Document And Entity Information
Expected dividend rate
Note To Financial Statement Details Textual
Significant Accounting Policies
Tax at statutory federal rate
Note 1 - Organization and Summary of Significant Accounting Policies
RSU's, ESPP, and Employee Stock Options [Member]
Represents the antidilutive securities types; restricted stock units, employee stock purchase plan, and employee stock options.
Note 2 - Investments and Fair Value Measurement
Risk-free interest rate, maximum
Note 3 - Discontinued Operations
Note 4 - Asset Acquisition
Note 7 - Liability Related to Sale of Future Royalties
Exercise Price Range 3 [Member]
Related to the third exercise price range.
Note 10 - Warrants
Exercise Price Range 4 [Member]
Related to the fourth exercise price range.
Note 11 - Stock-based Compensation
Exercise Price Range 1 [Member]
Related to the first exercise price range.
Note 12 - Net Income (Loss) per Share of Common Stock
Exercise Price Range 2 [Member]
Related to the second exercise price range.
Risk-free interest rate, minimum
Income Tax Disclosure [Text Block]
Note 13 - Accrued Liabilities
Note 15 - Income Taxes
Note 1 - Organization and Summary of Significant Accounting Policies - Schedule of Cash and Cash Equivalents (Details)
Share-based Compensation Arrangement by Share-based Payment Award, Options Exercisable and Vested, Weighted Average Exercise Price
The weighted average exercise price of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Expected volatility
Note 2 - Investments and Fair Value Measurement - Summary of Cash, Cash Equivalents and Investments (Details)
us-gaap_LiabilitiesCurrent
Total current liabilities
Note 2 - Investments and Fair Value Measurement - Fair Value of Financial Assets and Liabilities by Level Within Fair Value Hierarchy (Details)
Liabilities of discontinued operations, current portion
Total current liabilities of discontinued operations
Note 2 - investments and Fair Value Measurement - Changes in Level III Financial Liabilities (Details)
Expected term (in years) (Year)
Note 3 - Discontinued Operations - Summary of Discontinued Operations (Details)
us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable
us-gaap_BusinessCombinationConsiderationTransferred1
Business Combination, Consideration Transferred
Note 4 - Asset Acquisition - Consideration for Acquisition (Details)
Note 4 - Asset Acquisition - Consideration for Acquisition (Details) (Parentheticals)
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Note 7 - Liability Related to Sale of Future Royalties - Activity of Liability Related to Sale of Future Royalties (Details)
Note 10 - Warrants - Schedule of Warrant Activity (Details)
Subject to Expiration [Member]
Note 10 - Warrants (Details)
Note 11 - Stock-based Compensation - Stock-based Compensation Expense (Details)
Note 11 - Stock-based Compensation - Restricted Stock Activity (Details)
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Note 11 - Stock-based Compensation - Option Activity (Details)
Accruals and other
Note 11 - Stock-based Compensation - Stock Options Outstanding, Vested and Exercisable (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Granted (in dollars per share)
Note 11 - Stock-based Compensation - Assumptions to Calculate Fair Value of Each Performance-based Stock Option (Details)
Proceeds from maturities of investments
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Vested (in dollars per share)
Note 12 - Net Income (Loss) per Share of Common Stock - Computation of Basic and Diluted Net Income (Loss) (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
Forfeited (in dollars per share)
Note 12 - Net Income (Loss) Per Share of Common Stock - Common Stock Excluded From Computation of Diluted Net Loss Per Share (Details)
Gain on termination of lease liabilities
Gain on termination of lease liabilities
Gain on termination of lease liabilities
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Restricted stock units outstanding, January 1, 2021 (in dollars per share)
Restricted stock units outstanding, December 31, 2021 (in dollars per share)
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
Note 13 - Accrued Liabilities - Accrued Liabilities (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Forfeited (in shares)
Note 15 - Income Taxes - Net Deferred Tax Assets (Details)
Note 15 - Income Taxes - Reconciliation of Statutory Federal Income Tax (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Restricted stock units outstanding, January 1, 2021 (in shares)
Restricted stock units outstanding, December 31, 2021 (in shares)
Note 15 - Income Taxes - Reconciliation of Beginning and Ending Balance of Unrecognized Tax Benefits (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
US Government Agencies Debt Securities [Member]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Granted (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Vested (in shares)
Vested and expected to vest—December 31, 2022 (Year)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number
us-gaap_LongTermDebtCurrent
Long-term debt, current portion
Business Description of Entity [Policy Text Block]
Disclosure of the accounting policy regarding the business description of entity.
Vested and exercisable options—December 31, 2022 (in dollars per share)
Vested and exercisable options—December 31, 2022
Vested and expected to vest—December 31, 2022 (in shares)
Vested and expected to vest—December 31, 2022 (in dollars per share)
Vested and expected to vest—December 31, 2022
tlph_DefinedContributionPlanEmployerDiscretionaryContributionPercentage
Defined Contribution Plan, Employer Discretionary Contribution Percentage
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value
tlph_ContributionsByEmployerToPostemploymentBenefitObligations
Contributions by Employer to Postemployment Benefit Obligations
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
December 31, 2022 (Year)
December 31, 2022
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)
us-gaap_PaymentsToAcquireShortTermInvestments
Purchase of investments
Financial Instruments [Domain]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price
December 31, 2021 (in dollars per share)
December 31, 2022 (in dollars per share)
Forfeited (in dollars per share)
Expired (in dollars per share)
Financial Instrument [Axis]
Vested and exercisable options—December 31, 2022 (in shares)
Vested and exercisable options—December 31, 2022 (Year)
Lowell Therapeutics [Member]
Related to Lowell Therapeutics.
Granted (in dollars per share)
Schedule of Share-based Compensation, Stock Options Outstanding and Exercisable Activity [Table Text Block]
Exercised (in dollars per share)
Accrued and other liabilities
Total accrued liabilities
Sale of the DSUVIA assets
Accounts payable
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number
December 31, 2021 (in shares)
December 31, 2022 (in shares)
tlph_BusinessCombinationConsiderationTransferredNetOfCashAcquired
Business Combination, Consideration Transferred, Net of Cash Acquired
Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer, net of the cash acquired from the purchase.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod
Expired (in shares)
Warrants, Policy [Policy Text Block]
Disclosure of accounting policy for warrants.
