$RDFN
Redfin Corp Stock $rdfn

$rdfn Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000138282121000045 Filed on February 24, 2021

Income Statement

Concept	2019 Q4	2018 Q4	2018
Revenue	$233.2M	$124.1M	$486.9M
YoY Change	87.91%	29.54%	31.59%
Cost Of Revenue	$193.6M	$97.90M	$367.5M
YoY Change	97.75%	47.0%	42.32%
Gross Profit	$39.60M	$26.20M	$119.4M
YoY Change	51.15%	-10.27%	6.8%
Gross Profit Margin	16.98%	21.11%	24.53%
Selling, General & Admin	$46.40M	$38.70M	$109.6M
YoY Change	19.9%	22.86%	28.5%
% of Gross Profit	117.17%	147.71%	91.74%
Research & Development			$53.80M
YoY Change			26.49%
% of Gross Profit			45.05%
Depreciation & Amortization	$2.860M	$2.350M	$8.465M
YoY Change	21.7%	27.03%	17.96%
% of Gross Profit	7.22%	8.97%	7.09%
Operating Expenses	$46.40M	$38.70M	$163.4M
YoY Change	19.9%	22.86%	27.83%
Operating Profit	-$6.800M	-$12.50M	-$43.93M
YoY Change	-45.6%	443.48%	175.07%
Interest Expense	-$1.000M	$300.0K	$3.681M
YoY Change	-433.33%	-40.0%
% of Operating Profit
Other Income/Expense, Net	$100.0K	$0.00	$221.0K
YoY Change		-100.0%	-77.22%
Pretax Income	-$7.800M	-$12.20M	-$42.00M
YoY Change	-36.07%	577.78%	180.0%
Income Tax
% Of Pretax Income
Net Earnings	-$7.800M	-$12.20M	-$41.98M
YoY Change	-36.07%	577.78%	179.82%
Net Earnings / Revenue	-3.34%	-9.83%	-8.62%
Basic Earnings Per Share
Diluted Earnings Per Share	-$84.32K	-$136.0K	-$490.1K
COMMON SHARES
Basic Shares Outstanding	92.26M shares	89.53M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2019 Q4	2018 Q4	2018
SHORT-TERM ASSETS
Cash & Short-Term Investments	$304.7M	$432.6M	$432.6M
YoY Change	-29.56%	107.68%	107.68%
Cash & Equivalents	$234.7M	$432.6M	$432.6M
Short-Term Investments	$70.03M
Other Short-Term Assets	$3.496M	$2.307M	$20.70M
YoY Change	51.54%	603.35%	24.7%
Inventory	$74.59M	$22.69M	$22.70M
Prepaid Expenses	$14.82M	$11.92M
Receivables	$19.22M	$15.36M	$15.40M
Other Receivables	$22.00M	$4.900M	$4.900M
Total Short-Term Assets	$451.6M	$496.2M	$496.2M
YoY Change	-9.0%	106.59%	106.58%
LONG-TERM ASSETS
Property, Plant & Equipment	$39.58M	$25.19M	$25.20M
YoY Change	57.13%	12.86%	13.0%
Goodwill	$9.186M	$9.186M
YoY Change	0.0%	0.0%
Intangibles	$11.50M	$11.99M
YoY Change	-4.07%	264.06%
Long-Term Investments	$31.00M
YoY Change
Other Assets	$10.56M	$9.395M	$9.400M
YoY Change	12.37%	35.16%	34.29%
Total Long-Term Assets	$144.6M	$46.57M	$46.60M
YoY Change	210.52%	11.56%	11.48%
TOTAL ASSETS
Total Short-Term Assets	$451.6M	$496.2M	$496.2M
Total Long-Term Assets	$144.6M	$46.57M	$46.60M
Total Assets	$596.2M	$542.8M	$542.8M
YoY Change	9.84%	92.52%	92.48%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.122M	$2.516M	$2.500M
YoY Change	-15.66%	32.35%	31.58%
Accrued Expenses	$38.02M	$30.84M	$30.80M
YoY Change	23.3%	15.91%	15.79%
Deferred Revenue	$7.109M	$6.226M
YoY Change	14.18%
Short-Term Debt	$25.70M	$4.700M	$4.700M
YoY Change	446.81%	135.0%	135.0%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$85.18M	$46.22M	$46.20M
YoY Change	84.3%	28.9%	28.69%
LONG-TERM LIABILITIES
Long-Term Debt	$119.7M	$113.6M	$113.6M
YoY Change	5.37%
Other Long-Term Liabilities	$59.90M	$11.10M	$11.10M
YoY Change	439.64%	3.74%	3.74%
Total Long-Term Liabilities	$179.6M	$124.7M	$124.7M
YoY Change	44.03%	1065.42%	1065.42%
TOTAL LIABILITIES
Total Short-Term Liabilities	$85.18M	$46.22M	$46.20M
Total Long-Term Liabilities	$179.6M	$124.7M	$124.7M
Total Liabilities	$264.8M	$170.9M	$170.9M
YoY Change	54.94%	267.29%	267.53%
SHAREHOLDERS EQUITY
Retained Earnings	-$251.8M	-$171.0M
YoY Change	47.26%	32.54%
Common Stock	$93.00K	$90.00K
YoY Change	3.33%	11.11%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$331.4M	$371.9M	$371.9M
YoY Change
Total Liabilities & Shareholders Equity	$596.2M	$542.8M	$542.8M
YoY Change	9.84%	92.52%	92.48%

