Intangible Assets - Classes of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
COST	$ 2,982	$ 2,982
Accumulated Amortization	461	405
Total	2,521	2,577
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	126	112
Total	374	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	215	188
Total	1,267	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	120	105
Total	$ 880	$ 895