Property and Equipment

12 Months Ended

Dec. 31, 2017

Property and Equipment [Abstract]

Property and Equipment

4. Property and Equipment

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

	As of December 31,
	2017			2016
Computers, software, furniture and fixtures	$	1,313		$	930
Equipment under capital lease		3,590			1,661
Less accumulated depreciation and amortization		(1,576	)		(560	)
Property and equipment, net	$	3,327		$	2,031

Depreciation and amortization expense was $953,000, $360,000 and $187,000 for the years ended December 31, 2017, 2016 and 2015, respectively.