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Net Income Per Share (Tables)
 9 Months Ended
Sep. 30, 2012
Net Income Per Share [Abstract]  
Reconciliation of Numerator and Denominator in Income Per Share
A reconciliation of the numerators and denominators of the basic and diluted net income per share calculations is as follows (in thousands, except per share data):

 
Three Months Ended
 
 
Nine Months Ended
 
 
September 30,
 
 
September 30,
 
 
2012
 
 
2011
 
 
2012
 
 
2011
 
Numerator:
 
 
 
 
 
 
 
 
 
 
 
 
Net income attributable to AXT, Inc.
 
$
932
 
 
$
6,484
 
 
$
3,866
 
 
$
17,754
 
Less: Preferred stock dividends
 
 
(44
)
 
 
(44
)
 
 
(132
)
 
 
(132
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income available to common stockholders
 
$
888
 
 
$
6,440
 
 
$
3,734
 
 
$
17,622
 
Denominator:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Denominator for basic net income per share - weighted average common shares
 
 
32,183
 
 
 
31,944
 
 
 
32,118
 
 
 
31,832
 
Effect of dilutive securities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Common stock options
 
 
582
 
 
 
1,094
 
 
 
754
 
 
 
1,192
 
Restricted stock awards
 
 
4
 
 
 
88
 
 
 
39
 
 
 
116
 
Denominator for dilutive net income per common share
 
 
32,769
 
 
 
33,126
 
 
 
32,911
 
 
 
33,140
 
Net income attributable to AXT, Inc. per common share:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Basic
 
$
0.03
 
 
$
0.20
 
 
$
0.12
 
 
$
0.55
 
Diluted
 
$
0.03
 
 
$
0.19
 
 
$
0.11
 
 
$
0.53
 
Options excluded from diluted net income per share as the impact is anti-dilutive
 
 
992
 
 
 
407
 
 
 
977
 
 
 
403
 
Restricted stock excluded from diluted net income per share as the impact is anti-dilutive
 
 
172
 
 
 
163
 
 
 
14
 
 
 
163