3.4.0.3 html 64 170 1 false 27 0 false 5 false false R1.htm 0001000 - Document - Document and Entity Information Sheet http://www.dexcom.com/role/DocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 1001000 - Statement - Consolidated Balance Sheets Sheet http://www.dexcom.com/role/ConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 1001501 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://www.dexcom.com/role/ConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 1002000 - Statement - Consolidated Statements of Operations Sheet http://www.dexcom.com/role/ConsolidatedStatementsOfOperations Consolidated Statements of Operations Statements 4 false false R5.htm 1003000 - Statement - Consolidated Statements of Comprehensive Loss Sheet http://www.dexcom.com/role/ConsolidatedStatementsOfComprehensiveLoss Consolidated Statements of Comprehensive Loss Statements 5 false false R6.htm 1004000 - Statement - Consolidated Statements of Cash Flows Sheet http://www.dexcom.com/role/ConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows Statements 6 false false R7.htm 2101100 - Disclosure - Organization and Summary of Significant Accounting Policies Sheet http://www.dexcom.com/role/OrganizationAndSummaryOfSignificantAccountingPolicies Organization and Summary of Significant Accounting Policies Notes 7 false false R8.htm 2102100 - Disclosure - Financial Statement Details Sheet http://www.dexcom.com/role/FinancialStatementDetails Financial Statement Details Notes 8 false false R9.htm 2103100 - Disclosure - Net Loss Per Common Share Sheet http://www.dexcom.com/role/NetLossPerCommonShare Net Loss Per Common Share Notes 9 false false R10.htm 2104100 - Disclosure - Commitments and Contingencies Sheet http://www.dexcom.com/role/CommitmentsAndContingencies Commitments and Contingencies Notes 10 false false R11.htm 2105100 - Disclosure - Development and Other Agreements Sheet http://www.dexcom.com/role/DevelopmentAndOtherAgreements Development and Other Agreements Notes 11 false false R12.htm 2106100 - Disclosure - Fair Value Measurements Sheet http://www.dexcom.com/role/FairValueMeasurements Fair Value Measurements Notes 12 false false R13.htm 2201201 - Disclosure - Organization and Summary of Significant Accounting Policies (Policies) Sheet http://www.dexcom.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesPolicies Organization and Summary of Significant Accounting Policies (Policies) Policies http://www.dexcom.com/role/OrganizationAndSummaryOfSignificantAccountingPolicies 13 false false R14.htm 2302301 - Disclosure - Financial Statement Details (Tables) Sheet http://www.dexcom.com/role/FinancialStatementDetailsTables Financial Statement Details (Tables) Tables http://www.dexcom.com/role/FinancialStatementDetails 14 false false R15.htm 2303301 - Disclosure - Net Loss Per Common Share (Tables) Sheet http://www.dexcom.com/role/NetLossPerCommonShareTables Net Loss Per Common Share (Tables) Tables http://www.dexcom.com/role/NetLossPerCommonShare 15 false false R16.htm 2304301 - Disclosure - Commitments and Contingencies (Tables) Sheet http://www.dexcom.com/role/CommitmentsAndContingenciesTables Commitments and Contingencies (Tables) Tables http://www.dexcom.com/role/CommitmentsAndContingencies 16 false false R17.htm 2306301 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.dexcom.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.dexcom.com/role/FairValueMeasurements 17 false false R18.htm 2307301 - Disclosure - Subsequent Events (Tables) Sheet http://www.dexcom.com/role/SubsequentEventsTables Subsequent Events (Tables) Tables 18 false false R19.htm 2401402 - Disclosure - Organization and Summary of Significant Accounting Policies - Additional Information (Detail) Sheet http://www.dexcom.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail Organization and Summary of Significant Accounting Policies - Additional Information (Detail) Details 19 false false R20.htm 2402402 - Disclosure - Financial Statement Details - Short Term Marketable Securities, Available for Sale (Detail) Sheet http://www.dexcom.com/role/FinancialStatementDetailsShortTermMarketableSecuritiesAvailableForSaleDetail Financial Statement Details - Short Term Marketable Securities, Available for Sale (Detail) Details 20 false false R21.htm 2402403 - Disclosure - Financial Statement Details - Inventory (Detail) Sheet http://www.dexcom.com/role/FinancialStatementDetailsInventoryDetail Financial Statement Details - Inventory (Detail) Details 21 false false R22.htm 2402404 - Disclosure - Financial Statement Details - Accounts Payable and Accrued Liabilities (Detail) Sheet http://www.dexcom.com/role/FinancialStatementDetailsAccountsPayableAndAccruedLiabilitiesDetail Financial Statement Details - Accounts Payable and Accrued Liabilities (Detail) Details 22 false false R23.htm 2402405 - Disclosure - Financial Statement Details - Accrued Warranty (Detail) Sheet http://www.dexcom.com/role/FinancialStatementDetailsAccruedWarrantyDetail Financial Statement Details - Accrued Warranty (Detail) Details 23 false false R24.htm 2403402 - Disclosure - Net Loss Per Common Share Net Loss per Common Share - Basic and Diluted Net Loss per Share (Details) Sheet http://www.dexcom.com/role/NetLossPerCommonShareNetLossPerCommonShareBasicAndDilutedNetLossPerShareDetails Net Loss Per Common Share Net Loss per Common Share - Basic and Diluted Net Loss per Share (Details) Details 24 false false R25.htm 2403403 - Disclosure - Net Loss Per Common Share - Historical Outstanding Anti-Dilutive Securities (Detail) Sheet http://www.dexcom.com/role/NetLossPerCommonShareHistoricalOutstandingAntiDilutiveSecuritiesDetail Net Loss Per Common Share - Historical Outstanding Anti-Dilutive Securities (Detail) Details 25 false false R26.htm 2404402 - Disclosure - Commitments and Contingencies - Long-Term Debt and PO Commitments (Detail) Sheet http://www.dexcom.com/role/CommitmentsAndContingenciesLongTermDebtAndPoCommitmentsDetail Commitments and Contingencies - Long-Term Debt and PO Commitments (Detail) Details 26 false false R27.htm 2404403 - Disclosure - Commitments and Contingencies - Rental Obligations (Detail) Sheet http://www.dexcom.com/role/CommitmentsAndContingenciesRentalObligationsDetail Commitments and Contingencies - Rental Obligations (Detail) Details 27 false false R28.htm 2405401 - Disclosure - Development and Other Agreements - Additional Information (Detail) Sheet http://www.dexcom.com/role/DevelopmentAndOtherAgreementsAdditionalInformationDetail Development and Other Agreements - Additional Information (Detail) Details 28 false false R29.htm 2406402 - Disclosure - Fair Value Measurements (Details) Sheet http://www.dexcom.com/role/FairValueMeasurementsDetails Fair Value Measurements (Details) Details http://www.dexcom.com/role/FairValueMeasurementsTables 29 false false All Reports Book All Reports dxcm-20160331.xml dxcm-20160331.xsd dxcm-20160331_cal.xml dxcm-20160331_def.xml dxcm-20160331_lab.xml dxcm-20160331_pre.xml true true