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Property And Equipment
12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Property And Equipment
PROPERTY AND EQUIPMENT
Property and equipment consisted of the following (in thousands): 
 
December 31,
 
2014
 
2013
Laboratory equipment
$
13,677

 
$
15,453

Computer equipment and software
14,840

 
14,462

Furniture and fixtures
3,701

 
3,691

Leasehold improvements
16,364

 
17,031

Construction-in-progress
120

 
68

 
48,702

 
50,705

Less: accumulated depreciation and amortization
(46,270
)
 
(45,795
)
Property and equipment, net
$
2,432

 
$
4,910


For the years ended December 31, 2014, 2013 and 2012, we recorded depreciation expense of $2.3 million, $3.1 million and $4.8 million, respectively.
In 2014, 2013 and 2012, we recorded gross asset impairment charges in the amounts of $0.7 million, $0.1 million and $0.3 million, respectively, in connection with the Restructurings. The amount recorded as a restructuring charge for asset impairment, as presented in “Note 4 - Restructurings,” was net of the gain on the sale of such assets. In 2014 and 2012, the gain on the sale of excess equipment was $0.6 million and $0.3 million, respectively. There were no such gains in 2013. Cash proceeds on those sales were $0.4 million, $0.1 million and $0.9 million during 2014, 2013 and 2012, respectively.