Goodwill and Intangible Assets - Classes of Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Cost	$ 88,912	$ 88,912
Accumulated Amortization	6,566	1,112
Total	$ 82,346	$ 87,800
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Period	24 months	24 months
Cost	$ 3,000	$ 3,000
Accumulated Amortization	1,133	8
Total	$ 1,867	$ 2,992
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Period	156 months	156 months
Cost	$ 82,930	$ 82,930
Accumulated Amortization	4,409	247
Total	$ 78,521	$ 82,683
Support Vector Machine (SVM) Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Period	108 months	108 months
Cost	$ 500	$ 500
Accumulated Amortization	255	213
Total	$ 245	$ 287
Laboratory Developed Test (LDT) Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Period	164 months	164 months
Cost	$ 1,482	$ 1,482
Accumulated Amortization	497	416
Total	$ 985	$ 1,066
Flow Cytometry and Cytogenetics Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Period	202 months	202 months
Cost	$ 1,000	$ 1,000
Accumulated Amortization	272	228
Total	$ 728	$ 772