$TNDM
TANDEM DIABETES CARE INC Stock $tndm

$tndm Overview Financials Valuation SEC Filings Company Website

2020 Q1 Form 10-K Financial Statement

#000143813320000014 Filed on February 24, 2020

Income Statement

Concept	2020 Q1	2019 Q4	2018 Q4
Revenue	$97.93M	$108.4M	$76.20M
YoY Change	48.38%	42.26%	89.11%
Cost Of Revenue	$47.67M	$48.10M	$34.70M
YoY Change	46.02%	38.62%	52.19%
Gross Profit	$50.26M	$60.27M	$41.54M
YoY Change	50.69%	45.11%	137.78%
Gross Profit Margin	51.33%	55.6%	54.51%
Selling, General & Admin	$49.72M	$45.60M	$32.20M
YoY Change	42.21%	41.61%	51.17%
% of Gross Profit	98.92%	75.66%	77.52%
Research & Development	$14.12M	$12.60M	$8.800M
YoY Change	50.36%	43.18%	51.72%
% of Gross Profit	28.09%	20.91%	21.19%
Depreciation & Amortization	$1.830M	$1.640M	$1.470M
YoY Change	27.26%	11.56%	-30.99%
% of Gross Profit	3.64%	2.72%	3.54%
Operating Expenses	$63.83M	$58.13M	$40.98M
YoY Change	43.93%	41.86%	51.48%
Operating Profit	-$13.57M	$2.144M	$560.0K
YoY Change	23.42%	282.86%	-105.84%
Interest Expense	-$1.200M	$600.0K	$3.200M
YoY Change	-90.0%	-81.25%	-277.78%
% of Operating Profit		27.99%	571.43%
Other Income/Expense, Net	-$1.196M
YoY Change	-90.03%
Pretax Income	-$14.80M	$2.700M	$3.700M
YoY Change	-35.65%	-27.03%	-132.46%
Income Tax	$100.0K	$100.0K	$100.0K
% Of Pretax Income		3.7%	2.7%
Net Earnings	-$14.87M	$2.652M	$3.686M
YoY Change	-35.34%	-28.05%	-132.32%
Net Earnings / Revenue	-15.18%	2.45%	4.84%
Basic Earnings Per Share	-$0.25	$0.04	$0.06
Diluted Earnings Per Share	-$0.25	$0.04	$0.02
COMMON SHARES
Basic Shares Outstanding	59.73M shares	59.22M shares
Diluted Shares Outstanding		62.88M shares

Balance Sheet

Concept	2020 Q1	2019 Q4	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$160.2M	$176.5M	$129.0M
YoY Change	27.55%	36.76%	808.64%
Cash & Equivalents	$74.49M	$51.18M	$41.83M
Short-Term Investments	$85.70M	$125.3M	$87.20M
Other Short-Term Assets	$6.200M	$4.000M	$3.800M
YoY Change	34.78%	5.26%	72.73%
Inventory	$60.47M	$49.07M	$19.90M
Prepaid Expenses
Receivables	$53.96M	$46.59M	$35.19M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$280.9M	$276.1M	$187.9M
YoY Change	51.01%	46.97%	192.86%
LONG-TERM ASSETS
Property, Plant & Equipment	$37.63M	$32.92M	$17.15M
YoY Change	37.82%	91.96%	-12.63%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$1.814M	$1.485M	$1.258M
YoY Change	353.5%	18.04%	1133.33%
Total Long-Term Assets	$62.45M	$49.97M	$18.41M
YoY Change	117.61%	171.44%	-40.98%
TOTAL ASSETS
Total Short-Term Assets	$280.9M	$276.1M	$187.9M
Total Long-Term Assets	$62.45M	$49.97M	$18.41M
Total Assets	$343.3M	$326.1M	$206.3M
YoY Change	59.91%	58.08%	116.36%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$21.78M	$17.75M	$6.824M
YoY Change	94.49%	160.04%	32.5%
Accrued Expenses	$5.896M	$8.014M	$3.930M
YoY Change	-75.54%	103.92%	38.77%
Deferred Revenue	$4.377M	$3.869M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$99.65M	$99.40M	$66.29M
YoY Change	29.92%	49.95%	83.7%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change			-100.0%
Other Long-Term Liabilities	$16.96M	$17.67M	$8.731M
YoY Change	-0.84%	102.41%	21.58%
Total Long-Term Liabilities	$16.96M	$17.67M	$8.731M
YoY Change	-0.84%	102.41%	-90.29%
TOTAL LIABILITIES
Total Short-Term Liabilities	$99.65M	$99.40M	$66.29M
Total Long-Term Liabilities	$16.96M	$17.67M	$8.731M
Total Liabilities	$136.2M	$131.1M	$75.02M
YoY Change	45.31%	74.8%	-39.74%
SHAREHOLDERS EQUITY
Retained Earnings	-$639.7M	-$624.8M	-$600.1M
YoY Change		4.12%	25.64%
Common Stock	$847.1M	$819.7M	$731.4M
YoY Change		12.08%	63.08%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$207.2M	$195.0M	$131.3M
YoY Change
Total Liabilities & Shareholders Equity	$343.3M	$326.1M	$206.3M
YoY Change	59.91%	58.08%	116.36%

