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Per Share Data
 9 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Per Share Data
Per Share Data
The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share amounts): 
 
 
Three Months Ended
June 30,
 
Nine Months Ended
June 30,
 
 
2013
 
2012
 
2013
 
2012
Numerator for basic and diluted net income per share:
 
 
 
 
 
 
 
 
Net income attributable to ISSI
 
$
7,064

 
$
3,137

 
$
12,850

 
$
10,528

Denominator for basic net income per share:
 
 
 
 
 
 
 
 
Weighted average common shares outstanding
 
28,293

 
27,316

 
27,988

 
27,002

Dilutive stock options and awards
 
1,462

 
1,753

 
1,439

 
1,799

Denominator for diluted net income per share
 
29,755

 
29,069

 
29,427

 
28,801

Basic net income per share
 
$
0.25

 
$
0.11

 
$
0.46

 
$
0.39

Diluted net income per share
 
$
0.24

 
$
0.11

 
$
0.44

 
$
0.37


For the three months and nine months ended June 30, 2013, stock options and awards for 2,864,000 shares and 2,849,000 shares, respectively, were excluded from diluted earnings per share by the application of the treasury stock method. For the three months and nine months ended June 30, 2012, stock options and awards for 1,494,000 shares and 1,405,000 shares, respectively, were excluded from diluted earnings per share by the application of the treasury stock method.