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Funding Arrangement	12 Months Ended
Dec. 31, 2023
Funding Arrangement [Abstract]
Funding Arrangement	12. Funding Arrangement Our VAX-A1 vaccine development program currently is funded in part by a grant obtained from Combating Antibiotic Resistant Bacteria Biopharmaceutical Accelerator (“CARB-X”), a global non-profit partnership dedicated to accelerating antibacterial innovation to tackle the rising global threat of drug-resistant bacteria. The CARB-X grant provides for total potential funding of up to $14.6 million (including $11.7 million awarded to date since the grant’s inception in 2019) upon the achievement of VAX-A1 development milestones through June 2024. Our VAX-GI vaccine development program is currently funded in part by two grants obtained from the National Institutes of Health (“NIH”) administered by the University of Maryland, Baltimore. Our first grant from the NIH was awarded in April 2021 and provides for potential funding up to five years totaling approximately $0.5 million. In June 2023, we received another grant from the NIH that provides for potential funding up to five years totaling approximately $4.6 million. Income from grants is recognized in the period during which the related specified expenses are incurred, provided that the conditions under which the grants were provided have been met. We recognized $4.8 million, $1.9 million and $1.6 million of grant income and recorded the amounts in Other income (expense), net in the consolidated statements of operations during the years ended December 31, 2023, 2022, and 2021, respectively. A grant receivable of $0 and $1.0 million representing unreimbursed, eligible costs incurred under the CARB-X agreement was recorded and included in Prepaid expenses and other current assets in the consolidated balance sheets as of December 31, 2023 and 2022, respectively.

Funding Arrangement

12 Months Ended

Dec. 31, 2023

12. Funding Arrangement

Our VAX-A1 vaccine development program currently is funded in part by a grant obtained from Combating Antibiotic Resistant Bacteria Biopharmaceutical Accelerator (“CARB-X”), a global non-profit partnership dedicated to accelerating antibacterial innovation to tackle the rising global threat of drug-resistant bacteria. The CARB-X grant provides for total potential funding of up to $14.6 million (including $11.7 million awarded to date since the grant’s inception in 2019) upon the achievement of VAX-A1 development milestones through June 2024.

Our VAX-GI vaccine development program is currently funded in part by two grants obtained from the National Institutes of Health (“NIH”) administered by the University of Maryland, Baltimore. Our first grant from the NIH was awarded in April 2021 and provides for potential funding up to five years totaling approximately $0.5 million. In June 2023, we received another grant from the NIH that provides for potential funding up to five years totaling approximately $4.6 million.

Income from grants is recognized in the period during which the related specified expenses are incurred, provided that the conditions under which the grants were provided have been met. We recognized $4.8 million, $1.9 million and $1.6 million of grant income and recorded the amounts in Other income (expense), net in the consolidated statements of operations during the years ended December 31, 2023, 2022, and 2021, respectively. A grant receivable of $0 and $1.0 million representing unreimbursed, eligible costs incurred under the CARB-X agreement was recorded and included in Prepaid expenses and other current assets in the consolidated balance sheets as of December 31, 2023 and 2022, respectively.