Segment, Customer and Geographic Information - Significant Customer that Accounted for More than Ten Percentage of Total Product Revenue (Detail) - Customer Concentration Risk - Sales Revenue, Goods, Net	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Etablissement Francais du Sang
Revenue, Major Customer [Line Items]
Concentration risk, percentage	25.00%	29.00%
American Red Cross
Revenue, Major Customer [Line Items]
Concentration risk, percentage	19.00%	13.00%