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Property and Equipment, net
 9 Months Ended
Sep. 30, 2018
Property and Equipment, net  
Property and Equipment, net

5.  Property and Equipment, net

 

Property and equipment, net consist of the following, in thousands of dollars:

 

 

 

 

 

 

 

 

 

    

September 30,

    

December 31,

 

 

2018

 

2017

 

 

(unaudited)

 

 

 

Lab equipment and furniture

 

$

8,957

 

$

8,331

Leasehold improvements

 

 

2,970

 

 

2,731

Software

 

 

2,157

 

 

2,004

Computer equipment

 

 

1,309

 

 

1,226

Construction-in-progress

 

 

2,367

 

 

178

 

 

 

17,760

 

 

14,470

Less accumulated depreciation and amortization

 

 

(10,830)

 

 

(9,346)

 

 

$

6,930

 

$

5,124

 

Construction-in-progress includes capitalized construction costs related to the build-to-suit lease of the Company’s new headquarters (see Note 14). No accumulated depreciation for this asset has been recorded as of September 30, 2018.

 

Depreciation and amortization expense on property and equipment was approximately $600,000 and $1.5 million for the three and nine months ended September 30, 2018, and approximately $300,000 and $900,000 for the three and nine months ended September 30, 2017, respectively.

 

No indicators of impairment were identified.