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Equipment and Leasehold Improvements
12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Equipment and Leasehold Improvements
(5)

 

Equipment and Leasehold Improvements

 

Equipment and leasehold improvements consist of the following:

 

   As of December 31, 
   2017   2016 
Machinery and equipment  $14,936   $14,587 
Office equipment   811    790 
Office furniture   110    110 
Leasehold improvements   4,839    4,814 
Construction in progress   157    75 
    20,853    20,376 
Less: Accumulated depreciation and amortization   (19,229)   (18,981)
   $1,624   $1,395 

 

Depreciation expense was $336 and $605, for the years ended December 31, 2017 and 2016, respectively.