CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue	$ 159,518	$ 114,249	$ 93,774
Operating expenses:
Research and development	63,691	64,410	60,376
Selling, general and administrative	81,288	67,015	66,205
Total operating expenses	144,979	131,425	126,581
Loss from operations	(48,936)	(58,333)	(66,226)
Non-operating expense, net:
Foreign exchange (loss) gain	(572)	793	(86)
Interest expense	(4,923)	(3,746)	(6,065)
Other income, net	374	1,713	1,396
Total non-operating expense, net	(5,121)	(1,240)	(4,755)
Loss before income taxes	(54,057)	(59,573)	(70,981)
Provision for income taxes	319	284	263
Net loss	(54,376)	(59,857)	(71,244)
Net loss attributable to noncontrolling interest	(2)
Net loss attributable to Cerus Corporation	$ (54,374)	$ (59,857)	$ (71,244)
Net loss per share attributable to Cerus Corporation
Basic and diluted	$ (0.32)	$ (0.37)	$ (0.51)
Weighted average shares outstanding:
Basic and diluted	171,279	163,949	139,831
Product
Revenue	$ 130,859	$ 91,920	$ 74,649
Cost of product revenue	63,475	41,157	33,419
Gross profit on product revenue	67,384	50,763	41,230
Government Contract
Revenue	$ 28,659	$ 22,329	$ 19,125