Other accrued liabilities
Cash, Cash Equivalents and Investments [Table Text Block]
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)
Accrued professional services
Dilutive effect of warrants (in shares)
Indefinite-Lived Intangible Assets [Axis]
Indefinite-Lived Intangible Assets, Major Class Name [Domain]
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchase of property and equipment
Dilutive effect of RSUs (in shares)
Cash, cash equivalents and restricted cash—End of period
tlph_EmployeeStockPurchasePlanSharesIssuedWeightedAverageFairValue
Employee Stock Purchase Plan, Shares Issued, Weighted Average Fair Value (in dollars per share)
Represents the weighted average fair value of shares issued under an ESPP.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)
Income taxes paid
tlph_LiabilityRelatedToSaleOfFutureRoyalties
Liability related to sale of future royalties — beginning balance
Represents liability related to future royalties.
Weighted average shares outstanding — basic (in shares)
us-gaap_WeightedAverageNumberOfSharesIssuedBasic
Current Liabilities:
Vesting [Axis]
Operating lease liabilities
us-gaap_IncreaseDecreaseInOperatingLeaseLiability
Vesting [Domain]
us-gaap_Assets
Total assets
Supplemental Disclosures of Cash Flow Information:
us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation
Total assets of discontinued operations
Plan Name [Axis]
Plan Name [Domain]
In Process Research and Development [Member]
us-gaap_LossContingencyNumberOfDefendants
Loss Contingency, Number of Defendants
us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic
Net income (loss) from continuing operations attributable to common shareholders, basic
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Net loss from discontinued operations attributable to common shareholders, basic
us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net income (loss) attributable to Common Shareholders, basic
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted
Net income (loss) from continuing operations attributable to common shareholders, diluted
us-gaap_NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersDiluted
Net loss from discontinued operations attributable to common shareholders, diluted
Net income (loss) attributable to Common Shareholders, diluted
Net income (loss) attributable to common shareholders, diluted
us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet
Accounts receivable, net
us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic
Income allocated to participating securities
Prefunded 2024 Warrants [Member]
Relating to the prefunded 2024 warrants.
Amended Series A Common Stock Warrants [Member]
Relating to the amended Series A Common Stock Warrants.
tlph_PreferredStockStatedValuePerShare
Preferred Stock Stated Value Per Share (in dollars per share)
Stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.
tlph_LicenseAgreementPercentageOfRoyaltyPaymentsBasedOnNetSalesAndMilestonePayments
License Agreement, Percentage of Royalty Payments Based on Net Sales and Milestone Payments
Represents the percentage of of royalty payments based on net sales and milestone payments.
The January 2024 Private Placement [Member]
Relating to the January 2024 Private Placement.
Share-Based Payment Arrangement [Text Block]
Amended Series B Common Stock Warrants [Member]
Relating to the amended Series B Common Stock Warrants.
Amended Series A and B Common Stock Warrants [Member]
Relating to the amended Series A and B Common Stock Warrants
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Contingent Consideration by Type [Axis]
August 2022 LPC Warrant [Member]
Relating to August 2022 LPC Warrant.
Contingent Consideration Type [Domain]
tlph_PreferredStockCompanyOptionToConvertPercentageOfStatedValue
Preferred Stock, Company Option to Convert, Percentage of Stated Value
Percentage of stated value that preferred stock can be converted from company options to convert.
Agreement After Stepdown Date [Member]
Relating to an agreement after the stepdown date.
Equity Interest Type [Axis]
tlph_PreferredStockPurchaserOptionToConvertPercentageOfStatedValue
Preferred Stock, Purchaser Option to Convert, Percentage of Stated Value
Percentage of stated value that preferred stock can be converted to by purchaser.
tlph_LicenseAgreementPercentageOfRoyaltyPaymentsExcludingDepartmentOfDefenseSalesAndMilestonePayments
License Agreement, Percentage of Royalty Payments Excluding Department of Defense Sales and Milestone Payments
Represents the percentage of royalty payments excluding Department of Defense sales and milestone payments.
Equity Interest Issued or Issuable, Type [Domain]
tlph_ReverseStockSplitPreferredStockVotesPerShare
Reverse Stock Split, Preferred Stock Votes per Share
Amount of votes preferred stock have on reverse stock split decision, per share.
Award Type [Domain]
us-gaap_RedeemablePreferredStockDividends
Deemed dividend related to Series A Redeemable Convertible Preferred Stock
Net income (loss) from continuing operations
us-gaap_IncomeLossFromContinuingOperations
Net (loss) income from continuing operations
Net loss from discontinued operations – See Note 3
Net loss from discontinued operations
Net (loss) income
Net income (loss)
Net income (loss)
Basis of Presentation and Significant Accounting Policies [Text Block]
Award Type [Axis]
Deemed dividends related to Series A Redeemable Convertible Preferred Stock
Deemed dividends related to preferred stock.
In-process research and development asset
Restricted Stock Units (RSUs) [Member]
Performance Shares [Member]
Warrant [Member]
tlph_PreferredStockEliminationOfDesignationShares
Preferred Stock, Elimination of Designation, Shares (in shares)
Amount of preferred shares eliminated.
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
tlph_ProceedsFromIssuanceOrSaleOfEquityNet
Proceeds from Issuance or Sale of Equity, Net
Proceeds from issuance or sale of equity, net of other costs.
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
us-gaap_UndistributedEarningsLossAvailableToCommonShareholdersDiluted
Less: income allocated to participating securities
Business Combination Disclosure [Text Block]
Commitments and Contingencies Disclosure [Text Block]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Revaluation of liability for Lowell holdback shares
Represents non-cash issuance of holdback shares.
Series B Common Stock Warrants [Member]
Represents series B common stock warrants.
Series A Common Stock Warrants [Member]
Represents series A common stock warrants.
Common Stock and Series A and Series B Common Stock Warrants [Member]
Represents common stock and series A and series B common stock warrants.
