Entity Central Index Key
Cover [Abstract]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Ex Transition Period
Entity Ex Transition Period
Entity File Number
Entity File Number
Entity Tax Identification Number
Entity Tax Identification Number
Entity Address, Address Line One
Entity Address Address Line1
Entity Address, City or Town
Entity Address City Or Town
Entity Address, State or Province
Entity Address State Or Province
Entity Address, Postal Zip Code
Entity Address Postal Zip Code
City Area Code
City Area Code
Local Phone Number
Local Phone Number
Document Quarterly Report
Document Quarterly Report
Document Transition Report
Document Transition Report
Entity Small Business
Entity Small Business
Entity Shell Company
Entity Shell Company
Entity Common Stock, Shares Outstanding
Entity Common Stock Shares Outstanding
Entity Filer Category
Entity Filer Category
Entity Interactive Data Current
Entity Interactive Data Current
Entity Current Reporting Status
Entity Current Reporting Status
Title of 12(b) Security
Security12b Title
Trading Symbol
Trading Symbol
Security Exchange Name
Security Exchange Name
Accrued manufacturing expenses.
Redeemable convertible preferred stock warrant liability.
Statement Of Financial Position [Abstract]
Statement [Table]
Statement [Table]
Class of Stock
Statement Class Of Stock [Axis]
Class of Stock
Class Of Stock [Domain]
Series A redeemable convertible preferred stock.
Series A Redeemable Convertible Preferred Stock
Series A Redeemable Convertible Preferred Stock [Member]
Series B redeemable convertible preferred stock.
Series B Redeemable Convertible Preferred Stock
Series B Redeemable Convertible Preferred Stock [Member]
Series C redeemable convertible preferred stock.
Series C Redeemable Convertible Preferred Stock
Series C Redeemable Convertible Preferred Stock [Member]
Statement [Line Items]
Statement [Line Items]
Assets
Assets [Abstract]
Current assets:
Assets Current [Abstract]
Cash and cash equivalents
Cash And Cash Equivalents At Carrying Value
Prepaid expenses and other current assets
Prepaid Expense And Other Assets Current
Total current assets
Assets Current
Property and equipment, net
Property Plant And Equipment Net
Other assets
Other Assets Noncurrent
Total assets
Assets
Liabilities, Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit)
Liabilities And Stockholders Equity [Abstract]
Current liabilities:
Liabilities Current [Abstract]
Accounts payable
Accounts Payable Current
Accrued compensation
Employee Related Liabilities Current
Accrued manufacturing expenses
Accrued Manufacturing Expenses
Accrued expenses (including related party accrual of $134 and $15 as of September 30, 2020 and December 31, 2019, respectively)
Accrued Liabilities Current
Deferred rent — current portion
Deferred Rent Credit Current
Lease liability — current portion
Operating Lease Liability Current
Total current liabilities
Liabilities Current
Deferred rent — long-term portion
Deferred Rent Credit Noncurrent
Redeemable convertible preferred stock warrant liability
Redeemable Convertible Preferred Stock Warrant Liability
Other liabilities
Other Liabilities Noncurrent
Total liabilities
Liabilities
Commitments and contingencies (Note 5)
Commitments And Contingencies
Redeemable Convertible Preferred Stock
Temporary Equity [Abstract]
Redeemable convertible preferred stock value
Temporary Equity Carrying Amount Attributable To Parent
Stockholders' Equity (Deficit)
Stockholders Equity [Abstract]
Preferred stock, $0.001 par value — 10,000,000 and no shares authorized at September 30, 2020 and December 31, 2019, respectively; no shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively
Preferred Stock Value
Common stock, $0.001 par value — 500,000,000 and 52,000,000 shares authorized at September 30, 2020 and December 31, 2019, respectively; 50,949,490 and 4,059,909 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively
Common Stock Value
Additional paid-in capital
Additional Paid In Capital Common Stock
Accumulated deficit
Retained Earnings Accumulated Deficit
Total stockholders' equity (deficit)
Stockholders Equity
Total liabilities, redeemable convertible preferred stock and stockholders' equity (deficit)
Liabilities And Stockholders Equity
Related party accrual
Due To Related Parties Current
Redeemable convertible preferred stock, par value
Temporary Equity Par Or Stated Value Per Share
Redeemable convertible preferred stock, shares authorized
Temporary Equity Shares Authorized
Redeemable convertible preferred stock, shares issued
Temporary Equity Shares Issued
Redeemable convertible preferred stock, shares outstanding
Temporary Equity Shares Outstanding
Redeemable convertible preferred stock, liquidation value
Temporary Equity Liquidation Preference
Preferred stock, par value
Preferred Stock Par Or Stated Value Per Share
Preferred stock, shares authorized
Preferred Stock Shares Authorized
Preferred stock, shares issued
Preferred Stock Shares Issued
Preferred stock, shares outstanding
Preferred Stock Shares Outstanding
Common stock, par value
Common Stock Par Or Stated Value Per Share
Common stock, shares authorized
Common Stock Shares Authorized
Common stock, shares issued
Common Stock Shares Issued
Common stock, shares outstanding
Common Stock Shares Outstanding
Grant income.