Cashflow Statement

Concept	2020 Q1	2019 Q4	2018 Q4
OPERATING ACTIVITIES
Net Income	-$14.87M	$2.652M	$3.686M
YoY Change	-35.34%	-28.05%	-132.32%
Depreciation, Depletion And Amortization	$1.830M	$1.640M	$1.470M
YoY Change	27.26%	11.56%	-30.99%
Cash From Operating Activities	-$20.63M	$19.45M	$14.13M
YoY Change	400.27%	37.65%	-221.39%
INVESTING ACTIVITIES
Capital Expenditures	$6.766M	-$6.750M	-$890.0K
YoY Change	380.54%	658.43%	-37.32%
Acquisitions
YoY Change
Other Investing Activities	$39.68M	-$14.15M	-$5.700M
YoY Change	1711.87%	148.25%
Cash From Investing Activities	$32.92M	-$20.91M	-$6.590M
YoY Change	4130.85%	217.3%	364.08%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$11.47M
YoY Change	504.53%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$11.48M	6.420M	1.950M
YoY Change	485.17%	229.23%	-70.81%
NET CHANGE
Cash From Operating Activities	-$20.63M	19.45M	14.13M
Cash From Investing Activities	$32.92M	-20.91M	-6.590M
Cash From Financing Activities	$11.48M	6.420M	1.950M
Net Change In Cash	$23.31M	4.960M	9.490M
YoY Change	-1787.91%	-47.73%	-248.75%
FREE CASH FLOW
Cash From Operating Activities	-$20.63M	$19.45M	$14.13M
Capital Expenditures	$6.766M	-$6.750M	-$890.0K
Free Cash Flow	-$27.40M	$26.20M	$15.02M
YoY Change	395.25%	74.43%	-246.97%