CASH FLOWS FROM INVESTING ACTIVITIES:
Short-term investment, fair value
us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax
Loss on sale of discontinued operations, before income taxes
Non-cash interest income on liability related to sale of future royalties
Non-cash interest (income) expense recognized
Amoutn of noncash interest income expense on liability related to sale of future royalties.
us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation
Income tax expense
tlph_CombinedOfferingPrice
Combined Offering Price (in dollars per share)
Represents combined offering price.
us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Loss on sale of discontinued operations
Earnings Per Share [Text Block]
Prefund Warrants [Member]
Represents prefund warrants.
us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities
Increase (Decrease) in Employee Related Liabilities
tlph_MaximumReimburseAmountOfPrivatePlacement
Maximum Reimburse Amount of Private Placement
Represents maximum reimburse expense of private placement.
us-gaap_IncomeTaxExpenseBenefit
Provision for income taxes
Income Tax Expense (Benefit)
Provision for income taxes
Accrued liabilities
us-gaap_IncreaseDecreaseInAccruedLiabilities
tlph_OneTimePaymentUponExerciseOfWarrant
One Time Payment Upon Exercise of Warrant
Represents one time payment upon exercise of warrant.
Accounts payable
us-gaap_IncreaseDecreaseInAccountsPayable
Before Tax Year 2018 [Member]
Identified as before tax year 2018.
Restricted cash
us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
Cash, amortized cost
Cash and cash equivalents
Stock-based compensation expense
U.S. government agency securities
Commercial paper
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
Change in fair value of December 2022 Common Stock Warrants
Money market funds, amortized cost
Amendment Flag
dei_CityAreaCode
City Area Code
Use of Estimates, Policy [Policy Text Block]
New Accounting Pronouncements, Policy [Policy Text Block]
Amended ESPP [Member]
Represents Amended ESPP.
Reclassification, Comparability Adjustment [Policy Text Block]
tlph_BusinessCombinationOptionsToPurchaseCapitalStockIssuedAndOutstandingCancelledExchangeForCommonStockValue
Business Combination, Options To Purchase Capital Stock Issued and Outstanding Cancelled, Exchange for Common Stock, Value
Represents the value of options to purchase capital stock and all shares of stock issued and outstanding cancelled in exchange for right to receive common stock.
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
Deferred revenue
us-gaap_IncreaseDecreaseInContractWithCustomerLiability
Issuance of common stock in connection with asset acquisition
The amount of common stock issued in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition.
Common Stock, Shares, Outstanding (in shares)
us-gaap_PreferredStockSharesOutstanding
Preferred Stock, Shares Outstanding (in shares)
us-gaap_IncreaseDecreaseInOtherOperatingAssets
Other assets
Current Fiscal Year End Date
tlph_BusinessCombinationAcquireeCommonStockToBeHeldBackToSatisfySomeObligationsValue
Business Combination, Acquiree Common Stock to Be Held Back to Satisfy Some Obligations, Value
Represents the value of acquiree common stock to be held back to satisfy some obligations.
tlph_BusinessCombinationCashAndStockPaidForTransactionCosts
Business Combination, Cash and Stock Paid for Transaction Costs
Amount of cash and stock paid for transaction costs in business combination.
Contingent Consideration Payable Upon Achievement of Milestones [Member]
Represents Contingent Consideration Payable Upon Achievement of Milestones.
us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Prepaid expenses and other assets
Common Stock to Settle Transaction Costs [Member]
Represents common stock to settle transaction costs.
us-gaap_DebtInstrumentInterestRateEffectivePercentage
Debt Instrument, Interest Rate, Effective Percentage
Document Fiscal Period Focus
Document Fiscal Year Focus
Consolidation, Policy [Policy Text Block]
dei_DocumentPeriodEndDate
Document Period End Date
Establishment of right-of-use asset and lease liability
dei_EntityFileNumber
Entity File Number
Entity Emerging Growth Company
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
dei_DocumentType
Document Type
Gain on extinguishment of debt liability
Gain on extinguishment of debt
Entity Small Business
dei_EntityShellCompany
Entity Shell Company
Document Information [Line Items]
us-gaap_DividendsPreferredStock
Dividends, Preferred Stock
Document Information [Table]
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Fair value—beginning of period
Fair value—end of period
dei_EntityPublicFloat
Entity Public Float
Entity Filer Category
Debt Instrument [Axis]
dei_EntityCurrentReportingStatus
Entity Current Reporting Status
Debt Instrument, Name [Domain]
us-gaap_RestructuringCharges
Restructuring Charges
dei_EntityVoluntaryFilers
Entity Voluntary Filers
us-gaap_BusinessCombinationAcquisitionRelatedCosts
Business Combination, Acquisition Related Costs
dei_EntityWellKnownSeasonedIssuer
Entity Well-known Seasoned Issuer
Issuance of December 2022 Common Stock Warrants
Employee Stock Purchase Plan (ESPP) [Member]
Information about the employee stock purchase plan.
us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Impairment of property and equipment
us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)
Purchases of property and equipment in accounts payable and accrued expenses
Represents purchases of property and equipment that were acquired through accounts payable.
us-gaap_AdjustmentsToAdditionalPaidInCapitalIncreaseInCarryingAmountOfRedeemablePreferredStock
Deemed dividends related to Series A Redeemable Convertible Preferred Stock
us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Stock-based compensation
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable
Entity Tax Identification Number
Impairment of fixed assets
Impairment of fixed assets
Entity Central Index Key
dei_EntityRegistrantName
Entity Registrant Name
Liability Class [Axis]
Fair Value by Liability Class [Domain]
Entity [Domain]
Legal Entity [Axis]
dei_EntityAddressAddressLine1
Entity Address, Address Line One
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
dei_EntityAddressCityOrTown
Entity Address, City or Town
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
dei_EntityAddressPostalZipCode
Entity Address, Postal Zip Code
dei_EntityAddressStateOrProvince
Entity Address, State or Province
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Material Terms of Trading Arrangement [Text Block]
dei_EntityCommonStockSharesOutstanding
Entity Common Stock, Shares Outstanding (in shares)
Long-Term Debt [Text Block]
us-gaap_IncreaseDecreaseInInventories
Inventories
Trading Symbol
Issuance of common stock in connection with asset purchase (in shares)
Redemption of Series A Redeemable Convertible Preferred Stock and Warrants
Redemption of Series A Redeemable Convertible Preferred Stock and Warrants (in shares)
Issuance of common stock upon ESPP purchase (in shares)
dei_LocalPhoneNumber
Local Phone Number
Issuance of common stock in connection with asset purchase
(Settlement)/liability for held back shares issued in connection with asset acquisition
The noncash or part-noncash amount of liability for holdback shares under an acquisition.
