Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2020

Revenue Recognition

Schedule of disaggregation of revenues by payer types

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Insurance carriers	$	300,220	$	210,919	$	193,895
Laboratory partners		58,196		59,876		44,062
Patients		32,589		31,533		19,697
Total revenues	$	391,005	$	302,328	$	257,654

Schedule of total revenue by geographic area

	Year ended December 31,
	2020		2019		2018
	(in thousands)
United States	$	365,660	$	260,846	$	225,931
Americas, excluding U.S.		3,469		3,218		3,472
Europe, Middle East, India, Africa		14,332		15,434		20,866
Asia Pacific and Other		7,544		22,830		7,385
Total	$	391,005	$	302,328	$	257,654

Schedule of beginning and ending balances of accounts receivable and deferred revenues

	Balance at		Balance at
	December 31,		December 31,
	2020		2019
	(in thousands)
Assets:
Accounts receivable	$	78,565	$	53,351
Liabilities:
Deferred revenue, current portion	$	50,125	$	56,016
Deferred revenue, long-term portion		22,805		23,808
Total deferred revenues	$	72,930	$	79,824

Schedule of changes in the balance of deferred revenues

	Deferred
	Revenues
	(in thousands)
Balance at December 31, 2019	$	79,824
Increase in deferred revenues		2,397
Reclasses from deferred revenues to other to short-term liabilities		(799)
Revenue recognized during the period that was included in deferred revenues at the beginning of the period		(7,246)
Revenue recognized from performance obligations satisfied within the same period		(1,246)
Balance at December 31, 2020	$	72,930

Schedule of insurance carrier reserve balance

	December 31,		December 31,
	2020		2019
	(in thousands)
Beginning balance	$	9,410	$	10,012
Additional reserves		19,427		9,560
Refunds to carriers		(6,066)		(7,752)
Reserves released to revenue		(5,405)		(2,410)
Ending balance	$	17,366	$	9,410