Intangible Assets - Classes of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
COST	$ 4,842	$ 2,982
Accumulated Amortization	606	405
Total	4,236	2,577
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	156 months
COST	1,860
Accumulated Amortization	33
Total	1,827
Support Vector Machine (SVM) Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	108 months	108 months
COST	500	500
Accumulated Amortization	153	112
Total	347	388
Laboratory Developed Test (LDT) Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	164 months	164 months
COST	1,482	1,482
Accumulated Amortization	270	188
Total	1,212	1,294
Flow Cytometry and Cytogenetics Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	202 months	202 months
COST	1,000	1,000
Accumulated Amortization	150	105
Total	$ 850	$ 895