Facts In Submission

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CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0001438133
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CY2019	dei	Entity File Number EntityFileNumber	001-36189
CY2019	dei	Entity Registrant Name EntityRegistrantName	Tandem Diabetes Care, Inc.
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	20-4327508
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	11075 Roselle Street
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	92121
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CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
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CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	24003000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-13000	USD
CY2018	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	149000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-122611000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	131275000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	17675000	USD
CY2019	tndm	Stock Issued During Period Value Common Stock Warrants Exercised StockIssuedDuringPeriodValueCommonStockWarrantsExercised	327000	USD
CY2019	tndm	Fair Value Of Common Stock Warrants At Time Of Exercise FairValueOfCommonStockWarrantsAtTimeOfExercise	5492000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	6206000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	58622000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	77000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	58000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-24753000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	194979000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-24753000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	-122611000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	-73033000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	6072000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	5821000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	6866000	USD
CY2019	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	0	USD
CY2018	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1721000	USD
CY2017	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1883000	USD
CY2019	us-gaap	Paid In Kind Interest PaidInKindInterest	0	USD
CY2018	us-gaap	Paid In Kind Interest PaidInKindInterest	0	USD
CY2017	us-gaap	Paid In Kind Interest PaidInKindInterest	1657000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2322000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1448000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	824000	USD
CY2019	us-gaap	Inventory Write Down InventoryWriteDown	2353000	USD
CY2018	us-gaap	Inventory Write Down InventoryWriteDown	607000	USD
CY2017	us-gaap	Inventory Write Down InventoryWriteDown	26000	USD
CY2019	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	11075000	USD
CY2018	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	66494000	USD
CY2017	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-1021000	USD
CY2019	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	565000	USD
CY2018	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-539000	USD
CY2017	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	16000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	58071000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	23736000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	12628000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5313000	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-321000	USD
CY2018	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	152000	USD
CY2017	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	159000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	13698000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	15848000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	10445000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	30975000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-6756000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	5894000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	584000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1576000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1831000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	580000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	26000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-4000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	8910000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	1641000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-1953000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	4076000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	1097000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	1203000	USD
CY2019	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	4285000	USD
CY2018	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	9542000	USD
CY2017	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	3873000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	4589000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	2074000	USD
CY2017	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-3906000	USD
CY2019	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	4216000	USD
CY2018	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	2434000	USD
CY2017	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-432000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	7412000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	2367000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-390000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	41905000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-8319000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-66136000	USD
CY2019	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	164572000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	9348000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	USD
CY2018	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	123553000	USD
CY2017	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	0	USD
CY2019	us-gaap	Proceeds From Sale Maturity And Collection Of Shortterm Investments ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments	114908000	USD
CY2018	us-gaap	Proceeds From Sale Maturity And Collection Of Shortterm Investments ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments	35800000	USD
CY2017	us-gaap	Proceeds From Sale Maturity And Collection Of Shortterm Investments ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments	8500000	USD
CY2019	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	12250000	USD
CY2018	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	0	USD
CY2017	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	0	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	19541000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2986000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5718000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-56955000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-90739000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	2782000	USD
CY2019	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	0	USD
CY2018	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	87711000	USD
CY2017	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	0	USD
CY2019	tndm	Proceeds From Public Offering Net Of Offering Costs ProceedsFromPublicOfferingNetOfOfferingCosts	0	USD
CY2018	tndm	Proceeds From Public Offering Net Of Offering Costs ProceedsFromPublicOfferingNetOfOfferingCosts	172929000	USD
CY2017	tndm	Proceeds From Public Offering Net Of Offering Costs ProceedsFromPublicOfferingNetOfOfferingCosts	39806000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	23880000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2391000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	570000	USD
CY2019	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	327000	USD
CY2018	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	29575000	USD
CY2017	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	24207000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	117184000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	40376000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	191000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	18126000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-22978000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	41826000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	23700000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	46678000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	51174000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	41826000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	10805000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	7876000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	23700000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	67000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	16000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	22000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	11635000	USD
