Property and Equipment

6 Months Ended

Jun. 30, 2019

Property Plant And Equipment [Abstract]

Property and Equipment

4. Property and Equipment

Property and equipment as of June 30, 2019 and December 31, 2018 consisted of the following:

	June 30, 2019			December 31, 2018
Computers and purchased software	$	19,063		$	15,706
Leasehold improvements		1,506			1,340
Furniture and fixtures		1,970			1,949
Machinery and equipment		22,146			21,979
Land		3,091			3,091
Building		4,765			4,765
Building improvements		5,356			5,245
Trial systems at customers’ sites		6,779			7,116
		64,676			61,191
Less: Accumulated depreciation and amortization		(34,614	)		(31,312	)
	$	30,062		$	29,879

During the six months ended June 30, 2019 and 2018, the Company transferred trial systems into inventory from property and equipment with values of $(352) and $(13), respectively, net of transfers of trial systems to cost of revenue. In addition, the Company transferred $(322) and $201 of equipment (to) from inventory (from) into property and equipment during the six months ended June 30, 2019 and 2018, respectively.

Total depreciation and amortization expense was $2,489 and $2,366 for the three months ended June 30, 2019 and 2018, respectively, and $4,885 and $4,668 for the six months ended June 30, 2019 and 2018, respectively.