us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Exercised (in shares)
us-gaap_TableTextBlock
Notes Tables
Issuance of common stock upon ESPP purchase
Issuance of common stock upon vesting of restricted stock units, net of shares withheld for employee taxes (in shares)
Issuance of common stock upon vesting of restricted stock units, net of shares withheld for employee taxes
Selling, general and administrative
Granted (in shares)
us-gaap_WarrantsAndRightsOutstandingMeasurementInput
Warrants and Rights Outstanding, Measurement Input
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Forfeited (in shares)
us-gaap_WarrantsAndRightsOutstandingTerm
Warrants and Rights Outstanding, Term (Year)
Collaborative Arrangement and Arrangement Other than Collaborative [Domain]
Issuance of Series A Redeemable Convertible Preferred Stock and Warrants (in shares)
Stock Issued During Period, Shares, New Issues (in shares)
Loan Agreement with Oxford Finance LLC [Member]
Represents information related to loan agreement with Oxford Finance LLC.
us-gaap_LiabilitiesAndStockholdersEquity
Total Liabilities and Stockholders’ Equity
Purported Shareholder v. Company - Violation of Sections 10(b) and 20(a) of the Exchange Act and SEC Rule 10b-5 [Member]
Information related to the violation of Sections 10(b) and 20(a) of the Exchange Act and SEC Rule 10b-5.
Issuance of Series A Redeemable Convertible Preferred Stock and Warrants
Stock Issued During Period, Value, New Issues
Assets of discontinued operations
us-gaap_DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent
Total non-current assets of discontinued operations
Accumulated deficit
Research and development
Warrant In Connection with Oxford Finance Loan Agreement [Member]
Represents information related to warrant in connection with Oxford finance loan agreement.
us-gaap_OperatingCostsAndExpensesAbstract
Operating Costs and Expenses [Abstract]
Money Market Funds [Member]
us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentNoncurrent
Property, plant and equipment, net
tlph_LicenseAgreementTerm
License Agreement, Term (Year)
The term of the license agreement, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
Weighted- Average Exercise Price (in dollars per share)
Exercisable at December 31, 2023 (in dollars per share)
Exercise price per share of warrants or rights exercisable during period.
Measurement Input, Share Price [Member]
Cash and Cash Equivalents [Axis]
us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentAssets
Other assets
Number of Warrants (in shares)
Exercisable at December 31, 2023 (in shares)
The number of warrants or rights exercisable.
Discontinued Operation [Member]
Represents discontinued operations
us-gaap_InterestExpense
Interest expense
Cash and Cash Equivalents [Domain]
Cash [Member]
us-gaap_InterestExpenseDebt
Interest Expense, Debt
tlph_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstanding
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Outstanding (in shares)
Represents the shared-based compensation arrangement by share-based payment award equity instrument other than options outstanding.
Measurement Input, Price Volatility [Member]
Changes in operating assets and liabilities:
Aguettant [Member]
Information related to Aguettant.
tlph_StockOptionPlanOptionReserveAnnualIncreaseAsPercentageOfOutstandingSharesAllowed
Stock Option Plan Option Reserve Annual Increase as Percentage of Outstanding Shares Allowed
Represents the stock option plan option reserve annual increase as percentage of outstanding shares allowed.
Measurement Input, Risk Free Interest Rate [Member]
tlph_DisposalGroupIncludingDiscontinuedOperationPercentageOfRoyaltyOnCommercialSales
Disposal Group, Including Discontinued Operation, Percentage of Royalty on Commercial Sales
Amount of royalty on commercial sales as a percentage for the disposal of assets and liabilities, including discontinued operation.
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
PFS Products [Member]
Information related to PFS products.
us-gaap_OtherNoncashIncomeExpense
Other
tlph_LicenseAgreementMilestonePaymentsToBePaidMaximum
License Agreement, Milestone Payments to be Paid, Maximum
Represents the maximum amount of milestone payments to be paid under license agreement.
Subsequent Event [Member]
Measurement Input, Expected Dividend Rate [Member]
Schedule of Cash and Cash Equivalents [Table Text Block]
Measurement Input, Expected Term [Member]
tlph_LicenseAgreementRenewalTerm
License Agreement, Renewal Term (Year)
The renewal term of the license agreement, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
tlph_DisposalGroupIncludingDiscontinuedOperationSellingGeneralAndAdministrativeExpense
Selling, general and administrative expense
Amount of selling, general and administrative expense attributable to disposal group, including, but not limited to, discontinued operation.
Cash and Cash Equivalents [Member]
Subsequent Event Type [Axis]
tlph_DisposalGroupIncludingDiscontinuedOperationResearchAndDevelopmentExpense
Research and development expenses
Amount of research and development expense attributable to disposal group, including, but not limited to, discontinued operation.
Subsequent Event Type [Domain]
tlph_DisposalGroupIncludingDiscontinuedOperationMaximumAmountInSalesbasedMilestone
Disposal Group, Including Discontinued Operation, Maximum Amount in Sales-based Milestone
Maximum amount in sales-based milestone for the disposal of assets and liabilities, including discontinued operation.
tlph_LicenseAgreementMinimumSalesObligationTerm
License Agreement, Minimum Sales Obligation Term (Month)
Represents the minimum sales obligation term under license agreement, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
Retirement Benefits [Text Block]
Subsequent Events [Text Block]
tlph_DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilitiesCurrent
Operating lease liabilities, current portion
Amount classified as operating lease liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.
tlph_DisposalGroupIncludingDiscontinuedOperationOperatingLeaseRightOfUseAssetsNoncurrent
Operating lease right-of-use assets
Amount of operating lease right of use assets classified as noncurrent attributable to disposal group held for sale or disposed of.
tlph_DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilitiesNoncurrent
Operating lease liabilities, net of current portion
Amount classified as Operating lease liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of beyond one year or the normal operating cycle, if longer.
In-license Agreement [Text Block]
The entire disclosure for in-license agreement.
tlph_DisposalGroupIncludingDiscontinuedOperationNotePayableCurrent
Note payable, current portion
Amount classified as note payable attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.