Change in fair value of the redeemable convertible preferred stock tranche liability.
Income Statement [Abstract]
Operating expenses:
Operating Expenses [Abstract]
Research and development (including related party expenses of $143 and $1,011 for the three months ended September 30, 2020 and 2019, respectively, and $458 and $1,123 for the nine months ended September 30, 2020 and 2019, respectively)
Research And Development Expense
General and administrative
General And Administrative Expense
Total operating expenses
Operating Expenses
Loss from operations
Operating Income Loss
Other income (expense), net:
Other Nonoperating Income Expense [Abstract]
Interest expense
Interest Expense
Interest income
Investment Income Interest
Grant income
Grant Income
Foreign currency transaction losses
Foreign Currency Transaction Gain Loss Before Tax
Change in fair value of the redeemable convertible preferred stock tranche liability
Change In Fair Value Of Redeemable Convertible Preferred Stock
Total other income (expense), net
Other Nonoperating Income Expense
Net loss and comprehensive loss
Net Income Loss
Net loss per share, basic and diluted
Earnings Per Share Basic And Diluted
Weighted-average shares outstanding, basic and diluted
Weighted Average Number Of Share Outstanding Basic And Diluted
Research and development expense to related party.
Research and development expense to related party
Research And Development Expense To Related Party
Stock issued during period shares issuance of common stock related to early exercised stock options.
Adjustments to additional paid In capital vesting of early exercised stock options.
Temporary equity stock issued during period shares new issues.
Temporary equity conversion of preferred stock shares.
Temporary equity conversion of preferred stock value.
Stock issued during period shares conversion of common stock warrant.
Stock issued during period shares conversion of preferred stock warrant.
Adjustments to additional paid in capital warrant liability write off.
Statement Of Stockholders Equity [Abstract]
Equity Components
Statement Equity Components [Axis]
Equity Component
Equity Component [Domain]
Common Stock
Common Stock [Member]
Additional Paid-in Capital
Additional Paid In Capital [Member]
Accumulated Deficit
Retained Earnings [Member]
Series D redeemable convertible preferred stock.
Series D Redeemable Convertible Preferred Stock
Series D Redeemable Convertible Preferred Stock [Member]
Beginning balance
Beginning balance, shares
Beginning balance
Beginning balance, shares
Shares Outstanding
Conversion of preferred stock
Temporary Equity Conversion Of Preferred Stock Value
Conversion of preferred stock (in shares)
Temporary Equity Conversion Of Preferred Stock Shares
Conversion of preferred stock (in shares)
Stock Issued During Period Shares Conversion Of Convertible Securities
Conversion of common stock warrant
Stock Issued During Period Shares Conversion Of Common Stock Warrant
Conversion of preferred stock warrant
Stock Issued During Period Shares Conversion Of Preferred Stock Warrant
Warrant liability write-off
Adjustments To Additional Paid In Capital Warrant Liability Write Off
Issuance of common stock upon initial public offering, net of issuance costs of $3,296
Stock Issued During Period Value New Issues
Issuance of common stock upon initial public offering, net of issuance cost (in shares)
Stock Issued During Period Shares New Issues
Exercise of stock options
Stock Issued During Period Value Stock Options Exercised
Exercise of stock options (in shares)
Stock Issued During Period Shares Stock Options Exercised
Issuance of common stock related to early exercised stock options
Stock Issued During Period Shares Issuance Of Common Stock Related To Early Exercised Stock Options
Vesting of early exercised stock options
Adjustments To Additional Paid In Capital Vesting Of Early Exercised Stock Options
Issuance of preferred stock
Temporary Equity Stock Issued During Period Value New Issues
Issuance of preferred stock, net of issuance cost (in shares)
Temporary Equity Stock Issued During Period Shares New Issues
Issuance costs for initial public offering
Adjustments To Additional Paid In Capital Stock Issued Issuance Costs
Stock-based compensation expense
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
Net loss
Ending balance
Ending balance, shares
Ending balance
Ending balance, shares
Temporary equity stock issuance costs.
