CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net loss	$ (9,690)	$ (15,641)
Other comprehensive (loss) income
Foreign currency translation adjustment	(8)
Unrealized gains on available-for-sale investments, net of taxes	160	546
Comprehensive loss	(9,538)	(15,095)
Comprehensive loss attributable to noncontrolling interest	(2)	(22)
Total comprehensive loss attributable to Cerus Corporation	$ (9,536)	$ (15,073)