XML 27 R15.htm IDEA: XBRL DOCUMENT v3.8.0.1
Property and Equipment
12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment  
Property and Equipment
7.     Property and Equipment
 
Property and equipment consisted of the following at December 31, 2016 and 2017 (in thousands):
     
Lives in years
   
December 31,
 
     
2016
   
2017
 
Leasehold improvements
   
5 to 15 
      $ 792         $ 835    
Research and laboratory equipment
   
3 to 5 
        4,438           4,854    
Office equipment and furniture
   
3 to 5 
        1,157           1,236    
                6,387           6,925    
Less: accumulated depreciation and amortization
              (6,342)           (6,896)    
              45         29    
 
Depreciation and amortization expense for property and equipment was $0.1 million and $32,000 for the years ended December 31, 2016 and 2017, respectively. During the year ended December 31, 2016, the Company sold fully depreciated assets for proceeds of approximately $12,000. The Company did not sell any property or equipment during the year ended December 31, 2017.