Temporary equity, Issuance costs
Temporary Equity Stock Issuance Costs
Issuance costs
Change in fair value of redeemable convertible preferred stock tranche liabilities.
Increase decrease in accrued compensation.
Increase decrease in accrued manufacturing expenses.
Increase decrease in deferred rent and other long term liabilities.
Payments of capital lease obligations.
Proceeds from initial public offering, net of underwriters' commissions and discounts.
Proceeds from issuance of common stock related to early exercised stock options.
Issuance costs for initial public offering included in accounts payable and accrued expenses.
Statement Of Cash Flows [Abstract]
Cash flows from operating activities:
Net Cash Provided By Used In Operating Activities [Abstract]
Net loss
Profit Loss
Adjustments to reconcile net loss to net cash used in operating activities:
Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]
Depreciation and amortization
Depreciation Depletion And Amortization
Stock-based compensation expense
Share Based Compensation
Change in fair value of redeemable convertible preferred stock warrant
Fair Value Adjustment Of Warrants
Change in fair value of redeemable convertible preferred stock tranche liabilities
Change In Fair Value Of Redeemable Convertible Preferred Stock Tranche Liabilities
Loss on disposal of assets
Gain Loss On Disposition Of Assets1
Asset impairment charges
Asset Impairment Charges
Changes in operating assets and liabilities:
Increase Decrease In Operating Liabilities [Abstract]
Prepaid expenses and other current assets
Increase Decrease In Prepaid Deferred Expense And Other Assets
Other assets
Increase Decrease In Other Operating Assets
Accounts payable
Increase Decrease In Accounts Payable
Accrued compensation
Increase Decrease In Accrued Compensation
Accrued manufacturing expenses
Increase Decrease In Accrued Manufacturing Expenses
Accrued expenses
Increase Decrease In Accrued Liabilities
Deferred rent and other long-term liabilities
Increase Decrease In Deferred Rent And Other Long Term Liabilities
Net cash used in operating activities
Net Cash Provided By Used In Operating Activities
Cash flows from investing activities:
Net Cash Provided By Used In Investing Activities [Abstract]
Purchases of property and equipment
Payments To Acquire Property Plant And Equipment
Proceeds from sale of property and equipment
Proceeds From Sale Of Property Plant And Equipment
Net cash used in investing activities
Net Cash Provided By Used In Investing Activities
Cash flows from financing activities:
Net Cash Provided By Used In Financing Activities [Abstract]
Payments of capital lease obligations
Payments Of Capital Lease Obligations
Proceeds from initial public offering, net of underwriters' commissions and discounts
Proceeds From Initial Public Offering Net Of Underwriters Commissions And Discounts
Payment of issuance costs for initial public offering
Payments Of Stock Issuance Costs
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs
Proceeds From Issuance Of Redeemable Convertible Preferred Stock
Proceeds from exercise of common stock options
Proceeds From Stock Options Exercised
Proceeds from issuance of common stock related to early exercised stock options
Proceeds From Issuance Of Common Stock Related To Early Exercised Stock Options
Net cash provided by (used in) financing activities
Net Cash Provided By Used In Financing Activities
Net increase (decrease) in cash and cash equivalents
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
Cash and cash equivalents, beginning of period
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
Cash and cash equivalents, end of period
Supplemental disclosure of cash flow information:
Supplemental Cash Flow Information [Abstract]
Cash paid for interest
Interest Paid Net
Supplemental disclosures of non-cash investing and financing activities:
Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract]
Purchases of property and equipment recorded in accounts payable and accrued expenses
Capital Expenditures Incurred But Not Yet Paid
Conversion of convertible preferred stock into common stock
Conversion Of Stock Amount Converted1
Issuance costs for initial public offering included in accounts payable and accrued expenses
Issuance Costs For Initial Public Offering Included In Accounts Payable And Accrued Expenses
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Company Organization and Nature of Business
Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block]
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies
Basis Of Presentation And Significant Accounting Policies [Text Block]
Fair Value Disclosures [Abstract]
Fair Value Measurements and Fair Value of Financial Instruments
Fair Value Disclosures [Text Block]
Balance Sheet Details
Supplemental Balance Sheet Disclosures [Text Block]
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies
Commitments And Contingencies Disclosure [Text Block]
Redeemable convertible preferred stock.
