Percentage of Revenue from Significant Customers (Detail) - Customer Concentration Risk - Sales Revenue	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
GE Healthcare
Revenue, Major Customer [Line Items]
Revenue from significant customers as a percentage of total revenue	26.00%	30.00%	38.00%	39.00%
Bioprocessing Customer B
Revenue, Major Customer [Line Items]
Revenue from significant customers as a percentage of total revenue	19.00%	23.00%	18.00%	22.00%
Bioprocessing Customer C
Revenue, Major Customer [Line Items]
Revenue from significant customers as a percentage of total revenue	19.00%	20.00%	14.00%	16.00%