Measurement Input Type [Axis]
Measurement Input Type [Domain]
Fair Value Measurement, Policy [Policy Text Block]
tlph_DiscontinuedOperationNetAssetsTransferred
Less: net assets transferred
Amount of net assets transferred for sale of discontinued operation.
tlph_DiscontinuedOperationExpectedDisposalCosts
Less: disposal costs
Amount of expected disposal costs for sale of discontinued operation.
tlph_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExercised
Exercised, warrants, exercise price (in dollars per share)
Exercise price per share or per unit of warrants or rights exercised during the period.
Warrant Liability [Member]
Related to warrant liability.
tlph_ClassOfWarrantOrRightExercised
Exercised, warrants (in shares)
Class of Warrant or Right, Exercised (in shares)
Number of warrants or rights exercised during the period.
tlph_DisposalGroupIncludingDiscontinuedOperationNetAssets
Net assets (liabilities) of discontinued operations
Amount classified as net assets attributable to disposal group held for sale or disposed of.
Segment Reporting, Policy [Policy Text Block]
tlph_SharebasedCompensationDiscontinuedOperations
Stock-based compensation
Amount of share-based compensation attributable to discontinued operations.
Non-cash issuance costs for warrant liability
Non-cash Issuance Costs for Warrants
The amount of non-cash issuance costs for warrants.
AcelRx Common Stock [Member]
Represents AcelRx common stock.
Other assets
us-gaap_ShareBasedCompensation
Stock-based compensation
2021 Registered Direct Offering [Member]
Represents 2021 registered direct offering.
Business Combinations Policy [Policy Text Block]
Earnings Per Share, Policy [Policy Text Block]
Non-cash interest expense related to debt financing
Amortization of Debt Discount (Premium)
tlph_BusinessCombinationAcquireeCommonStockToBeHeldBackToSatisfySomeObligations
Business Combination, Acquiree Common Stock to Be Held Back to Satisfy Some Obligations (in shares)
Represents acquiree common stock to be held back to satisfy some obligations.
Discontinued Operations, Policy [Policy Text Block]
Income Tax, Policy [Policy Text Block]
Money market funds
November 2021 Financing Warrants [Member]
represents November 2021 Financing Warrants.
ATM Agreement [Member]
Represents information related to at the market agreement.
Exercise of pre-funded warrants (in shares)
Number of shares issued during the period due to warrants exercised.
tlph_DisposalGroupIncludingDiscontinuedOperationsPercentageOfSalesExcludingRoyaltyPayments
Disposal Group, Including Discontinued operations, Percentage of Sales, Excluding Royalty Payments
Percentage of sales excluding royalty payments for disposal group including discontinued operations
tlph_ClassOfWarrantOrRightRequiredPercentageOfOwnershipToBecomeExercisable
Class of Warrant or Right, Required Percentage of Ownership to Become Exercisable
Represents required percentage of ownership in order for warrants become exercisable.
tlph_AggregateOfferingPriceIncreaseDuringPeriod
Aggregate Offering Price, Increase During Period
Represents the aggregate offering price increase during period.
Exercise of pre-funded warrants
Value of stock issued during period because of warrants exercised.
tlph_BusinessCombinationAcquireeCommonStockToBeHeldBackToSatisfySomeObligationsFixedValuePerShare
Business Combination, Acquiree Common Stock to Be Held Back to Satisfy Some Obligations, Fixed Value per Share (in dollars per share)
Represents acquiree common stock to be held back to satisfy some obligations, fixed value per share.
tlph_AggregateOfferingPriceMaximum
Aggregate Offering Price, Maximum
Represents the maximum aggregate offering price.
Research and Development Expense, Policy [Policy Text Block]
Depreciation and amortization
Interest Expense, Policy [Policy Text Block]
Liabilities, fair value
tlph_DebtInstrumentCovenantMinimumRequiredUnrestirctedCash
Debt Instrument, Covenant, Minimum Required Unrestircted Cash
The minimum amount of unrestricted cash required to be maintained by the debt agreement.
Costs Associated with Exit or Disposal Activities or Restructurings, Policy [Policy Text Block]
us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares)
us-gaap_SharesIssuedPricePerShare
Shares Issued, Price Per Share (in dollars per share)
us-gaap_DepreciationAndAmortizationDiscontinuedOperations
Depreciation and amortization
us-gaap_AssetsCurrent
Total current assets
Cash and cash equivalent, fair value
Share-Based Payment Arrangement [Policy Text Block]
Equity [Text Block]
tlph_NoncashRoyaltyRevenueRelatedToRoyaltyMonetizationRealized
Non-cash royalty revenue
The amount of non-cash royalty revenue recognized in connection to royalty monetization that has been realized.
Assets of discontinued operations
Total current assets of discontinued operations
Common stock, $0.001 par value—200,000,000 shares authorized as of December 31, 2023 and 2022; 16,952,519 and 8,243,680 shares issued and outstanding as of December 31, 2023 and 2022, respectively
Impairment of net assets held for sale
Impairment of net assets held for sale
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Common Stock, Shares Authorized (in shares)
Common Stock, Shares Authorized (in shares)
us-gaap_DisposalGroupIncludingDiscontinuedOperationInventoryCurrent
Inventories
Impairment of property and equipment
Tangible Asset Impairment Charges
Commercial Paper [Member]
Common Stock, Shares, Issued (in shares)
us-gaap_DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsCurrent
Prepaid expenses and other current assets
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
Common Stock, Par or Stated Value Per Share (in dollars per share)
Common Stock, Par or Stated Value Per Share (in dollars per share)
us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount
us-gaap_DeferredTaxAssetsValuationAllowance
Valuation allowance
Statistical Measurement [Domain]
Maximum [Member]
Minimum [Member]
Weighted Average [Member]
Product and Service [Axis]
Product and Service [Domain]
Statistical Measurement [Axis]
Litigation Case [Axis]
Litigation Case [Domain]
us-gaap_DeferredTaxAssetsLiabilitiesNet
Net deferred tax assets
us-gaap_PreferredStockSharesIssued
Preferred Stock, Shares Issued (in shares)
Cash paid for interest
us-gaap_PreferredStockRedemptionAmount
Preferred Stock, Redemption Amount
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
us-gaap_DeferredTaxAssetsGross
Total deferred tax assets
us-gaap_PreferredStockSharesAuthorized
Preferred Stock, Shares Authorized (in shares)
us-gaap_DeferredIncomeTaxLiabilities
Total deferred tax liabilities
us-gaap_PreferredStockParOrStatedValuePerShare
Preferred Stock, Par or Stated Value Per Share (in dollars per share)
tlph_LicenseAgreementPercentOfRevenueSharePaymentToBePaid
License Agreement, Percent of Revenue Share Payment to be Paid
Represents the percentage of revenue share payments to be paid under license agreement.
