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	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Etablissement Francais du Sang
Revenue, Major Customer [Line Items]
Concentration risk, percentage	21.00%	27.00%	38.00%
American Red Cross
Revenue, Major Customer [Line Items]
Concentration risk, percentage	20.00%	14.00%