3.26.1 html 227 275 1 false 70 0 false 13 false false R1.htm 0000001 - Document - Cover Page Sheet http://vitaltherapies.com/role/CoverPage Cover Page Cover 1 false false R2.htm 9952151 - Statement - Condensed Consolidated Balance Sheets Sheet http://vitaltherapies.com/role/CondensedConsolidatedBalanceSheets Condensed Consolidated Balance Sheets Statements 2 false false R3.htm 9952152 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Sheet http://vitaltherapies.com/role/CondensedConsolidatedBalanceSheetsParenthetical Condensed Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 9952153 - Statement - Condensed Consolidated Statements of Operations Sheet http://vitaltherapies.com/role/CondensedConsolidatedStatementsofOperations Condensed Consolidated Statements of Operations Statements 4 false false R5.htm 9952154 - Statement - Condensed Consolidated Statements of Comprehensive Loss Sheet http://vitaltherapies.com/role/CondensedConsolidatedStatementsofComprehensiveLoss Condensed Consolidated Statements of Comprehensive Loss Statements 5 false false R6.htm 9952155 - Statement - Condensed Consolidated Statements of Stockholders??? Equity (Deficit) Sheet http://vitaltherapies.com/role/CondensedConsolidatedStatementsofStockholdersEquityDeficit Condensed Consolidated Statements of Stockholders??? Equity (Deficit) Statements 6 false false R7.htm 9952156 - Statement - Condensed Consolidated Statements of Stockholders??? Equity (Deficit) (Parenthetical) Sheet http://vitaltherapies.com/role/CondensedConsolidatedStatementsofStockholdersEquityDeficitParenthetical Condensed Consolidated Statements of Stockholders??? Equity (Deficit) (Parenthetical) Statements 7 false false R8.htm 9952157 - Statement - Condensed Consolidated Statements of Cash Flows Sheet http://vitaltherapies.com/role/CondensedConsolidatedStatementsofCashFlows Condensed Consolidated Statements of Cash Flows Statements 8 false false R9.htm 9952158 - Disclosure - Description of Business and Basis of Financial Statements Sheet http://vitaltherapies.com/role/DescriptionofBusinessandBasisofFinancialStatements Description of Business and Basis of Financial Statements Notes 9 false false R10.htm 9952159 - Disclosure - Summary of Significant Accounting Policies Sheet http://vitaltherapies.com/role/SummaryofSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 10 false false R11.htm 9952160 - Disclosure - Balance Sheet Details Sheet http://vitaltherapies.com/role/BalanceSheetDetails Balance Sheet Details Notes 11 false false R12.htm 9952161 - Disclosure - Leases Sheet http://vitaltherapies.com/role/Leases Leases Notes 12 false false R13.htm 9952162 - Disclosure - Fair Value Sheet http://vitaltherapies.com/role/FairValue Fair Value Notes 13 false false R14.htm 9952163 - Disclosure - Common Stock Sheet http://vitaltherapies.com/role/CommonStock Common Stock Notes 14 false false R15.htm 9952164 - Disclosure - Stock-Based Compensation Plans Sheet http://vitaltherapies.com/role/StockBasedCompensationPlans Stock-Based Compensation Plans Notes 15 false false R16.htm 9952165 - Disclosure - Related Party Transactions Sheet http://vitaltherapies.com/role/RelatedPartyTransactions Related Party Transactions Notes 16 false false R17.htm 9952166 - Disclosure - Commitments and Contingencies Sheet http://vitaltherapies.com/role/CommitmentsandContingencies Commitments and Contingencies Notes 17 false false R18.htm 9952167 - Disclosure - Segment Disclosures Sheet http://vitaltherapies.com/role/SegmentDisclosures Segment Disclosures Notes 18 false false R19.htm 9952168 - Disclosure - Subsequent Events Sheet http://vitaltherapies.com/role/SubsequentEvents Subsequent Events Notes 19 false false R20.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 20 false false R21.htm 9955511 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://vitaltherapies.com/role/SummaryofSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://vitaltherapies.com/role/SummaryofSignificantAccountingPolicies 21 false false R22.htm 9955512 - Disclosure - Summary of Significant Accounting Policies (Tables) Sheet http://vitaltherapies.com/role/SummaryofSignificantAccountingPoliciesTables Summary of Significant Accounting Policies (Tables) Tables http://vitaltherapies.com/role/SummaryofSignificantAccountingPolicies 22 false false R23.htm 9955513 - Disclosure - Balance Sheet Details (Tables) Sheet http://vitaltherapies.com/role/BalanceSheetDetailsTables Balance Sheet Details (Tables) Tables http://vitaltherapies.com/role/BalanceSheetDetails 23 false false R24.htm 9955514 - Disclosure - Leases (Tables) Sheet http://vitaltherapies.com/role/LeasesTables Leases (Tables) Tables