CY2018	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2017	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2019	us-gaap	Payments For Leasing Costs Commissions And Tenant Improvements PaymentsForLeasingCostsCommissionsAndTenantImprovements	0	USD
CY2018	us-gaap	Payments For Leasing Costs Commissions And Tenant Improvements PaymentsForLeasingCostsCommissionsAndTenantImprovements	13000	USD
CY2017	us-gaap	Payments For Leasing Costs Commissions And Tenant Improvements PaymentsForLeasingCostsCommissionsAndTenantImprovements	3292000	USD
CY2019	tndm	Property And Equipment Included In Accounts Payable And Other Current Liabilities PropertyAndEquipmentIncludedInAccountsPayableAndOtherCurrentLiabilities	2134000	USD
CY2018	tndm	Property And Equipment Included In Accounts Payable And Other Current Liabilities PropertyAndEquipmentIncludedInAccountsPayableAndOtherCurrentLiabilities	125000	USD
CY2017	tndm	Property And Equipment Included In Accounts Payable And Other Current Liabilities PropertyAndEquipmentIncludedInAccountsPayableAndOtherCurrentLiabilities	92000	USD
CY2019	tndm	Debt Discount Incurred During Noncash Or Partial Noncash Transaction DebtDiscountIncurredDuringNoncashOrPartialNoncashTransaction	0	USD
CY2018	tndm	Debt Discount Incurred During Noncash Or Partial Noncash Transaction DebtDiscountIncurredDuringNoncashOrPartialNoncashTransaction	0	USD
CY2017	tndm	Debt Discount Incurred During Noncash Or Partial Noncash Transaction DebtDiscountIncurredDuringNoncashOrPartialNoncashTransaction	4137000	USD
CY2019	tndm	Common Stock Warrants Issued In Connection With Term Loan CommonStockWarrantsIssuedInConnectionWithTermLoan	0	USD
CY2018	tndm	Common Stock Warrants Issued In Connection With Term Loan CommonStockWarrantsIssuedInConnectionWithTermLoan	0	USD
CY2017	tndm	Common Stock Warrants Issued In Connection With Term Loan CommonStockWarrantsIssuedInConnectionWithTermLoan	3331000	USD
CY2019	tndm	Unsettled Purchase Of Investments Classified As Cash Equivalents In Other Current Liabilities UnsettledPurchaseOfInvestmentsClassifiedAsCashEquivalentsInOtherCurrentLiabilities	0	USD
CY2018	tndm	Unsettled Purchase Of Investments Classified As Cash Equivalents In Other Current Liabilities UnsettledPurchaseOfInvestmentsClassifiedAsCashEquivalentsInOtherCurrentLiabilities	1708000	USD
CY2017	tndm	Unsettled Purchase Of Investments Classified As Cash Equivalents In Other Current Liabilities UnsettledPurchaseOfInvestmentsClassifiedAsCashEquivalentsInOtherCurrentLiabilities	0	USD
CY2019Q4	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	176500000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-624800000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-24800000	USD
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="line-height:120%;padding-top:13px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Reclassifications</span></div><div style="line-height:120%;padding-top:13px;text-indent:60px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Certain reclassifications of prior year amounts related to the presentation of patents and long-term deferred rent on the consolidated balance sheet, and deferred rent on the consolidated statements of cash flows, have been made to conform to the current year presentation.</span></div>
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1448000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1035000	USD
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;padding-top:13px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</span></div><div style="line-height:120%;padding-top:13px;text-indent:60px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities in the Company’s consolidated financial statements and accompanying notes as of the date of the consolidated financial statements. Some of those judgments can be subjective and complex, and therefore, actual results could differ materially from those estimates under different assumptions or conditions.</span></div>
CY2019	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1
CY2019	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="line-height:120%;padding-top:13px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Concentration of Credit Risk</span></div><div style="line-height:120%;padding-top:16px;text-indent:60px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash, cash equivalents, short-term investments and accounts receivable. The Company maintains deposit accounts in federally insured financial institutions in excess of federally insured limits. The Company also maintains investments in money market funds that are not federally insured. Additionally, the Company has established guidelines regarding investment instruments and their maturities, which are designed to maintain preservation of principal and liquidity.</span></div>
CY2019Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	5700000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1837000	USD
CY2019Q4	tndm	Allowance For Sales Returns AllowanceForSalesReturns	400000	USD
CY2018Q4	tndm	Allowance For Sales Returns AllowanceForSalesReturns	300000	USD
CY2018Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	9138000	USD
CY2017Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	5640000	USD
CY2019	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	18335000	USD
CY2018	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	9617000	USD
CY2019	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	10167000	USD
CY2018	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	7797000	USD
CY2019	us-gaap	Product Warranty Accrual Preexisting Increase Decrease ProductWarrantyAccrualPreexistingIncreaseDecrease	-582000	USD
CY2018	us-gaap	Product Warranty Accrual Preexisting Increase Decrease ProductWarrantyAccrualPreexistingIncreaseDecrease	1678000	USD
CY2019Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	16724000	USD
CY2018Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	9138000	USD
CY2019Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	4707000	USD
CY2018Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	4206000	USD
CY2019Q4	us-gaap	Product Warranty Accrual Noncurrent ProductWarrantyAccrualNoncurrent	12017000	USD
CY2018Q4	us-gaap	Product Warranty Accrual Noncurrent ProductWarrantyAccrualNoncurrent	4932000	USD
CY2019Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	16724000	USD
CY2018Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	9138000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2322000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	855000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	3304000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	900000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	900000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	1100000	USD
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	6235000	shares
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	735000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	824000	USD
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4186000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2019Q4	tndm	Short Term Investments Amortized Cost ShortTermInvestmentsAmortizedCost	125194000	USD
CY2019Q4	tndm	Short Term Investments Accumulated Gross Unrealized Gain Before Tax ShortTermInvestmentsAccumulatedGrossUnrealizedGainBeforeTax	95000	USD
CY2019Q4	tndm	Short Term Investments Accumulated Gross Unrealized Loss Before Tax ShortTermInvestmentsAccumulatedGrossUnrealizedLossBeforeTax	6000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	125283000	USD
CY2018Q4	tndm	Short Term Investments Amortized Cost ShortTermInvestmentsAmortizedCost	87214000	USD
CY2018Q4	tndm	Short Term Investments Accumulated Gross Unrealized Gain Before Tax ShortTermInvestmentsAccumulatedGrossUnrealizedGainBeforeTax	12000	USD
CY2018Q4	tndm	Short Term Investments Accumulated Gross Unrealized Loss Before Tax ShortTermInvestmentsAccumulatedGrossUnrealizedLossBeforeTax	25000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	87201000	USD
CY2019Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	49889000	USD
CY2018Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	37030000	USD
CY2019Q4	tndm	Allowance For Doubtful Accounts Receivable Current And Product Returns AllowanceForDoubtfulAccountsReceivableCurrentAndProductReturns	3304000	USD
CY2018Q4	tndm	Allowance For Doubtful Accounts Receivable Current And Product Returns AllowanceForDoubtfulAccountsReceivableCurrentAndProductReturns	1837000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	46585000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	35193000	USD
CY2018	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	646000	USD
CY2017	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	524000	USD
CY2019Q4	tndm	Fair Value Of Warrant Liability FairValueOfWarrantLiability	5200000	USD
CY2019Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	20699000	USD
CY2018Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	6622000	USD
