ACACIA RESEARCH CORP | 2012 | FY | 3

For the periods presented, net (income) loss attributable to noncontrolling interests in operating subsidiaries was comprised of the following (in thousands):
 
2012
 
2011
 
2010
Net income attributable to noncontrolling interests(1)
$
—

 
$
—

 
$
(3,191
)
Net loss (income) attributable to noncontrolling interests - Acacia IP Fund
164

 
(539
)
 
226

Total net loss (income) attributable to noncontrolling interests
$
164

 
$
(539
)
 
$
(2,965
)
_________________________________________ 
(1) Net income attributable to noncontrolling interests in operating subsidiary represents net inventor royalties distributable to noncontrolling interests in one of Acacia’s majority-owned operating subsidiaries.

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Depreciation and amortization is computed on a straight-line basis over the following estimated useful lives of the assets:
Furniture and fixtures
3 to 5 years
Computer hardware and software
3 to 5 years
Leasehold improvements
2 to 5 years (Lesser of lease term or useful life of improvement)

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The following table presents the weighted-average number of common shares outstanding used in the calculation of basic and diluted income per share:
 
 
2012
 
2011
 
2010
 
 
 
 
 
 
 
Weighted-average common shares outstanding - basic
 
47,251,061

 
39,743,433

 
32,306,322

Dilutive effect of equity-based incentive awards
 
809,586

 
1,514,864

 
2,775,289

Weighted-average common shares outstanding - diluted
 
48,060,647

 
41,258,297

 
35,081,611

 
 
 

 
 

 
 

Anti-dilutive equity-based incentive awards excluded from the computation of diluted income (loss) per share
 
522,552

 
77,760

 
14,768

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