Temporary Equity Disclosure [Abstract]
Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Stock [Text Block]
Equity [Abstract]
Common Stock
Stockholders Equity Note Disclosure [Text Block]
Warrants.
Warrants
Warrants Disclosure [Text Block]
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity Incentive Plans
Disclosure Of Compensation Related Costs Share Based Payments [Text Block]
Funding arrangement.
Funding arrangement.
Funding Arrangement [Abstract]
Funding Arrangement
Funding Arrangement [Text Block]
Earnings Per Share [Abstract]
Net Loss Per Share
Earnings Per Share [Text Block]
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Related Party Transactions [Abstract]
Related Party Transactions
Related Party Transactions Disclosure [Text Block]
Basis of Presentation
Basis Of Accounting Policy Policy [Text Block]
Unaudited interim condensed financial statements policy.
Unaudited Interim Condensed Financial Statements
Unaudited Interim Condensed Financial Statements Policy Policy [Text Block]
Use of Estimates
Use Of Estimates
Net Loss Per Share
Earnings Per Share Policy [Text Block]
Deferred Offering Costs
Deferred Charges Policy [Text Block]
Concentration of Credit Risk and Other Risks and Uncertainties
Concentration Risk Credit Risk
Recently Issued Accounting Pronouncements Adopted And Not Yet Adopted
New Accounting Pronouncements Policy Policy [Text Block]
Schedule of Inputs Used for Level 3 Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques Table [Text Block]
Schedule of Financial Instruments Measured at Fair Value on Recurring Basis
Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block]
Summary of Changes in Estimated Fair Value of Level 3 Financial Instruments
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Text Block]
Schedule of Property and Equipment, Net
Property Plant And Equipment [Text Block]
Schedule of Accrued Expenses
Schedule Of Accrued Liabilities Table [Text Block]
Schedule of Future Minimum Payments under Operating Leases
Lessee Operating Lease Liability Maturity Table [Text Block]
Summary of Convertible Preferred Stock
Temporary Equity Table [Text Block]
Schedule of common stock shares reserved for future issuance.
Schedule of Common Stock Shares Reserved for Future Issuance
Schedule Of Common Stock Shares Reserved For Future Issuance Table [Text Block]
Summary of Warrants Issued and Outstanding
Schedule Of Stockholders Equity Note Warrants Or Rights [Text Block]
Plan Name
Plan Name [Axis]
Plan Name
Plan Name [Domain]
Two thousand twenty equity incentive plan and two thousand fourteen equity incentive plan.
2020 Plan and 2014 Plan
Two Thousand Twenty Equity Incentive Plan And Two Thousand Fourteen Equity Incentive Plan [Member]
Two thousand twenty employee stock purchase plan.
2020 Employee Stock Purchase Plan
Two Thousand Twenty Employee Stock Purchase Plan [Member]
Two thousand fourteen equity incentive plan and two thousand twenty equity incentive plan and two thousand twenty employee stock purchase plan.
2014 Plan, 2020 Plan and 2020 ESPP
Two Thousand Fourteen Equity Incentive Plan And Two Thousand Twenty Equity Incentive Plan And Two Thousand Twenty Employee Stock Purchase Plan [Member]
Summary of Activity Under Stock Option Plans
Schedule Of Share Based Compensation Stock Options Activity Table [Text Block]
Summary of Estimated Fair Value of Employee Stock Options
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table [Text Block]
Summary of Estimated Fair Value of Shares Under Employee Stock Purchase Plan
Schedule Of Share Based Payment Award Employee Stock Purchase Plan Valuation Assumptions Table [Text Block]
Summary of Stock-based Compensation Expense
Schedule Of Compensation Cost For Share Based Payment Arrangements Allocation Of Share Based Compensation Costs By Plan Table [Text Block]
Schedule of Computation of Basic and Diluted Net Loss Per Share
Schedule Of Earnings Per Share Basic And Diluted Table [Text Block]
Schedule of Potentially Dilutive Securities Excluded From Computation of Diluted Net Loss Per Share
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block]
Global target revenue.
Schedule of organization consolidation and presentation of financial statements.
Schedule of organization consolidation and presentation of financial statements.
