CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (20,961)	$ (37,647)	$ (42,825)
Other comprehensive loss
Foreign currency translation adjustment	(14)	(85)
Unrealized gains (losses) on available-for-sale investments, net of taxes	888	1,598	(2,638)
Comprehensive loss	(20,087)	(36,134)	(45,463)
Comprehensive loss attributable to noncontrolling interest	(43)	(158)	(46)
Total comprehensive loss attributable to Cerus Corporation	$ (20,044)	$ (35,976)	$ (45,417)