Percentage of Revenue from Significant Customers (Detail) - Customer Concentration Risk - Sales Revenue	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
GE Healthcare
Revenue, Major Customer [Line Items]
Revenue from significant customers as a percentage of total revenue	51.00%	48.00%	44.00%	44.00%
Bioprocessing Customer B
Revenue, Major Customer [Line Items]
Revenue from significant customers as a percentage of total revenue	16.00%	22.00%	19.00%	22.00%
Bioprocessing Customer C
Revenue, Major Customer [Line Items]
Revenue from significant customers as a percentage of total revenue	9.00%	14.00%	12.00%	14.00%