v2.4.1.9
Property and Equipment
12 Months Ended
Dec. 31, 2014
Property and Equipment [Abstract]  
Property, Plant and Equipment Disclosure [Text Block]
5.    PROPERTY AND EQUIPMENT
 
December 31,
 
2014
 
2013
Computer equipment and software
$
27,678

 
$
25,368

Engineering and test equipment
11,970

 
11,631

Building and improvements
11,076

 
7,902

Leasehold improvements
7,406

 
6,477

Furniture and fixtures
1,292

 
1,166

Land
695

 
695

Property and equipment, gross
60,117

 
53,239

Less: accumulated depreciation
(47,571
)
 
(43,704
)
Property and equipment, net
$
12,546

 
$
9,535


Depreciation expense was $3.9 million, $3.6 million and $3.6 million in 2014, 2013 and 2012, respectively. Depreciation expense included depreciation of computer software costs of $1.4 million, $1.0 million and $1.0 million in 2014, 2013 and 2012, respectively. Accumulated depreciation related to computer software costs was $14.3 million and $12.7 million at December 31, 2014 and 2013, respectively. The net book value of our computer software was $2.2 million and $2.5 million at December 31, 2014 and 2013, respectively.