Property and Equipment

12 Months Ended

Dec. 31, 2018

Property and Equipment

Property and Equipment

5. Property and Equipment

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

	December 31,		December 31,
	2018		2017
Lab equipment and furniture	$	8,995	$	8,331
Leasehold improvements		2,731		2,731
Software		2,181		2,004
Computer equipment		1,313		1,226
Construction-in-progress		94		178
		15,314		14,470
Lessaccumulated depreciation and amortization		(11,219)		(9,346)
	$	4,095	$	5,124

Depreciation and amortization expense on property and equipment was approximately $1.9 million,  $1.2 million, and $1.1 million for the years ended December 31, 2018, 2017 and 2016, respectively.

No indicators of impairment were identified.