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Covid-19 (Details) - USD ($) $ in Thousands		1 Months Ended		3 Months Ended		9 Months Ended
	Apr. 16, 2020	Apr. 30, 2020	Mar. 31, 2020	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]
AVISE CTD test volume, percentage				4.00%		8.00%
Coronavirus, Aid, Relief, And Economic Securities (CARES) Act, deferred tax assets, valuation allowance			$ 100		$ 100
Coronavirus, Aid, Relief, And Economic Securities (CARES) Act, deferred tax assets, income tax benefit					$ 100
Coronavirus, Aid, Relief, and Economic Securities (CARES) Act, proceeds from loan	$ 2,900	$ 700
Revenues				$ 0		$ 700
One-time Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 300

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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