominator (basic):

Weighted average common shares outstanding

1,535

14,268

1,534

7,907

Denominator (diluted):

Weighted average common shares outstanding

1,535

14,268

1,534

7,907

Dilutive stock options and awards outstanding

1,195

1,305

1,122

1,109

Weighted average common shares from stock warrants

2,854

2,793

2,854

2,626

Weighted average common shares from convertible preferred stock

10,866

5,983

10,866

9,041

Net weighted average common shares outstanding

16,450

24,349

16,376

20,683

Net income per share attributable to holders of common stock:

Basic

$

0.62

$

0.17

$

0.79

$

0.37

Diluted

$

0.06

$

0.10

$

0.07

$

0.13