3.7.0.1 html 102 160 1 false 31 0 false 4 false false R1.htm 100000 - Document - Document and Entity Information Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 100010 - Statement - Condensed Consolidated Balance Sheets Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/StatementCondensedConsolidatedBalanceSheets Condensed Consolidated Balance Sheets Statements 2 false false R3.htm 100020 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsParenthetical Condensed Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 100030 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/StatementCondensedConsolidatedStatementsOfOperationsAndComprehensiveLossUnaudited Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) Statements 4 false false R5.htm 100040 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/StatementCondensedConsolidatedStatementsOfCashFlowsUnaudited Condensed Consolidated Statements of Cash Flows (Unaudited) Statements 5 false false R6.htm 100050 - Disclosure - Organization and Summary of Significant Accounting Policies Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPolicies Organization and Summary of Significant Accounting Policies Notes 6 false false R7.htm 100060 - Disclosure - Net Income (Loss) Per Share Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureNetIncomeLossPerShare Net Income (Loss) Per Share Notes 7 false false R8.htm 100070 - Disclosure - Merger Agreement with Molecular Templates Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureMergerAgreementWithMolecularTemplates Merger Agreement with Molecular Templates Notes 8 false false R9.htm 100080 - Disclosure - Agreement with OBI Pharma Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureAgreementWithOBIPharma Agreement with OBI Pharma Notes 9 false false R10.htm 100090 - Disclosure - Stockholders' Equity Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockholdersEquity Stockholders' Equity Notes 10 false false R11.htm 100100 - Disclosure - Stock Based Compensation Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockBasedCompensation Stock Based Compensation Notes 11 false false R12.htm 100110 - Disclosure - Marketable Securities and Fair Value Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureMarketableSecuritiesAndFairValue Marketable Securities and Fair Value Notes 12 false false R13.htm 100120 - Disclosure - Commitments and Contingencies Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureCommitmentsAndContingencies Commitments and Contingencies Notes 13 false false R14.htm 100130 - Disclosure - Organization and Summary of Significant Accounting Policies (Policies) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesPolicies Organization and Summary of Significant Accounting Policies (Policies) Policies http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPolicies 14 false false R15.htm 100140 - Disclosure - Net Income (Loss) Per Share (Tables) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureNetIncomeLossPerShareTables Net Income (Loss) Per Share (Tables) Tables http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureNetIncomeLossPerShare 15 false false R16.htm 100150 - Disclosure - Stockholders' Equity (Tables) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockholdersEquityTables Stockholders' Equity (Tables) Tables http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockholdersEquity 16 false false R17.htm 100160 - Disclosure - Stock Based Compensation (Tables) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockBasedCompensationTables Stock Based Compensation (Tables) Tables http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockBasedCompensation 17 false false R18.htm 100170 - Disclosure - Marketable Securities and Fair Value (Tables) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureMarketableSecuritiesAndFairValueTables Marketable Securities and Fair Value (Tables) Tables http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureMarketableSecuritiesAndFairValue 18 false false R19.htm 100180 - Disclosure - Net Income (Loss) Per Share - Reconciliation of Numerator and Denominator (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureNetIncomeLossPerShareReconciliationOfNumeratorAndDenominatorDetail Net Income (Loss) Per Share - Reconciliation of Numerator and Denominator (Detail) Details http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureNetIncomeLossPerShareTables 19 false false R20.htm 100190 - Disclosure - Net Income (Loss) Per Share - Warrants, Options and Purchase Rights Excluded from Computation of Diluted Net Loss Per Share (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureNetIncomeLossPerShareWarrantsOptionsAndPurchaseRightsExcludedFromComputationOfDilutedNetLossPerShareDetail Net Income (Loss) Per Share - Warrants, Options and Purchase Rights Excluded from Computation of Diluted Net Loss Per Share (Detail) Details http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureNetIncomeLossPerShareTables 20 false false R21.htm 100200 - Disclosure - Merger Agreement with Molecular Templates - Additional Information (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureMergerAgreementWithMolecularTemplatesAdditionalInformationDetail Merger Agreement with Molecular Templates - Additional Information (Detail) Details 21 false false R22.htm 100210 - Disclosure - Agreement with OBI Pharma - Additional Information (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureAgreementWithOBIPharmaAdditionalInformationDetail Agreement with OBI Pharma - Additional Information (Detail) Details 22 false false R23.htm 100220 - Disclosure - Stockholders' Equity - Additional Information (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetail Stockholders' Equity - Additional Information (Detail) Details 23 false false R24.htm 100230 - Disclosure - Stockholders' Equity - Outstanding Warrants Valuation Assumption (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockholdersEquityOutstandingWarrantsValuationAssumptionDetail Stockholders' Equity - Outstanding Warrants Valuation Assumption (Detail) Details 24 false false R25.htm 100240 - Disclosure - Stockholders' Equity - Financial Liabilities Subject to Fair Value Measurements (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockholdersEquityFinancialLiabilitiesSubjectToFairValueMeasurementsDetail Stockholders' Equity - Financial Liabilities Subject to Fair Value Measurements (Detail) Details 25 false false R26.htm 100250 - Disclosure - Stockholders' Equity - Reconciliation of Warrant Liability Measured at Fair Value (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockholdersEquityReconciliationOfWarrantLiabilityMeasuredAtFairValueDetail Stockholders' Equity - Reconciliation of Warrant Liability Measured at Fair Value (Detail) Details 26 false false R27.htm 100260 - Disclosure - Stock Based Compensation - Stock-Based Compensation Expense (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockBasedCompensationStockBasedCompensationExpenseDetail Stock Based Compensation - Stock-Based Compensation Expense (Detail) Details 27 false false R28.htm 100270 - Disclosure - Stock Based Compensation - Weighted-Average Fair Value Valuation Assumptions (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockBasedCompensationWeightedAverageFairValueValuationAssumptionsDetail Stock Based Compensation - Weighted-Average Fair Value Valuation Assumptions (Detail) Details 28 false false R29.htm 100280 - Disclosure - Stock Based Compensation - Additional Information (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail Stock Based Compensation - Additional Information (Detail) Details 29 false false R30.htm 100290 - Disclosure - Stock Based Compensation - Stock Option Activity Under Equity Incentive Plan (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureStockBasedCompensationStockOptionActivityUnderEquityIncentivePlanDetail Stock Based Compensation - Stock Option Activity Under Equity Incentive Plan (Detail) Details 30 false false R31.htm 100300 - Disclosure - Marketable Securities and Fair Value - Financial Assets at Fair Value on Recurring Basis (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureMarketableSecuritiesAndFairValueFinancialAssetsAtFairValueOnRecurringBasisDetail Marketable Securities and Fair Value - Financial Assets at Fair Value on Recurring Basis (Detail) Details 31 false false R32.htm 100310 - Disclosure - Marketable Securities and Fair Value - Summary of Company's Available-for-Sale Securities (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureMarketableSecuritiesAndFairValueSummaryOfCompanySAvailableForSaleSecuritiesDetail Marketable Securities and Fair Value - Summary of Company's Available-for-Sale Securities (Detail) Details 32 false false R33.htm 100320 - Disclosure - Marketable Securities and Fair Value - Additional Information (Detail) Sheet http://www.thresholdpharm.com/20170630/taxonomy/role/DisclosureMarketableSecuritiesAndFairValueAdditionalInformationDetail Marketable Securities and Fair Value - Additional Information (Detail) Details 33 false false All Reports Book All Reports thld-20170630.xml thld-20170630.xsd thld-20170630_cal.xml thld-20170630_def.xml thld-20170630_lab.xml thld-20170630_pre.xml true true