Significant Customers that Accounted for More than Ten Percentage of Total Product Revenue (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Movaco, S.A.
Revenue, Major Customer [Line Items]
Percentage of revenue derived from significant customer from Company's total product revenue	18.00%	19.00%	21.00%
Etablissement Francais du Sang
Revenue, Major Customer [Line Items]
Percentage of revenue derived from significant customer from Company's total product revenue	17.00%	20.00%	24.00%
Delrus Inc.
Revenue, Major Customer [Line Items]
Percentage of revenue derived from significant customer from Company's total product revenue		12.00%	12.00%