CY2019Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	16532000	USD
CY2018Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	2710000	USD
CY2019Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	11842000	USD
CY2018Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	10564000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	49073000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	19896000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	62788000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	42779000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	29865000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	25628000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	32923000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	17151000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	5700000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	5500000	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	6500000	USD
CY2019	us-gaap	Finite Lived Intangible Assets Remaining Amortization Period1 FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1	P30M
CY2018	us-gaap	Finite Lived Intangible Assets Remaining Amortization Period1 FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1	P42M
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	300000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	300000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	200000	USD
CY2019Q4	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	0	USD
CY2018Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	17926000	USD
CY2017Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	5432000	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Period Increase Decrease FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPeriodIncreaseDecrease	11075000	USD
CY2018	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Period Increase Decrease FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPeriodIncreaseDecrease	66494000	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues	5492000	USD
CY2018	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues	54000000	USD
CY2019Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	23509000	USD
CY2018Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	17926000	USD
CY2019	us-gaap	Lease Cost LeaseCost	5700000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	5500000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	200000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2600000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	3500000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	4300000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	6320000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	7100000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	5880000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2232000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	695000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	883000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	23110000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2727000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	20383000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	6320000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	14063000	USD
CY2017Q1	tndm	Proceeds From Issuance Of Secondary Public Offering Gross ProceedsFromIssuanceOfSecondaryPublicOfferingGross	23100000	USD
CY2018Q1	tndm	Proceeds From Issuance Of Secondary Public Offering Gross ProceedsFromIssuanceOfSecondaryPublicOfferingGross	69000000.0	USD
CY2018Q3	tndm	Proceeds From Issuance Of Secondary Public Offering Gross ProceedsFromIssuanceOfSecondaryPublicOfferingGross	115000000.0	USD
CY2019Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	12720000	shares
CY2019Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	98965	shares
CY2019Q4	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	73.73
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7174927	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1331269	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	47.11
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P8Y29D
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	0	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	4730956	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	20.34
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	136042	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	7.55
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	3953000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	162991	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	45.46
CY2018	tndm	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodAggregateIntrinsicValue	1466000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	5763192	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	23.61
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P8Y11M8D
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	116988000	USD
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	54.62
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1418953	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	12.46
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	71808000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	195823	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	42.93
CY2019	tndm	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodAggregateIntrinsicValue	4190000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7174927	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	38.40
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P8Y5M12D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	181408000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	7074615	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	38.30
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P8Y5M8D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	179865000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	3162475	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	29.58
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P7Y9M
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	119653000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	58071000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	23736000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12628000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1300000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	800000	USD
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	104000000.0	USD
CY2019	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	86000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	51000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	8000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	88000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	0	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	174000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	51000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	8000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-21000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-4000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-25000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	149000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	51000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-5167000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-25738000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-24829000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-1174000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-1649000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-2034000	USD
CY2019	tndm	Income Tax Reconciliation Warrants Revaluation IncomeTaxReconciliationWarrantsRevaluation	2326000	USD
CY2018	tndm	Income Tax Reconciliation Warrants Revaluation IncomeTaxReconciliationWarrantsRevaluation	13964000	USD
CY2017	tndm	Income Tax Reconciliation Warrants Revaluation IncomeTaxReconciliationWarrantsRevaluation	-347000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	2091000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	1425000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	480000	USD
CY2019	tndm	Effective Income Tax Rate Reconciliation Net Operating Loss Carryforward EffectiveIncomeTaxRateReconciliationNetOperatingLossCarryforward	25043000	USD
CY2018	tndm	Effective Income Tax Rate Reconciliation Net Operating Loss Carryforward EffectiveIncomeTaxRateReconciliationNetOperatingLossCarryforward	0	USD
CY2017	tndm	Effective Income Tax Rate Reconciliation Net Operating Loss Carryforward EffectiveIncomeTaxRateReconciliationNetOperatingLossCarryforward	0	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-8974000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	1362000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	3214000	USD
CY2019	tndm	Effective Income Tax Rate Reconciliation Officers Compensation EffectiveIncomeTaxRateReconciliationOfficersCompensation	3133000	USD