Schedule Of Organization Consolidation And Presentation Of Financial Statements [Table]
Schedule Of Organization Consolidation And Presentation Of Financial Statements [Table]
Product and Service
Product Or Service [Axis]
Product and Service
Products And Services [Domain]
Pneumococcal conjugate vaccine.
Pneumococcal Conjugate Vaccine
Pneumococcal Conjugate Vaccine [Member]
Sale of Stock
Subsidiary Sale Of Stock [Axis]
Sale of Stock
Sale Of Stock Name Of Transaction [Domain]
Initial Public Offering
I P O [Member]
Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Stock [Member]
Schedule Of Organization Consolidation And Presentation Of Financial Statements [Line Items]
Schedule Of Organization Consolidation And Presentation Of Financial Statements [Line Items]
Global target revenue
Global Target Revenue
Reverse stock split
Stockholders Equity Reverse Stock Split
Reverse stock split, conversion ratio
Stockholders Equity Note Stock Split Conversion Ratio1
Payments of underwriting discounts and commissions.
Shares issued upon full exercise of underwriters option to purchase additional shares.
Shares issued and sold
Underwriters’ option to purchase additional shares
Shares Issued Upon Full Exercise Of Underwriters Option To Purchase Additional Shares
Public offering price per share
Shares Issued Price Per Share
Net proceeds from initial public offering
Proceeds From Issuance Initial Public Offering
Underwriting discounts and commissions
Payments Of Underwriting Discounts And Commissions
Offering expenses
Initial public offering related cost.
New Accounting Pronouncements Or Change In Accounting Principle [Table]
New Accounting Pronouncements Or Change In Accounting Principle [Table]
Balance Sheet Location
Balance Sheet Location [Axis]
Balance Sheet Location
Balance Sheet Location [Domain]
Other Assets
Other Noncurrent Assets [Member]
Accounting Standards Update
Adjustments For New Accounting Pronouncements [Axis]
Accounting Standards Update
Type Of Adoption [Member]
ASU 2018-07
Accounting Standards Update201807 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
IPO-related costs
Initial Public Offering Related Cost
Deferred offering costs
Deferred Offering Costs
Accounting standard update adopted
Change In Accounting Principle Accounting Standards Update Adopted
Accounting standard update material impact
Change In Accounting Principle Accounting Standards Update Immaterial Effect
Accounting standard update adoption date
Change In Accounting Principle Accounting Standards Update Adoption Date
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table]
Liability Class
Fair Value By Liability Class [Axis]
Fair Value by Liability Class
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain]
Warrant liability.
Warrant Liability
Warrant Liability [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding
Class Of Warrant Or Right Outstanding
Preferred stock warrant outstanding measurement input.
Fair Value Hierarchy and NAV
Fair Value By Fair Value Hierarchy Level [Axis]
Fair Value Hierarchy and NAV
Fair Value Measurements Fair Value Hierarchy [Domain]
Level 3
Fair Value Inputs Level3 [Member]
Measurement Frequency
Fair Value By Measurement Frequency [Axis]
Measurement Frequency
Fair Value Measurement Frequency [Domain]
Fair Value, Recurring
Fair Value Measurements Recurring [Member]
Measurement Input Type
Measurement Input Type [Axis]
Measurement Input Type
Measurement Input Type [Domain]
Value of Series C Redeemable Preferred Stock Per Share
Measurement Input Share Price [Member]
Risk Free Rate
Measurement Input Risk Free Interest Rate [Member]
Volatility
Measurement Input Price Volatility [Member]
Term in Years
Measurement Input Expected Term [Member]
Valuation Approach and Technique
Valuation Technique [Axis]
Valuation Approach and Technique
Valuation Technique [Domain]
Option Pricing Model
Valuation Technique Option Pricing Model [Member]
Financial Instrument
Financial Instrument [Axis]
Financial Instruments
Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain]
Redeemable convertible preferred stock warrant.
