Property and Equipment

12 Months Ended

Dec. 31, 2017

Property and Equipment

Property and Equipment

5. Property and Equipment

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

	December 31, 2017			December 31, 2016
Computer equipment	$	1,226		$	1,206
Software		2,004			1,807
Lab equipment and furniture		8,331			6,758
Leasehold improvements		2,731			2,642
Construction in progress		178			28
		14,470			12,441
Less accumulated depreciation and amortization		(9,346	)		(8,097	)
	$	5,124		$	4,344

Depreciation and amortization expense on property and equipment was approximately $1.2 million, $1.1 million, and $0.7 million for the years ended December 31, 2017, 2016 and 2015, respectively.