http://vitaltherapies.com/role/Leases 24 false false R25.htm 9955515 - Disclosure - Fair Value (Tables) Sheet http://vitaltherapies.com/role/FairValueTables Fair Value (Tables) Tables http://vitaltherapies.com/role/FairValue 25 false false R26.htm 9955516 - Disclosure - Common Stock (Tables) Sheet http://vitaltherapies.com/role/CommonStockTables Common Stock (Tables) Tables http://vitaltherapies.com/role/CommonStock 26 false false R27.htm 9955517 - Disclosure - Stock-Based Compensation Plans (Tables) Sheet http://vitaltherapies.com/role/StockBasedCompensationPlansTables Stock-Based Compensation Plans (Tables) Tables http://vitaltherapies.com/role/StockBasedCompensationPlans 27 false false R28.htm 9955518 - Disclosure - Segment Disclosures (Tables) Sheet http://vitaltherapies.com/role/SegmentDisclosuresTables Segment Disclosures (Tables) Tables http://vitaltherapies.com/role/SegmentDisclosures 28 false false R29.htm 9955519 - Disclosure - Description of Business and Basis of Financial Statements (Details) Sheet http://vitaltherapies.com/role/DescriptionofBusinessandBasisofFinancialStatementsDetails Description of Business and Basis of Financial Statements (Details) Details http://vitaltherapies.com/role/DescriptionofBusinessandBasisofFinancialStatements 29 false false R30.htm 9955520 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) Sheet http://vitaltherapies.com/role/SummaryofSignificantAccountingPoliciesAdditionalInformationDetails Summary of Significant Accounting Policies - Additional Information (Details) Details 30 false false R31.htm 9955521 - Disclosure - Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Securities Not Included in Calculation of Diluted Net Loss per Share (Details) Sheet http://vitaltherapies.com/role/SummaryofSignificantAccountingPoliciesScheduleofPotentiallyDilutiveSecuritiesNotIncludedinCalculationofDilutedNetLossperShareDetails Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Securities Not Included in Calculation of Diluted Net Loss per Share (Details) Details 31 false false R32.htm 9955522 - Disclosure - Balance Sheet Details - Schedule of Other Current Assets and Prepaid Expenses (Detail) Sheet http://vitaltherapies.com/role/BalanceSheetDetailsScheduleofOtherCurrentAssetsandPrepaidExpensesDetail Balance Sheet Details - Schedule of Other Current Assets and Prepaid Expenses (Detail) Details 32 false false R33.htm 9955523 - Disclosure - Balance Sheet Details - Schedule of Accounts Payable (Detail) Sheet http://vitaltherapies.com/role/BalanceSheetDetailsScheduleofAccountsPayableDetail Balance Sheet Details - Schedule of Accounts Payable (Detail) Details 33 false false R34.htm 9955524 - Disclosure - Balance Sheet Details - Schedule of Accrued Expenses (Detail) Sheet http://vitaltherapies.com/role/BalanceSheetDetailsScheduleofAccruedExpensesDetail Balance Sheet Details - Schedule of Accrued Expenses (Detail) Details 34 false false R35.htm 9955525 - Disclosure - Balance Sheet Details - Schedule of Other Current Liabilities (Detail) Sheet http://vitaltherapies.com/role/BalanceSheetDetailsScheduleofOtherCurrentLiabilitiesDetail Balance Sheet Details - Schedule of Other Current Liabilities (Detail) Details 35 false false R36.htm 9955526 - Disclosure - Leases - Additional Information (Details) Sheet http://vitaltherapies.com/role/LeasesAdditionalInformationDetails Leases - Additional Information (Details) Details 36 false false R37.htm 9955527 - Disclosure - Leases - Schedule of Maturities of Operating Lease Obligations (Details) Sheet http://vitaltherapies.com/role/LeasesScheduleofMaturitiesofOperatingLeaseObligationsDetails Leases - Schedule of Maturities of Operating Lease Obligations (Details) Details 37 false false R38.htm 9955528 - Disclosure - Fair Value - Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) Sheet http://vitaltherapies.com/role/FairValueScheduleofFinancialAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails Fair Value - Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) Details 38 false false R39.htm 9955529 - Disclosure - Fair Value - Additional Information (Details) Sheet http://vitaltherapies.com/role/FairValueAdditionalInformationDetails Fair Value - Additional Information (Details) Details 39 false false R40.htm 9955530 - Disclosure - Fair Value - Schedule of Fair Value of Tranche Rights (Details) Sheet http://vitaltherapies.com/role/FairValueScheduleofFairValueofTrancheRightsDetails Fair Value - Schedule of Fair Value of Tranche Rights (Details) Details 40 false false R41.htm 9955531 - Disclosure - Fair Value - Schedule of Key Assumptions Used In Estimating the Fair Value of SARs (Details) Sheet