Property and Equipment, net (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment, Net [Abstract]

Property and equipment, net

Property and equipment comprised the following as of December 31, 2018 and 2017 (in thousands):

	December 31,
	2018			2017
Property and equipment–at cost:
Plant and machinery	$	15,206		$	13,762
Instruments	15,089			13,347
Office equipment	2,114			1,948
Leasehold improvements	10,648			10,480
Total property and equipment–at cost	43,057			39,537
Accumulated depreciation and amortization	(21,987		)	(16,956		)
Total property and equipment, net	$	21,070		$	22,581