Total revenue
Fair Value, Inputs, Level 3 [Member]
Section 59(e) R&D expenditures
Fair Value Hierarchy and NAV [Domain]
Customer [Axis]
Fair Value, Inputs, Level 1 [Member]
Customer [Domain]
Fair Value, Inputs, Level 2 [Member]
us-gaap_PreferredStockRedemptionPricePerShare
Preferred Stock, Redemption Price Per Share (in dollars per share)
Fair Value Hierarchy and NAV [Axis]
The 2020 Equity Incentive Plan [Member]
Related to the 2020 equity incentive plan.
Cash flows from operating activities:
Warrant liability
Warrants and Rights Outstanding
Revenue [Policy Text Block]
Statement [Line Items]
tlph_EffectiveIncomeTaxRateReconciliationAcquiredAssetsAmount
Acquired assets
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to acquired assets adjustments.
Additional paid-in capital
Total cash, cash equivalents, restricted cash and short-term investments
Short-term investments
us-gaap_StockholdersEquityAbstract
Equity, Attributable to Parent [Abstract]
Revaluation of warrant liability
Represents the Revaluation of 2022 Warrants Liability.
us-gaap_NonoperatingIncomeExpense
Total other income, net
Long-Lived Tangible Asset [Axis]
Long-Lived Tangible Asset [Domain]
Restricted cash
Net operating loss carryforward
Research credits
Current Assets:
Interest income and other income, net
tlph_LicensingAgreementMilestonePayments
Licensing Agreement, Milestone Payments
Represents licensing agreement, milestone payment liabilities.
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
Total cash, cash equivalents, and restricted cash
Total cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash—Beginning of period
Cash, cash equivalents and restricted cash—End of period
Assets
tlph_DiscontinuedOperationExpectedCashProceeds
Cash proceeds
Represents expected cash proceeds from discontinued operation.
Private Placement [Member]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net change in cash, cash equivalents and restricted cash
us-gaap_Liabilities
Total liabilities
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash (used in) provided by financing activities
Commitments and Contingencies
Sale of Stock [Axis]
Sale of Stock [Domain]
us-gaap_OperatingIncomeLoss
Loss from operations
Non-cash interest income on liability related to the sale of future royalties
The amount of non-cash interest expense recognized.
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash used in operating activities
us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation
Total liabilities of discontinued operations
Prepaid expenses and other current assets
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash provided by (used in) investing activities
Securities Purchase Agreement [Member]
Represents the Securities Purchase Agreement.
IP from Acquisition
tlph_ConsiderationPaidForTerminationOfRoyaltyMonetization
Consideration Paid for Termination of Royalty Monetization
Consideration paid for termination of Royalty Monetization
Amount of consideration paid for termination of Royalty Monetization.
tlph_NonCashGainOnTerminationOfLiabilityRelatedToSaleOfFutureRoyalties
Non-cash gain on extinguishment of liability related to the sale of future royalties
Non-cash Gain on Termination of Liability Related to Sale of Future Royalties
Amount of non-cash gain on termination of liability related to sale of future royalties.
Counterparty Name [Axis]
Counterparty Name [Domain]
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
Zalviso-related Assets [Member]
Represents Zalviso-related assets.
Other Liabilities [Table Text Block]
DSUVIA [Member]
Represents DSUVIA.
Net proceeds from issuance of common stock in connection with exercise of pre-funded warrants
The cash inflow from the issuance of common stock and exercise of warrants.
Proceeds from sale of future royalties
Net Proceeds from Sale of Future Royalties
Net proceeds from sale of future royalties.
Department of Defense [Member]
Represents department of defense.
tlph_SharebasedCompensationArrangementBySharebasedPaymentAwardNumberOfAdditionalSharesToBeAdded
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares to be Added (in shares)
Represents the number of additional shares that could be added from expired or cancelled shares already issued under another share-based payment plan.
us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
tlph_RoyaltyArrangmentMaximumPayments
Royalty Arrangment Maximum Payments
The capped amount of payments of company required to make to PDL.
tlph_ProceedsFromSaleOfRoyaltyAndMilestoneRights
Proceeds From Sale of Royalty and Milestone Rights
The amount of proceeds from the sale of royalty and milestone rights.
Marketable Securities, Policy [Policy Text Block]
tlph_EffectiveAnnualInterestRate
Effective Annual Interest Rate
Effective annual rate for a liability related to sale of future royalties.
us-gaap_PaymentsOfStockIssuanceCosts
Payments of Stock Issuance Costs
Concentration Risk, Credit Risk, Policy [Policy Text Block]
Investments and Fair Value Measurement Disclosure [Text Block]
The disclosure of investments and fair value measurement.
Payment of employee tax obligations related to vesting of restricted stock units
Accrued compensation and employee benefits
Marketable Securities [Member]
Represents marketable securities.
Disposal Group Classification [Axis]
Disposal Group Classification [Domain]
Total cash, cash equivalents, restricted cash and short-term investments, fair value
Represents fair value of cash, cash equivalents and short-term investments.
Exercise Price Range 5 [Member]
Related to the fifth exercise price range.
us-gaap_CostsAndExpenses
Total operating costs and expenses
us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Proceeds from Issuance or Sale of Equity
us-gaap_ProceedsFromIssuanceOfWarrants
Proceeds from Issuance of Warrants
Scenario [Domain]
Retained Earnings [Member]
us-gaap_ProceedsFromIssuanceOfPrivatePlacement
Proceeds from Issuance of Private Placement
Proceeds from issuance of common stock, accompanying warrants and pre-funded warrants in July 2023 private placement offering
Proceeds from Issuance of Common Stock
Scenario [Axis]
Net proceeds from issuance of common stock through equity plans
tlph_BusinessCombinationOptionsToPurchaseCapitalStockIssuedAndOutstandingCancelledExchangeForCommonStockNumber
Business Combination, Options To Purchase Capital Stock Issued and Outstanding Cancelled, Exchange for Common Stock, Number (in shares)
Represents options to purchase capital stock and all shares of stock issued and outstanding cancelled in exchange for right to receive common stock.
tlph_BusinessCombinationOptionsToPurchaseCapitalStockIssuedAndOutstandingCancelledExchangeForCash
Business Combination, Options To Purchase Capital Stock Issued and Outstanding Cancelled, Exchange for Cash
Value of options to purchase capital stock and all shares of capital stock issued and outstanding in exchange for cash.
