Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Less: debt - current, Principal	$ (1,512)
Less: debt - current, Unamortized Discount	63
Less: debt-current	(1,449)
Debt - non-current, Principal	18,488	$ 10,000
Debt - non-current, Unamortized Discount	(81)	(128)
Debt-non-current	18,407	9,872	[1]
Cerus Term Loans
Debt Instrument [Line Items]
Total debt, Principal	20,000	10,000
Total debt, Unamortized amount	(144)	(128)
Total debt	$ 19,856	$ 9,872

[1] The financial information in this column was derived from audited consolidated financial statements included in the Company's 2014 Annual Report on Form 10-K.