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Earnings per Share
 9 Months Ended
Sep. 25, 2016
Earnings Per Share [Abstract]  
Earnings per Share

(3) Earnings per share

Basic and diluted income per share are calculated using the weighted average number of shares outstanding for the period as follows:

 

 

For the 13 Weeks Ended

 

 

For the 39 Weeks Ended

 

 

 

September 25,

 

 

September 27,

 

 

September 25,

 

 

September 27,

 

 

 

2016

 

 

2015

 

 

2016

 

 

2015

 

Net income attributable to Potbelly Corporation

 

$

1,795

 

 

$

1,401

 

 

$

6,256

 

 

$

4,393

 

Weighted average common shares outstanding-basic

 

 

25,240,374

 

 

 

27,850,394

 

 

 

25,772,846

 

 

 

28,450,063

 

Plus: Effect of potential stock options exercise

 

 

533,249

 

 

 

471,579

 

 

 

514,257

 

 

 

630,043

 

Plus: Effect of potential warrant exercise

 

 

56,347

 

 

 

47,802

 

 

 

54,810

 

 

 

57,431

 

Weighted average common shares outstanding-diluted

 

 

25,829,970

 

 

 

28,369,775

 

 

 

26,341,913

 

 

 

29,137,537

 

Income per share available to common stockholders-basic

 

$

0.07

 

 

$

0.05

 

 

$

0.24

 

 

$

0.15

 

Income per share available to common stockholders-diluted

 

$

0.07

 

 

$

0.05

 

 

$

0.24

 

 

$

0.15

 

Potentially dilutive shares that are considered anti-dilutive:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Common share options

 

 

1,233,294

 

 

 

1,192,579

 

 

 

1,236,599

 

 

 

803,582

 

Warrants

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—