Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2018

Operating Results of Reportable Segments

The following table summarizes the operating results of the Company’s reportable segments (in thousands):

	Three Months Ended March 31,
	2018			2017
Total segments
Revenues	$	14,053		$	11,584
Operating loss		(5,235	)		(8,544	)
Depreciation and amortization		1,039			934
Post-Transplant
Revenues-testing and license and other revenue	$	10,746		$	7,917
Operating loss		(3,195	)		(5,459	)
Depreciation and amortization		329			262
Pre-Transplant
Revenues- product revenue	$	3,307		$	3,667
Operating loss		(2,040	)		(3,085	)
Depreciation and amortization		710			672

	March 31, 2018		December 31, 2017
Assets:
Post-Transplant	$	45,564	$	48,734
Pre-Transplant		33,388		34,831
Total assets	$	78,952	$	83,565

Reportable Revenues by Geographic Regions

Revenues by geographic regions are based upon the customers’ ship-to address for pre-transplant revenues and the region of testing for post-transplant revenue. The following table summarizes reportable revenues by geographic regions (in thousands):

	Three Months Ended March 31, 2018				Three Months Ended March 31, 2017
	Post-Transplant		Pre-Transplant		Post-Transplant		Pre-Transplant
Revenues:
North America	$	10,729	$	929	$	7,902	$	1,000
Europe		17		1,973		15		2,059
Australia		—		74		—		116
Rest of the World		—		331		—		492
Total	$	10,746	$	3,307	$	7,917	$	3,667

Long-Lived Assets Consisting of Property and Equipment, Net by Geographic Regions

The following table summarizes long-lived assets, consisting of property and equipment, net, by geographic regions (in thousands):

	March 31, 2018		December 31, 2017
Long-lived assets:
North America	$	1,256	$	1,206
Europe		713		776
Australia		86		93
Total	$	2,055	$	2,075