Redeemable Convertible Preferred Stock Warrant
Redeemable Convertible Preferred Stock Warrant [Member]
Warrants and rights outstanding measurement input
Warrants And Rights Outstanding Measurement Input
Warrants and rights outstanding measurement input
Preferred Stock Warrant Outstanding Measurement Input
Warrants and rights outstanding measurement input
Warrants And Rights Outstanding Term
Fair value assets transferred from level 1 to level 2
Fair Value Assets Level1 To Level2 Transfers Amount
Fair value assets transferred from level 2 to level 1
Fair Value Assets Level2 To Level1 Transfers Amount
Fair value liabilities transferred from level 1 to level 2
Fair Value Liabilities Level1 To Level2 Transfers Amount
Fair value liabilities transferred from level 2 to level 1
Fair Value Liabilities Level2 To Level1 Transfers Amount
Fair value assets transferred into level 3
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3
Fair value assets transferred out of level 3
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3
Fair value liabilities transferred into level 3
Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Into Level3
Fair value liabilities transferred out of level 3
Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Out Of Level3
Asset Class
Fair Value By Asset Class [Axis]
Asset Class
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain]
Money Market Funds
Money Market Funds [Member]
Level 1
Fair Value Inputs Level1 [Member]
Level 2
Fair Value Inputs Level2 [Member]
Redeemable convertible preferred stock warrant liability.
Redeemable Convertible Preferred Stock Warrant Liability
Redeemable Convertible Preferred Stock Warrant Liability [Member]
Assets:
Assets Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure
Assets Fair Value Disclosure
Liabilities:
Liabilities Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure
Liabilities Fair Value Disclosure
New warrant liabilities issued
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance
Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value
Change in fair value
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Period Increase Decrease
Warrant liability write-off upon IPO
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements
Balance
Schedule Of Property Plant And Equipment [Table]
Schedule Of Property Plant And Equipment [Table]
Long-Lived Tangible Asset
Property Plant And Equipment By Type [Axis]
Long-Lived Tangible Asset
Property Plant And Equipment Type [Domain]
Furniture and Equipment
Furniture And Fixtures [Member]
Computers and computer software.
Computers and Computer Software
Computers And Computer Software [Member]
Lab equipment.
Lab Equipment
Lab Equipment [Member]
Leasehold Improvements
Leasehold Improvements [Member]
Capital leases — lab equipment.
Capital Leases — Lab Equipment
Capital Leases Lab Equipment [Member]
Construction in Progress
Construction In Progress [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment [Line Items]
Total property and equipment
Property Plant And Equipment Gross
Less: accumulated depreciation and amortization
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Property and equipment, net
Property Plant And Equipment [Abstract]
Statistical Measurement
Range [Axis]
Statistical Measurement
Range [Member]
Maximum
Maximum [Member]
Minimum
Minimum [Member]
Depreciation and amortization expense
Depreciation And Amortization
Capital lease amortization expense
Capital Leases Income Statement Amortization Expense
Accrued preclinical studies current.
Accrued Liabilities Current [Abstract]
Preclinical studies
Accrued Preclinical Studies Current
Professional fees
Accrued Professional Fees Current
Other accrued expenses
Other Accrued Liabilities Current
Total
Lessee finance lease interest rate.
Loss Contingencies [Table]
Loss Contingencies [Table]
Counterparty Name
Counterparty Name [Axis]
Counterparty Name
Repurchase Agreement Counterparty Name [Domain]
Lonza limited.
Lonza DMSA
Lonza Limited [Member]
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Lease term
Lessee Finance Lease Term Of Contract1
Lease interest rate
Lessee Finance Lease Interest Rate
Percentage of annual rental payments including guaranteed residual value.
Present value of annual rental payments including guaranteed residual value, percentage
Percentage Of Annual Rental Payments Including Guaranteed Residual Value
Number of lab equipment.
Lease buyout agreement, number of lab equipment
Number Of Lab Equipment
Lease buyout agreement, remaining balance of lease liability
Other Commitments Future Minimum Payments Remainder Of Fiscal Year
Future minimum payments required under capital leases
Capital Leases Future Minimum Payments Due
Capital Lease Equipment
Property and equipment, gross
Useful life
Property Plant And Equipment Useful Life
Operating lease, agreement term
Lessee Operating Lease Term Of Contract
Operating lease, renewal term
Lessee Operating Lease Renewal Term
Operating lease, description
Lessee Operating Lease Description
Remainder of 2020
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
2021
Lessee Operating Lease Liability Payments Due Next Twelve Months
Total future minimum payments
Lessee Operating Lease Liability Payments Due
Operating leases, rent expense recognized
Operating Leases Rent Expense Net
Development and manufacturing services agreement equity payments percentage.
Development and manufacturing services agreement payments in equity.
Threshold limit on equity payments.
