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Property and Equipment, Net
 12 Months Ended
Dec. 31, 2019
Property Plant And Equipment [Abstract]  
Property and Equipment, Net

6. Property and Equipment, Net

Property and equipment, net consists of the following:

 

 

 

 

 

 

 

 

 

December 31, 

 

    

2019

    

2018

Computer and office equipment

 

$

211

 

$

211

Laboratory equipment

 

 

628

 

 

628

Furniture and fixtures

 

 

61

 

 

47

Leasehold improvements

 

 

1,132

 

 

1,128

 

 

$

2,032

 

$

2,014

Less accumulated depreciation and amortization

 

 

1,332

 

 

1,134

Property and equipment, net

 

$

700

 

$

880

 

Depreciation and amortization expense included in R&D expense and General and administrative expense was $198,  $370 and $495 for the years ended December 31, 2019, 2018 and 2017, respectively.

During the year ended December 31, 2017, the Company wrote-off $7,816 of fully-depreciated Shelton property and equipment, including leasehold improvements, that was not re-located to the Stamford headquarters (see Note 17, Commitments and Contingencies). During the year ended December 31, 2017, the Company sold fully-depreciated Shelton property and equipment for net proceeds of $41.