Note 4 - Property and Equipment, Net
 12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Disclosure [Text Block]

4.  Property and Equipment, Net


Property and equipment consist of the following (in thousands):


   

As of December 31,

 
   

2013

   

2012

 

Equipment and software

  $ 83,075     $ 65,937  

Buildings and improvements

    29,342       28,319  

Land

    5,600       5,600  

Furniture and fixtures

    2,681       2,518  

Leasehold improvements

    2,150       2,053  

Vehicles

    976       1,002  

Property and equipment, gross

    123,824       105,429  

Less: accumulated depreciation and amortization

    (58,987 )     (46,017 )

Property and equipment, net

  $ 64,837     $ 59,412  

Depreciation expense for the years ended December 31, 2013, 2012 and 2011 was $12.1 million, $9.3 million and $8.7 million, respectively.