Payments in equity, percentage
Development And Manufacturing Services Agreement Equity Payments Percentage
Payments in equity, amount
Development And Manufacturing Services Agreement Payments In Equity
Equity payment, upper limit
Threshold Limit On Equity Payments
Amount recorded with respect to the potential future payments above the initial cash cap
Guarantee Obligations Maximum Exposure
Temporary Equity By Class Of Stock [Table]
Temporary Equity By Class Of Stock [Table]
Temporary Equity [Line Items]
Temporary Equity [Line Items]
Preferred stock converted into common stock
Redeemable convertible preferred stock, shares issued
Redeemable convertible preferred stock, shares outstanding
Preferred stock, shares issued
Purchase price per share
Aggregate purchase price
Common stock, par value per share
Common stock, dividends, per share, declared
Common Stock Dividends Per Share Declared
Common stock, voting rights
Common Stock Voting Rights
Equity incentive plan, shares issued
Share Based Compensation Arrangement By Share Based Payment Award Shares Issued In Period
Schedule Of Stock By Class [Table]
Schedule Of Stock By Class [Table]
Common Stock Warrant
Warrant [Member]
Conversion of redeemable convertible preferred stock.
Conversion of Redeemable Convertible Preferred Stock
Conversion Of Redeemable Convertible Preferred Stock [Member]
Award Type
Award Type [Axis]
Award Type
Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]
Options Issued and Outstanding
Employee Stock Option [Member]
Shares available for future stock option grants.
Shares Available for Future Stock Option Grants
Shares Available For Future Stock Option Grants [Member]
Class Of Stock [Line Items]
Class Of Stock [Line Items]
Reserved common stock for future issuances
Common Stock Capital Shares Reserved For Future Issuance
Class of warrant or right number of securities called by each warrant or right exercised.
Class Of Warrant Or Right [Table]
Class Of Warrant Or Right [Table]
Common stock warrant.
Common Stock Warrant
Common Stock Warrant [Member]
Class Of Warrant Or Right [Line Items]
Class Of Warrant Or Right [Line Items]
Warrant exercised
Class Of Warrant Or Right Number Of Securities Called By Each Warrant Or Right Exercised
Class of warrant or right issue date.
Number of Warrants Issued and Outstanding
Issue Date
Class Of Warrant Or Right Issue Date
Expiration Date
Warrants And Rights Outstanding Maturity Date
Exercise Price
Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Two thousand twenty equity incentive plan.
2020 Equity Incentive Plan
Two Thousand Twenty Equity Incentive Plan [Member]
Two thousand fourteen equity incentive plan.
2014 Equity Incentive Plan
Two Thousand Fourteen Equity Incentive Plan [Member]
Other Liabilities
Other Noncurrent Liabilities [Member]
Performance-based Awards
Performance Shares [Member]
IPO
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance
Term of plan
Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period
Percentage of outstanding number of shares
Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Outstanding Stock Maximum
Aggregate number of shares available for issuance
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant
Number of shares outstanding
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
Early exercised stock options.
Remaining liabilities related to early exercised shares.
Early exercised stock options
Early Exercised Stock Options
Remaining liabilities related to early exercised shares
Remaining Liabilities Related To Early Exercised Shares
Options granted
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross
Share-based compensation arrangement by share-based payment award number of shares available for grant granted in period.
Share-based compensation arrangement by share-based payment award number of shares available for grant exercised in period.
Share-based compensation arrangement by share-based payment award number of shares available for grant forfeited in period.
Options Available for Grant, Beginning Balance
Options Available for Grant, Additional shares authorized
Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized
Options Available for Grant, granted
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Granted In Period
Options Available for Grant, exercised
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Exercised In Period
Options Available for Grant, forfeited
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Forfeited In Period
Options Available for Grant, Ending Balance
Number of Options, Beginning Balance
Number of Options, granted
Number of Options, exercised
Number of Options, forfeited
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period
Number of Options, Ending Balance
Number of Options, Vested and expected to vest
Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number
Number of Options, Exercisable
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number
Weighted-Average Exercise Price Per Share, Beginning Balance
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price
Weighted-Average Exercise Price Per Share, Options granted
Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price
Weighted-Average Exercise Price Per Share, Options exercised
Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price
Weighted-Average Exercise Price Per Share, Options forfeited
Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price
Weighted-Average Exercise Price Per Share, Ending Balance
Weighted-Average Exercise Price Per Share, Vested and expected to vest
Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price
Weighted-Average Exercise Price Per Share, Exercisable
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price
Weighted-Average Remaining Contractual Term (Years)
Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2
Weighted-Average Remaining Contractual Term (Years), Vested and expected to vest
Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1
Weighted-Average Remaining Contractual Term (Years), Exercisable
Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1
Aggregate Intrinsic Value
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value
Aggregate Intrinsic Value, Vested and expected to vest
Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value
Aggregate Intrinsic Value, Exercisable
Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1
Weighted-average price per share
Weighted-average grant date fair value of options granted
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value
Intrinsic value of the stock options exercised
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
Percentage of payroll deductions of eligible compensation
Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Subscription Rate
Fair Value Assumptions
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Abstract]
Expected volatility
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate
Expected volatility, Minimum
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum
Expected volatility, Maximum
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Maximum
Expected dividend yield
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
Expected term (in years)
Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1
Risk-free interest rate
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
Risk-free interest rate, Minimum
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum
Risk-free interest rate, Maximum
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Maximum
Income Statement Location
Income Statement Location [Axis]
Income Statement Location
Income Statement Location [Domain]
Research and Development
Research And Development Expense [Member]
General and Administrative
General And Administrative Expense [Member]
Total stock-based compensation expense
Allocated Share Based Compensation Expense
Number of shares vested
Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares
Stock-based compensation expense
Initial funding committed by award.
