Property and Equipment, Net

12 Months Ended

Dec. 31, 2019

Property Plant And Equipment [Abstract]

4. Property and Equipment, Net

Property and equipment, net consisted of the following (in thousands):

	December 31,
	2019			2018
Computer software and equipment	$	438		$	166
Office furniture and equipment		364			210
Leasehold improvements		1,636			863
Construction-in-progress		12			897
Manufacturing equipment		1,338			1,584
		3,788			3,720
Less: Accumulated depreciation and amortization		(1,515	)		(827	)
	$	2,273		$	2,893

Property and equipment additions during the year ended December 31, 2019 primarily related to leasehold improvements previously in construction-in-progress. Property and equipment additions during the year ended December 31, 2018, primarily related to leased manufacturing equipment which was fully paid by the Company, as well as construction-in-progress and leasehold improvements related to the expansion of Company’s leased office space (see Note 5). Depreciation and amortization expense was $0.8 million and $0.4 million for the years ended December 31, 2019 and 2018, respectively. During the year ended December 31, 2019, the Company wrote off $0.2 million of leased manufacturing equipment which the Company determined did not have any further use. During the year ended December 31, 2018, the Company recorded a loss of $0.2 million related to the write-off of laboratory equipment and certain leasehold improvements at its Watertown, Massachusetts laboratory facility.