Additional Paid-in Capital [Member]
Common Stock [Member]
Time-based Stock Option [Member]
Represents time-based stock option.
Preferred Stock [Member]
Equity Components [Axis]
Equity Component [Domain]
Net proceeds from issuance of Series A Redeemable Convertible Preferred Stock and Warrants
us-gaap_PaymentsForRepurchaseOfRedeemablePreferredStock
Redemption of Series A Redeemable Convertible Preferred Stock
us-gaap_LongTermDebt
Long-Term Debt
Warrant Exercise Price (in dollars per share)
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)
Outstanding at December 31, 2021 (in dollars per share)
Outstanding at December 31, 2022 (in dollars per share)
Class of Warrant or Right [Axis]
Class of Warrant or Right [Domain]
Number of Warrants (in shares)
Class of Warrant or Right, Outstanding (in shares)
Outstanding at December 31, 2021 (in shares)
Outstanding at December 31, 2022 (in shares)
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Net income (loss) before provision for income taxes
us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)
dei_IcfrAuditorAttestationFlag
ICFR Auditor Attestation Flag
State and Local Jurisdiction [Member]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Domestic Tax Authority [Member]
us-gaap_RepaymentsOfLongTermDebt
Payment of long-term debt
Document Annual Report
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]
Entity Incorporation, State or Country Code
us-gaap_UnrecognizedTaxBenefits
Unrecognized benefit—beginning of period
Unrecognized benefit—end of period
Accounting Policies [Abstract]
us-gaap_OpenTaxYear
Open Tax Year
Document Transition Report
dei_DocumentFinStmtErrorCorrectionFlag
Document Financial Statement Error Correction [Flag]
Basis of Accounting, Policy [Policy Text Block]
Selling, General and Administrative Expenses [Member]
dei_EntityInteractiveDataCurrent
Entity Interactive Data Current
Gross increases—prior period tax positions
Security Exchange Name
Gross increases—current period tax positions
Title of 12(b) Security
Net proceeds from issuance of common stock and warrants in connection with equity financings (in shares)
Number of new stock and warrants issued during the period.
Net proceeds from issuance of common stock and warrants in connection with equity financings
Equity impact of the value of new stock and warrants issued during the period. Includes shares issued in an initial public offering or a secondary public offering.
Research and Development Expense [Member]
Income Statement Location [Axis]
Income Statement Location [Domain]
Collaborative Arrangement and Arrangement Other than Collaborative [Axis]
tlph_PlacementAgentFeePercentageOfGrossProceedsOfPrivatePlacement
Placement Agent Fee, Percentage of Gross Proceeds of Private Placement
Percentage of gross proceeds for placement agent fee in private placement.
Warrants Disclosure [Text Block]
The disclosure of warrants.
Liability Related To Sale Of Future Royalties Disclosure [Text Block]
The entire disclosure for liability related to sale of future royalties.
H.C. Wainwright & Co., LLC [Member]
Represents H.C. Wainwright & Co., LLC.
Tax Period [Domain]
Discontinued Operations [Member]
Series A and B Common Stock Warrants [Member]
Relating to Series A and B Common Stock Warrants.
dei_AuditorName
Auditor Name
tlph_ImpairmentReversalChargeOnReclassifiedAssets
Impairment of net assets held for sale
For the asset that is reclassified back to held and used from held-for-sale, the amount of impairment charge (reversal) that is recognized on the reclassification date.
Tax Period [Axis]
tlph_PlacementAgentFeeMinimumProceedsRequiredForFullOnetimePayment
Placement Agent Fee, Minimum Proceeds Required for Full One-time Payment
Amount of minimum proceeds required for full on-time payment for placement agent fee.
Granted, warrants, exercise price (in dollars per share)
Represents the exercise price of warrants or rights issued during the period.
dei_AuditorFirmId
Auditor Firm ID
Granted, warrants (in shares)
Represents the number of warrants or rights issued during the period.
tlph_SaleOfEquityPricePerShareAndWarrant
Sale of Equity, Price Per Share and Warrant (in dollars per share)
Per share or per unit price of share and warrant issued in sale of equity.
dei_AuditorLocation
Auditor Location
The 2023 Prefunded Warrants [Member]
Relating to the 2023 Prefunded Warrants.
us-gaap_TaxCreditCarryforwardAmount
Tax Credit Carryforward, Amount
Research Tax Credit Carryforward [Member]
ESPP, RSUs and stock options to purchase common stock (in shares)
Shares used in computing net (loss) income per share of common stock, diluted – See Note 12 (in shares)
Weighted average shares outstanding — diluted (in shares)
us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredRevenueNoncurrent
Deferred revenue, net of current portion
Modification of equity-classified warrants
Amount of increase (decrease) in additional paid in capital (APIC) resulting from the modification of warrants.
us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredRevenueCurrent
Deferred revenue, current portion
Tax Credit Carryforward [Axis]
Tax Credit Carryforward, Name [Domain]
Equity issuance costs from modification of November 2021 Financing Warrants
Equity Issuance Costs, Modification of Warrants
Represents the amount of modification of warrants for equity issuance costs.
us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayableCurrent
Accounts payable
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
Equity issuance costs in accounts payable and accrued expenses
Amount of equity issuance costs in accounts payable and accrued expenses.
us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent
Accrued liabilities
Asset Class [Axis]
Asset Class [Domain]
Statement [Table]
Loss from discontinued operations (in dollars per share)
us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
Loss from discontinued operations, diluted (in dollars per share)
Statement of Financial Position [Abstract]
us-gaap_EarningsPerShareDiluted
Net (loss) income per share (in dollars per share)
Weighted average shares outstanding — basic (in shares)
Shares used in computing net (loss) income per share of common stock, basic – See Note 12 (in shares)
us-gaap_EarningsPerShareDilutedAbstract
Earnings Per Share, Diluted [Abstract]
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
(Loss) income from continuing operations (in dollars per share)
us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Income (loss) from continuing operations, diluted (in dollars per share)
us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense
Interest expense
Loss from discontinued operations (in dollars per share)
Loss from discontinued operations, basic (in dollars per share)
us-gaap_EarningsPerShareBasic
Net income (loss) per share of common stock, basic (in dollars per share)
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
(Loss) income from continuing operations (in dollars per share)
Income (loss) from continuing operations, basic (in dollars per share)
us-gaap_EarningsPerShareBasicAbstract
Earnings Per Share, Basic [Abstract]
us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
Total revenues
tlph_PercentageOfRoyaltiesAndRightsUnderAgreement
Percentage of Royalties and Rights Under Agreement
Percentage of royalties or milestone rights to be received under the agreement.