Funding committed by award, available upon achievement of development milestones.
Funding period of award to develop universal vaccine to prevent infections.
Percentage of reimbursable expenses.
Funding arrangement.
Funding arrangement.
Funding Arrangement [Table]
Funding Arrangement [Table]
Collaborative Arrangement and Arrangement Other than Collaborative
Type Of Arrangement [Axis]
Collaborative Arrangement and Arrangement Other than Collaborative
Arrangements And Nonarrangement Transactions [Member]
Cost reimbursement sub-award agreement.
Cost Reimbursement Sub-Award Agreement
Cost Reimbursement Sub Award Agreement [Member]
Combating antibiotic resistant bacteria biopharmaceutical accelerator agreement.
CARB-X Agreement
Combating Antibiotic Resistant Bacteria Biopharmaceutical Accelerator Agreement [Member]
Minimum
Funding Arrangement [Line Items]
Funding Arrangement [Line Items]
Funding period of award to develop universal vaccine to prevent infections caused by Group A Strep bacteria
Funding Period Of Award To Develop Universal Vaccine To Prevent Infections
Percentage of reimbursable expenses
Percentage Of Reimbursable Expenses
Initial funding committed by award
Initial Funding Committed By Award
Total funding committed by award, available upon achievement of development milestones
Funding Committed By Award Available Upon Achievement Of Development Milestones
Grant receivable on unreimbursed, eligible costs incurred
Grants Receivable
Net loss (in thousands)
Net Income Loss Available To Common Stockholders Basic
Weighted-average shares outstanding used in computing net loss per share, basic and diluted
Net loss per share, basic and diluted
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table]
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table]
Antidilutive Securities
Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis]
Antidilutive Securities, Name
Antidilutive Securities Name [Domain]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
Tax provision
Income Tax Expense Benefit
Schedule Of Related Party Transactions By Related Party [Table]
Schedule Of Related Party Transactions By Related Party [Table]
Related Party
Related Party Transactions By Related Party [Axis]
Related Party
Related Party [Domain]
Sutro Biopharma, Inc.
Sutro Biopharma, Inc
Sutro Biopharma Inc [Member]
Preferred stock warrant.
Preferred Stock Warrant
Preferred Stock Warrant [Member]
Series C Redeemable Convertible Stock
Related Party Transaction
Related Party Transaction [Axis]
Related Party Transaction
Related Party Transaction [Domain]
License Amendment A Two.
License Amendment A2
License Amendment A Two [Member]
License Agreement.
License Agreement
License Agreement [Member]
Supply Agreement.
Supply Agreement
Supply Agreement [Member]
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Common stock, shares owned
Warrant to purchase shares of stock
Class Of Warrant Or Right Number Of Securities Called By Each Warrant Or Right
Warrant purchase price per share
Warrant exercised
Warrant exercisable and vests immediately and expires date
Class Of Warrant Or Righst Date From Which Warrants Or Rights Exercisable
Percentage of royalty payment on annual net sales of vaccine products for human health.
Percentage of royalty payment on net sales of vaccine compositions for animal health.
Percentage of royalty payment on annual net sales of vaccine products for human health
Percentage Of Royalty Payment On Annual Net Sales Of Vaccine Products For Human Health
Percentage of royalty payment on net sales of vaccine compositions for animal health
Percentage Of Royalty Payment On Net Sales Of Vaccine Compositions For Animal Health
Accrued expenses payable