http://vitaltherapies.com/role/FairValueScheduleofKeyAssumptionsUsedInEstimatingtheFairValueofSARsDetails Fair Value - Schedule of Key Assumptions Used In Estimating the Fair Value of SARs (Details) Details 41 false false R42.htm 9955532 - Disclosure - Common Stock - Shelf Registration Statement (Details) Sheet http://vitaltherapies.com/role/CommonStockShelfRegistrationStatementDetails Common Stock - Shelf Registration Statement (Details) Details 42 false false R43.htm 9955533 - Disclosure - Common Stock - Schedule of Shares Reserved for Future Issuance (Details) Sheet http://vitaltherapies.com/role/CommonStockScheduleofSharesReservedforFutureIssuanceDetails Common Stock - Schedule of Shares Reserved for Future Issuance (Details) Details 43 false false R44.htm 9955534 - Disclosure - Common Stock - Equity Offering (Details) Sheet http://vitaltherapies.com/role/CommonStockEquityOfferingDetails Common Stock - Equity Offering (Details) Details 44 false false R45.htm 9955535 - Disclosure - Common Stock - Common Stock (Details) Sheet http://vitaltherapies.com/role/CommonStockCommonStockDetails Common Stock - Common Stock (Details) Details 45 false false R46.htm 9955536 - Disclosure - Common Stock - Pre-funded Warrants (Details) Sheet http://vitaltherapies.com/role/CommonStockPrefundedWarrantsDetails Common Stock - Pre-funded Warrants (Details) Details 46 false false R47.htm 9955537 - Disclosure - Common Stock - Preferred Stock (Details) Sheet http://vitaltherapies.com/role/CommonStockPreferredStockDetails Common Stock - Preferred Stock (Details) Details 47 false false R48.htm 9955538 - Disclosure - Stock-Based Compensation Plans - Additional Information (Details) Sheet http://vitaltherapies.com/role/StockBasedCompensationPlansAdditionalInformationDetails Stock-Based Compensation Plans - Additional Information (Details) Details 48 false false R49.htm 9955539 - Disclosure - Stock-Based Compensation Plans - Schedule of Stock Option Activity (Details) Sheet http://vitaltherapies.com/role/StockBasedCompensationPlansScheduleofStockOptionActivityDetails Stock-Based Compensation Plans - Schedule of Stock Option Activity (Details) Details 49 false false R50.htm 9955540 - Disclosure - Stock-Based Compensation Plans - Schedule of Valuation Assumptions Used (Detail) Sheet http://vitaltherapies.com/role/StockBasedCompensationPlansScheduleofValuationAssumptionsUsedDetail Stock-Based Compensation Plans - Schedule of Valuation Assumptions Used (Detail) Details 50 false false R51.htm 9955541 - Disclosure - Stock-Based Compensation Plans - Schedule of SARs Activity (Details) Sheet http://vitaltherapies.com/role/StockBasedCompensationPlansScheduleofSARsActivityDetails Stock-Based Compensation Plans - Schedule of SARs Activity (Details) Details 51 false false R52.htm 9955542 - Disclosure - Stock-Based Compensation Plans - Schedule of Stock-Based Compensation Expense for Stock Awards Recognized (Details) Sheet http://vitaltherapies.com/role/StockBasedCompensationPlansScheduleofStockBasedCompensationExpenseforStockAwardsRecognizedDetails Stock-Based Compensation Plans - Schedule of Stock-Based Compensation Expense for Stock Awards Recognized (Details) Details 52 false false R53.htm 9955543 - Disclosure - Related Party Transactions (Details) Sheet http://vitaltherapies.com/role/RelatedPartyTransactionsDetails Related Party Transactions (Details) Details http://vitaltherapies.com/role/RelatedPartyTransactions 53 false false R54.htm 9955544 - Disclosure - Commitments and Contingencies (Details) Sheet http://vitaltherapies.com/role/CommitmentsandContingenciesDetails Commitments and Contingencies (Details) Details http://vitaltherapies.com/role/CommitmentsandContingencies 54 false false R55.htm 9955545 - Disclosure - Segment Disclosures - Additional Information (Details) Sheet http://vitaltherapies.com/role/SegmentDisclosuresAdditionalInformationDetails Segment Disclosures - Additional Information (Details) Details 55 false false R56.htm 9955546 - Disclosure - Segment Disclosures - Schedule of Significant Expense (Details) Sheet http://vitaltherapies.com/role/SegmentDisclosuresScheduleofSignificantExpenseDetails Segment Disclosures - Schedule of Significant Expense (Details) Details 56 false false R57.htm 9955547 - Disclosure - Subsequent Events (Details) Sheet http://vitaltherapies.com/role/SubsequentEventsDetails Subsequent Events (Details) Details http://vitaltherapies.com/role/SubsequentEvents 57 false false All Reports Book All Reports vtl-20260331.htm vtl-20260331.xsd vtl-20260331_cal.xml vtl-20260331_def.xml vtl-20260331_lab.xml vtl-20260331_pre.xml vtl-20260331_g1.jpg http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 true true