The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Goodwill and Intangible Assets - Narrative (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		10 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Dec. 31, 2018	Dec. 10, 2018
Goodwill [Line Items]
Goodwill	$ 198,571		$ 198,571		$ 198,571	$ 197,892
Amortization of intangibles	2,400	$ 1,400	7,482	$ 4,255
Genoptix
Goodwill [Line Items]
Goodwill	$ 51,552		$ 51,552		51,552		$ 50,873
Measurement period adjustments, goodwill					$ 679