CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Cost of revenue	$ 17,582	$ 10,953	$ 44,000	$ 28,978
Gross profit	18,549	12,654	46,994	34,743
Operating expenses:
Research and development	15,288	15,921	48,119	47,349
Selling, general and administrative	20,357	16,299	59,285	48,324
Total operating expenses	35,645	32,220	107,404	95,673
Loss from operations	(11,126)	(13,982)	(41,974)	(43,992)
Non-operating expense, net:
Foreign exchange (loss) gain	(164)	490	(442)	540
Interest expense	(1,279)	(930)	(3,589)	(2,794)
Other income, net	205	351	998	962
Total non-operating expense, net	(1,238)	(89)	(3,033)	(1,292)
Loss before income taxes	(12,364)	(14,071)	(45,007)	(45,284)
Provision for income taxes	73	68	248	192
Net loss	(12,437)	(14,139)	(45,255)	(45,476)
Net loss attributable to Cerus Corporation	$ (12,437)	$ (14,139)	$ (45,255)	$ (45,476)
Net loss per share attributable to Cerus Corporation
Basic and diluted	$ (0.07)	$ (0.08)	$ (0.27)	$ (0.28)
Weighted average shares outstanding:
Basic and diluted	171,904	166,572	170,666	162,800
Product
Revenue	$ 36,131	$ 23,607	$ 90,994	$ 63,721
Government Contract
Revenue	$ 5,970	$ 5,584	$ 18,436	$ 16,938