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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net loss	$ (7,718)	$ (9,690)
Other comprehensive loss
Foreign currency translation gain (loss) adjustment	3	(8)
Unrealized gains on available-for-sale investments, net of taxes	131	160
Comprehensive loss	(7,584)	(9,538)
Comprehensive loss attributable to noncontrolling interest	(1)	(2)
Total comprehensive loss attributable to Cerus Corporation	$ (7,583)	$ (9,536)

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