Organization and Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Disaggregation of Revenue

The following table represents disaggregated revenue by source (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Revenue Source:
ePlex product revenue	7,092		1,167		19,014		2,074
XT-8 product revenue	7,775		11,124		16,429		22,687
Total product revenue	14,867		12,291		35,443		24,761
License and other revenue	74		68		143		133
Total revenue	$	14,941	$	12,359	$	35,586	$	24,894

Property, Plant and Equipment

Property, equipment and leasehold improvements are recorded at cost and depreciated using the straight-line method over the estimated useful lives of the assets, which are identified below. Repair and maintenance costs are expensed as incurred.

Machinery and laboratory equipment	3 - 5 years
Instruments	4 - 5 years
Office equipment	3 - 7 years
Leasehold improvements	over the shorter of the remaining life of the lease or the useful economic life of the asset

Property and Equipment, Net

	June 30, 2018			December 31, 2017
Property and equipment — at cost:
Machinery and laboratory equipment	$	14,040		$	13,762
Instruments	14,218			13,347
Office equipment	2,102			1,948
Leasehold improvements	10,500			10,480
Total property and equipment — at cost	40,860			39,537
Less: accumulated depreciation	(19,701		)	(16,956		)
Property and equipment, net	$	21,159		$	22,581