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Estimated Fair Value Debt securities, available for sale Debt Securities, Available-for-Sale Raw materials Inventory, Raw Materials, Gross Gross Unrealized Gain Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Purchases of intangible assets and strategic investments Payments To Acquire Intangible Assets And Strategic Investments Payments To Acquire Intangible Assets And Strategic Investments Common stock (in shares) Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Adjustments to reconcile net loss to net cash provided by (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Interest income and other, net Interest and Other Income Intangible costs in accounts payable and other long-term liabilities Intangible Costs In Other Current And Other Long-Term Liabilities Intangible Costs In Other Current And Other Long-Term Liabilities Provision for expected credit losses Provision for expected credit losses Accounts Receivable, Credit Loss Expense (Reversal) Convertible senior notes (if-converted) Shares reserved for issuance upon conversion of Convertible Senior Notes Convertible Debt Securities [Member] Development Milestones Development Milestones [Member] Development Milestones [Member] Vesting of restricted stock units, net of shares withheld for taxes Stock Issued During Period, Value, Restricted Stock Award, Gross Subsequent Event Type [Axis] Subsequent Event Type [Axis] Convertible senior notes Convertible Senior Notes [Member] Convertible Senior Notes [Member] Increase in monthly base rent Lessee, Operating Lease, Monthly Increase In Base Rent Lessee, Operating Lease, Monthly Increase In Base Rent Convertible senior notes Convertible Debt [Member] Prepaid and other current assets Prepaid Expense and Other Assets, Current Work-in-process Inventory, Work in Process, Gross Less: allowance for credit losses Balance at beginning of the period Balance at end of the period Accounts Receivable, Allowance for Credit Loss One to Two Years Debt Securities, Available-For-Sale, Fair Value, Maturity, Allocated And Single Maturity Date, After Year One Through Two Debt Securities, Available-For-Sale, Fair Value, Maturity, Allocated And Single Maturity Date, After Year One Through Two Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Entity Registrant Name Entity Registrant Name Cash Cash Equivalents And Short Term Investments [Line Items] Cash Cash Equivalents And Short Term Investments [Line Items] Cash cash equivalents and short term investments. Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Cost of sales Cost of Sales [Member] Lease Contractual Term [Axis] Lease Contractual Term [Axis] Document Period End Date Document Period End Date Revenue from Contract with Customer Benchmark Revenue from Contract with Customer Benchmark [Member] Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Entity Central Index Key Entity Central Index Key Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Total stock-based compensation expense Share-Based Payment Arrangement, Expense Debt instrument, initial cap price per share (in dollars per share) Option Indexed To Issuers Equity, Cap Price Option Indexed To Issuers Equity Cap Price Income tax expense Income tax expense (benefit) Income Tax Expense (Benefit) Outside the United States Non-US [Member] Write-offs and adjustments, net of recoveries Accounts Receivable, Allowance for Credit Loss, Writeoff Write-off of fixed assets Impairment of Leasehold Employee-related liabilities Employee-related Liabilities, Current Vesting [Axis] Vesting [Axis] Fair Value Measurements Fair Value Disclosures [Text Block] Number of operating segments Number of Operating Segments Award Date Award Date [Axis] Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Equity [Abstract] Equity [Abstract] Weighted-average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Sales Total Sales Revenue from Contract with Customer, Excluding Assessed Tax Insulin Pump Insulin Pump [Member] Insulin pump. Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Weighted-average discount rate used to determine operating lease liabilities Operating Lease, Weighted Average Discount Rate, Percent Within One Year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Credit Facility [Domain] Credit Facility [Domain] Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Weighted average shares used to compute diluted net loss per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Operating expenses: Operating Expenses [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Additional paid-in capital Additional Paid in Capital, Common Stock Additional Paid-in Capital Additional Paid-in Capital [Member] Total assets Assets Monthly base rent Lessee, Operating Lease, Monthly Base Rent Lessee, Operating Lease, Monthly Base Rent Cover [Abstract] Cover [Abstract] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Amortization of debt issuance costs Amortization of Debt Issuance Costs United States UNITED STATES Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Other long-term liabilities Other Liabilities, Noncurrent Total future minimum lease payments Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Short-term investments Short-Term Investments Employee Benefits Compensation and Employee Benefit Plans [Text Block] Asset acquisition, purchase price Asset Acquisition, Consideration Transferred Total operating expenses Operating Expenses Business Segment and Geographic Information Segment Reporting Disclosure [Text Block] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Date of Offering Date Of Offering [Member] Date of offering. Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Operating lease extension period Lessee, Operating Lease, Renewal Term Equity Component [Domain] Equity Component [Domain] Purchase price of common stock on date of purchase Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent Long term debt assumed Asset Acquisition, Liabilities, Long Term Debt Assumed Asset Acquisition, Liabilities, Long Term Debt Assumed Debt Instrument [Line Items] Debt Instrument [Line Items] Scenario [Axis] Scenario [Axis] Weighted average shares used to compute basic net loss per share (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Concentration Risk Type Concentration Risk Type [Domain] Operating loss Operating Income (Loss) Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Concentration Risk Benchmark Concentration Risk Benchmark [Axis] Number of investments held by the company Number Of Investments Held By The Company Number Of Investments Held By The Company Statement [Line Items] Statement [Line Items] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Scenario [Domain] Scenario [Domain] Outstanding borrowings Long-Term Line of Credit Guarantee liability current Guarantor Obligations, Current Carrying Value Additional earnout payment Asset Acquisition, Contingent Consideration Arrangements, Range of Outcomes, Value, High Asset Acquisition, Contingent Consideration Arrangements, Range of Outcomes, Value, High Other long-term liabilities Product Warranty Accrual, Noncurrent Schedule of Shares of Common Stock Reserved for Future Issuance Schedule Of Common Stock Reserved For Future Issuance [Table Text Block] Schedule of common stock reserved for future issuance. Tranche One Share-Based Payment Arrangement, Tranche One [Member]