CY2018	tndm	Effective Income Tax Rate Reconciliation Officers Compensation EffectiveIncomeTaxRateReconciliationOfficersCompensation	0	USD
CY2017	tndm	Effective Income Tax Rate Reconciliation Officers Compensation EffectiveIncomeTaxRateReconciliationOfficersCompensation	0	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	51577000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	972000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	681000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	138000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-13919000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	12856000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-27231000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	149000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	51000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	109600000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	123500000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	66642000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	85761000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	5931000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	4942000	USD
CY2019Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	8745000	USD
CY2018Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	10759000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	19794000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	13816000	USD
CY2019Q4	tndm	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	5733000	USD
CY2018Q4	tndm	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	196000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	9350000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	8042000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	116195000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	123516000	USD
CY2019Q4	tndm	Deferred Tax Liabilities Lease Assets DeferredTaxLiabilitiesLeaseAssets	4570000	USD
CY2018Q4	tndm	Deferred Tax Liabilities Lease Assets DeferredTaxLiabilitiesLeaseAssets	0	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2026000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	0	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	6596000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	109599000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8824000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8121000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	123516000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	248700000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	250800000	USD
CY2019Q4	tndm	Deferred Tax Assets Operating Loss Carryforwards Domestic No Expiration DeferredTaxAssetsOperatingLossCarryforwardsDomesticNoExpiration	40200000	USD
CY2019Q4	tndm	Deferred Tax Assets Operating Loss Carryforwards Domestic Expires2026 DeferredTaxAssetsOperatingLossCarryforwardsDomesticExpires2026	208500000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8167000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1076000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	644000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	411000	USD
CY2019	tndm	Unrecognized Tax Benefits Increases Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions	-3320000	USD
CY2018	tndm	Unrecognized Tax Benefits Increases Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions	59000	USD
CY2017	tndm	Unrecognized Tax Benefits Increases Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions	-457000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	6580000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8824000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8121000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	5500000	USD
CY2019Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	24900000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	300000	USD
CY2019	tndm	Tax Cutsand Jobs Actof2017 Changein Tax Rate Deferred Tax Asset Income Tax Expense TaxCutsandJobsActof2017ChangeinTaxRateDeferredTaxAssetIncomeTaxExpense	51600000	USD
CY2019	tndm	Tax Cuts And Jobs Act Of2017 Maximum Deductions On Compensation For Certain Employees TaxCutsAndJobsActOf2017MaximumDeductionsOnCompensationForCertainEmployees	1000000.0	USD
CY2019Q4	us-gaap	Operating Expenses OperatingExpenses	58128000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-10997000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-1865000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-6004000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	2144000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	-22992000	USD
CY2019	tndm	Defined Contribution Plan Minimum Age Of Employee DefinedContributionPlanMinimumAgeOfEmployee	P18Y
CY2019Q4	tndm	Lessee Operating Lease Lease Not Yet Commenced Expense Due In First12 Months LesseeOperatingLeaseLeaseNotYetCommencedExpenseDueInFirst12Months	7010000	USD
CY2019Q4	tndm	Lessee Operating Lease Lease Not Yet Commenced Expense Due In Year Two LesseeOperatingLeaseLeaseNotYetCommencedExpenseDueInYearTwo	8201000	USD
CY2019Q4	tndm	Lessee Operating Lease Lease Not Yet Commenced Expense Due In Year Three LesseeOperatingLeaseLeaseNotYetCommencedExpenseDueInYearThree	7008000	USD
CY2019Q4	tndm	Lessee Operating Lease Lease Not Yet Commenced Expense Due In Year Four LesseeOperatingLeaseLeaseNotYetCommencedExpenseDueInYearFour	3388000	USD
CY2019Q4	tndm	Lessee Operating Lease Lease Not Yet Commenced Expense Due In Year Five LesseeOperatingLeaseLeaseNotYetCommencedExpenseDueInYearFive	1881000	USD
CY2019Q4	tndm	Lessee Operating Lease Lease Not Yet Commenced Expense Due After Year Five LesseeOperatingLeaseLeaseNotYetCommencedExpenseDueAfterYearFive	3975000	USD
CY2019Q4	tndm	Lessee Operating Lease Lease Not Yet Commenced Payments Due LesseeOperatingLeaseLeaseNotYetCommencedPaymentsDue	31463000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	23100000	USD
CY2019Q4	tndm	Lessee Operating Lease Commitment LesseeOperatingLeaseCommitment	8300000	USD
CY2019Q4	us-gaap	Purchase Obligation PurchaseObligation	128200000	USD
CY2019Q4	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	112200000	USD
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	65995000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	93255000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	94657000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	108398000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	33353000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	49904000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	50683000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	60272000	USD
CY2019Q1	us-gaap	Operating Expenses OperatingExpenses	44350000	USD
CY2019Q2	us-gaap	Operating Expenses OperatingExpenses	51769000	USD
CY2019Q3	us-gaap	Operating Expenses OperatingExpenses	56687000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	-1512000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-2901000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	2652000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.40
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.03
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.05
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.04
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.40
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.03
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04
CY2018Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	27277000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	34126000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	46264000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	76199000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	11404000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	15087000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	21796000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	41535000	USD
CY2018Q1	us-gaap	Operating Expenses OperatingExpenses	26889000	USD
CY2018Q2	us-gaap	Operating Expenses OperatingExpenses	29084000	USD
CY2018Q3	us-gaap	Operating Expenses OperatingExpenses	37505000	USD
CY2018Q4	us-gaap	Operating Expenses OperatingExpenses	40975000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-15485000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-13997000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-15709000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	560000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-32693000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-59359000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-34245000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	3686000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.82
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.17
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.62
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.06
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.82
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.17
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.62
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.02

