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Property and Equipment
12 Months Ended
Dec. 31, 2011
Property and Equipment [Abstract]  
Property, Plant and Equipment Disclosure [Text Block]
Property and Equipment

Property and equipment consists of the following:
 
December 31, 2011
 
December 31, 2010
Radio and communications equipment
$
17,575

 
$
9,565

Office computers, equipment and software
13,842

 
6,186

Leasehold improvements, building and land
13,580

 
2,849

Capitalized lease assets

 
404

Property and equipment
44,997

 
19,004

Accumulated depreciation
(16,519
)
 
(11,711
)
Property and equipment, net
$
28,478

 
$
7,293


For the years ended December 31, 2011 and 2010, we recorded depreciation expense associated with property and equipment of $5,214 and $5,105, respectively. This includes depreciation on capitalized lease assets of $19 and $80 for the years ended December 31, 2011 and 2010, respectively.