Statement of Cash Flows [Abstract]
Exercise Price Range 6 [Member]
Related to the sixth exercise price range.
us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold
Cost of goods sold
First Four Commercial Milestones [Member]
Represents the detail of parts of royalties and rights received.
AcelRX [Member]
The entity AcelRX.
Statement of Stockholders' Equity [Abstract]
July 2023 Private Placement Offering [Member]
Relating to the July 2023 Private Placement Offering.
tlph_CommercialMilestonesValueMaximumAmountAvailable
Commercial Milestones Value Maximum Amount Available
The maximum value of commercial milestone payments available to the company.
Income Statement [Abstract]
Disposal Groups, Including Discontinued Operations [Table Text Block]
Disposal Group Name [Axis]
Disposal Group Name [Domain]
us-gaap_BusinessCombinationContingentConsiderationLiability
Business Combination, Contingent Consideration, Liability
Schedule of Accrued Liabilities [Table Text Block]
us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
Business Acquisition, Transaction Costs
us-gaap_RepaymentsOfDebt
Repayments of Debt
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Tax Years 2018 to 2022 [Member]
Relating to tax years 2018 to 2022.
us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedPeriodPercent
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent
us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)
Section 174 R&D expenditures
Amount before allocation of valuation allowances of deferred tax asset attributable to capitalized research and development.
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
tlph_StockSharesAuthorized
Stock, Shares Authorized (in shares)
Represents the amount of shares of stock, common and preferred, authorized.
tlph_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToParentBeforeInterest
Loss from discontinued operations
Amount after tax of income (loss) from a discontinued operation attributable to the parent before interest income (expense). Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.
2011 Equity Incentive Plan [Member]
The name or description of the plan.
Liabilities of discontinued operations
us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent
Total non-current liabilities of discontinued operations
us-gaap_IncomeTaxReconciliationOtherAdjustments
Other
CASH FLOWS FROM FINANCING ACTIVITIES:
Other long-term liabilities
Change in valuation allowance
Warrants Exercise Price One [Member]
Relating to warrants in the first exercise price bracket.
Weighted- Average Remaining Contractual Life (Years) (Year)
Represents the weighted average contractual term remaining for warrants.
tlph_LicensingAgreementComplementaryPayment
Licensing Agreement, Complementary Payment
Amount of complementary payment to be received as part of a licensing agreement.
Warrants Exercise Price Three [Member]
Relating to the third exercise price bracket for warrants.
Warrants Exercise Price Two [Member]
Relating to the second exercise price bracket for warrants.
Non-cash gain on extinguishment of liability related to the sale of future royalties
Gain on extinguishment of liability related to sale of future royalties
Amount of gain on termination of liability related to sale of future royalties.
Schedule of Warrants by Exercise Price [Table Text Block]
Tabular disclosure of the company's warrants by exercise price.
Modified November 2021 Warrants [Member]
Relating to modified November 2021 Warrants.
Exercise Price Range 7 [Member]
Relating to the seventh exercise price range.
Redeemable Convertible Preferred Stock [Member]
Exercise Price Range 8 [Member]
Relating to the eighth exercise price range.
Exercise Price Range 9 [Member]
Relating to the ninth exercise price range.
Warrants Exercise Price Five [Member]
Relating to the fifth exercise price bracket for warrants.
December 2022 Financing [Member]
Relating to the December 2022 Financing.
Warrants Exercise Price Four [Member]
Relating to the fourth exercise price bracket for warrants.
us-gaap_StockholdersEquity
Total stockholders’ equity
Balance
Balance
The 2022 Prefunded Warrants [Member]
Relating to the 2022 prefunded warrants.
Common Warrants [Member]
Relating to common warrants.
Warrants Exercise Price Six [Member]
Relating to the sixth exercise price bracket for warrants.
us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Cash paid for asset acquisition, net of cash acquired
tlph_ProceedsFromSaleOfReceivables
Proceeds From Sale of Receivables
Represents the cash inflow from sale of receivables.
tlph_SaleOfEquitySharePriceMilestone
Sale of Equity, Share Price Milestone (in dollars per share)
Represents the share price milestone for a sale of equity.
XOMA [Member]
Relating to XOMA.
Class of Stock [Axis]
Revaluation of Put Option Liability
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revaluation of put liability.
Class of Stock [Domain]
us-gaap_CashAcquiredFromAcquisition
Cash Acquired from Acquisition
Cash acquired
Stock options
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
us-gaap_PaymentsToAcquireBusinessesGross
Payments to Acquire Businesses, Gross
tlph_LiabilityRelatedToSaleOfFutureRoyaltiesNet
Liability related to sale of future royalties as of December 31, 2022
The amount of liability related to sale of future royalties less current portion.
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets
tlph_EquityOfferingPricePerUnit
Equity Offering, Price Per Unit (in dollars per share)
Represents the price per unit in an equity offering.
Gross Unrealized Gains
tlph_ProceedsFromIssuanceOrSaleOfEquityAfterWarrantAdjustment
Proceeds from Issuance or Sale of Equity, After Warrant Adjustment
Represents the amount of proceeds from issuance or sale of equity after warrant adjustments.
Pivotal Trial Milestone [Member]
Relating to the pivotal trial milestone.
Pivotal Share Price Milestone [Member]
Relating to the pivotal share price milestone.
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit
Short-term investment, amortized Cost
SWK [Member]
Represents SWK.
Exercise Price Range [Axis]
State tax—net of federal benefit
Exercise Price Range [Domain]
Fair value of warrants issued to placement agent
Represents the cash flow impact of warrants issued.
Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit