Property and Equipment, Net

9 Months Ended

12 Months Ended

Sep. 30, 2019

Dec. 31, 2018

5. Property and Equipment, Net

Property and equipment consist of the following (in thousands):


	September 30,		December 31,
	2019		2018
Research equipment	$	9,746	$	7,787
Leasehold improvements		5,365		4,825
Computer equipment		441		167
Furniture and fixtures		94		70
Construction in progress		787		1,027
Property and equipment, gross		16,433		13,876
Less: accumulated depreciation and amortization		(4,402)		(2,469)
Property and equipment, net	$	12,031	$	11,407

Construction in progress at September 30, 2019 consists of the costs incurred for research equipment and for the build-out of additional lab and office space and at December 31, 2018 consists of the costs incurred for the build-out of a manufacturing suite at the Company’s headquarters in Beltsville, Maryland.

Depreciation and amortization expense was $788,000 and $1,933,000 for the three and nine months ended September 30, 2019, respectively, and $396,000 and $1,159,000 for the three and nine months ended September 30, 2018, respectively.

4. Property and Equipment, Net

Property and equipment consist of the following (in thousands):


	December 31,
	2018		2017
Research equipment	$	7,787	$	6,213
Leasehold improvements		4,825		564
Computer equipment		167		111
Furniture and fixtures		70		33
Construction in progress		1,027		3,892
Property and equipment, gross		13,876		10,813
Less: accumulated depreciation and amortization		(2,469)		(792)
Property and equipment, net	$	11,407	$	10,021

Construction in progress at December 31, 2018 consists of the costs incurred for research equipment.

Depreciation and amortization expense was $1.7 million and $582,000 for the years ended December 31, 2018 and 2017, respectively.