Files In Submission

Name	View Source	Status
0001438133-20-000014-index-headers.html	Edgar Link	pending
0001438133-20-000014-index.html	Edgar Link	pending
0001438133-20-000014.txt	Edgar Link	pending
0001438133-20-000014-xbrl.zip	Edgar Link	pending
a10kimagetsportpumpandsmartp.jpg	Edgar Link	pending
exb1.jpg	Edgar Link	pending
exc1.jpg	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
gqfp4wytqwwm000002a02.jpg	Edgar Link	pending
gqfp4wytqwwm000003a02.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
tndm-20191231.xsd	Edgar Link	pending
tndm-20191231x10k.htm	Edgar Link	pending
tndm-20191231x10k_htm.xml	Edgar Link	completed
tndm-20191231xex1036.htm	Edgar Link	pending
tndm-20191231xex231con.htm	Edgar Link	pending
tndm-20191231xex311.htm	Edgar Link	pending
tndm-20191231xex312.htm	Edgar Link	pending
tndm-20191231xex321.htm	Edgar Link	pending
tndm-20191231xex322.htm	Edgar Link	pending
tndm-20191231xex47.htm	Edgar Link	pending
tndm-20191231_cal.xml	Edgar Link	unprocessable
tndm-20191231_def.xml	Edgar Link	unprocessable
tndm-20191231_lab.xml	Edgar Link	unprocessable
tndm-20191231_pre.xml	Edgar Link	unprocessable

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$TNDM
TANDEM DIABETES CARE INC Stock $tndm

2020 Q1 Form 10-K Financial Statement

#000143813320000014 Filed on February 24, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TNDM TANDEM DIABETES CARE INC Stock $tndm

2020 Q1 Form 10-K Financial Statement

#000143813320000014 Filed on February 24, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TNDM
TANDEM DIABETES CARE INC Stock $tndm