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Leasehold Improvements, Equipment and Construction in Progress, Net
6 Months Ended
Jun. 30, 2011
Leasehold Improvements, Equipment and Construction in Progress, Net [Abstract]  
Leasehold Improvements, Equipment and Construction in Progress, Net
6. Leasehold Improvements, Equipment and Construction in Progress, Net
A summary of leasehold improvements, equipment, and construction in progress and related accumulated depreciation and amortization is as follows:
                     
    Ranges of Estimated            
    useful life   June 30, 2011     December 31, 2010  
    (Unaudited)  
                 
Equipment
  2-10 years   $ 35,949     $ 30,982  
Leasehold improvements
  Shorter of lease term                
 
  or economic life up to                
 
  10 years     10,027       9,642  
Construction in progress
        2,100       6,025  
 
               
 
        48,076       46,649  
Less accumulated depreciation and amortization
        (31,373 )     (29,810 )
 
               
Leasehold improvements, equipment and construction in progress, net
      $ 16,703     $ 16,839  
 
               
Depreciation expense was $1,016 and $1,947 for the three and six months ended June 30, 2011, respectively, and $946 and $1,865 for the three and six months ended June 30, 2010, respectively. Depreciation includes gains on sale and abandonment of leasehold improvements and equipment of $47 and $36 for the three and six months ended June 30, 2011, respectively, and losses on the sale and abandonment of leasehold improvements and equipment of $19 and $37 for the three and six months ended June 30, 2010, respectively.