Cashflow Statement

Concept	2019 Q4	2018 Q4	2018
OPERATING ACTIVITIES
Net Income	-$7.800M	-$12.20M	-$41.98M
YoY Change	-36.07%	577.78%	179.82%
Depreciation, Depletion And Amortization	$2.860M	$2.350M	$8.465M
YoY Change	21.7%	27.03%	17.96%
Cash From Operating Activities	$25.03M	-$15.89M	-$36.70M
YoY Change	-257.52%	193.72%	-785.38%
INVESTING ACTIVITIES
Capital Expenditures	-$2.710M	-$2.770M	$8.303M
YoY Change	-2.17%	72.05%	-31.45%
Acquisitions
YoY Change
Other Investing Activities	-$220.0K	-$2.000M	-$2.000M
YoY Change	-89.0%	-258.73%	-214.29%
Cash From Investing Activities	-$2.930M	-$4.770M	-$10.30M
YoY Change	-38.57%	1262.86%	-0.59%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$107.6M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	6.130M	-1.210M	$273.4M
YoY Change	-606.61%	-70.56%	82.48%
NET CHANGE
Cash From Operating Activities	25.03M	-15.89M	-$36.70M
Cash From Investing Activities	-2.930M	-4.770M	-$10.30M
Cash From Financing Activities	6.130M	-1.210M	$273.4M
Net Change In Cash	28.23M	-21.87M	$226.4M
YoY Change	-229.08%	121.58%	56.34%
FREE CASH FLOW
Cash From Operating Activities	$25.03M	-$15.89M	-$36.70M
Capital Expenditures	-$2.710M	-$2.770M	$8.303M
Free Cash Flow	$27.74M	-$13.12M	-$45.01M
YoY Change	-311.43%	245.26%	565.95%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	46550000	USD
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001382821
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	160000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	165000	USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	103000594	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	93001597	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	103000594	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	93001597	shares
CY2020Q4	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	0.001
CY2020Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2019Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2020Q4	us-gaap	Temporary Equity Shares Issued TemporaryEquitySharesIssued	40000	shares
CY2019Q4	us-gaap	Temporary Equity Shares Issued TemporaryEquitySharesIssued	0	shares
CY2020Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	40000	shares
CY2019Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	0	shares
CY2019Q4	us-gaap	Goodwill Goodwill	9186000	USD
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P0Y
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	488000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	488000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	488000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	488000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	488000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	366000	USD
CY2020Q4	rdfn	Finite Lived Intangible Assets Amortization Expense Next Five Years FiniteLivedIntangibleAssetsAmortizationExpenseNextFiveYears	1830000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	0	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-38160
CY2020	dei	Entity Registrant Name EntityRegistrantName	Redfin Corporation
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	74-3064240
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	1099 Stewart Street
CY2020	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 600
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Seattle
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98101
CY2020	dei	City Area Code CityAreaCode	(206)
CY2020	dei	Local Phone Number LocalPhoneNumber	576-8333
CY2020	dei	Security12b Title Security12bTitle	Common Stock, $0.001 par value per share
CY2020	dei	Trading Symbol TradingSymbol	RDFN
CY2020	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Entity Shell Company EntityShellCompany	false
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CY2019Q4	us-gaap	Restricted Cash RestrictedCash	12769000	USD
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CY2019Q4	us-gaap	Short Term Investments ShortTermInvestments	70029000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	54719000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	19223000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	49158000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	74590000	USD
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CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	43988000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	39577000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	44149000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	52004000	USD
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CY2019Q4	us-gaap	Long Term Investments LongTermInvestments	30978000	USD
CY2020Q4	us-gaap	Convertible Debt Current ConvertibleDebtCurrent	22482000	USD
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CY2020Q4	us-gaap	Warehouse Agreement Borrowings WarehouseAgreementBorrowings	39029000	USD
CY2019Q4	us-gaap	Warehouse Agreement Borrowings WarehouseAgreementBorrowings	21302000	USD
CY2020Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	23949000	USD
CY2019Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	4444000	USD
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CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	49339000	USD
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CY2019Q4	us-gaap	Common Stock Value CommonStockValue	93000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	860556000	USD
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CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	84297000	USD
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CY2020	us-gaap	Marketing Expense MarketingExpense	54881000	USD
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CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	2074000	USD
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CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	5416000	USD
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CY2020	us-gaap	Net Income Loss NetIncomeLoss	-18527000	USD
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CY2018	us-gaap	Net Income Loss NetIncomeLoss	-41978000	USD
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CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.88
CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	98574529	shares
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	91583533	shares
CY2018	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	85669039	shares
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-18527000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-41978000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-3000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	33000	USD
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	0	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	172000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	9000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	169000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	42000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	0	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-18358000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-80763000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-41978000	USD
CY2020	rdfn	Employee Retention Credit Cares Act EmployeeRetentionCreditCARESAct	1348000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-18527000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-41978000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	14564000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	9230000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	8465000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	36973000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	27814000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	20438000	USD
CY2020	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	12038000	USD
CY2019	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	6385000	USD
CY2018	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2584000	USD
CY2020	rdfn	Operating Lease Non Cash Lease Expense OperatingLeaseNonCashLeaseExpense	9204000	USD
CY2019	rdfn	Operating Lease Non Cash Lease Expense OperatingLeaseNonCashLeaseExpense	6940000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	2063000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4634000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020	rdfn	Gain Loss On Interest Rate Lock Commitments Forward Sales Commitments And Fair Value Adjustment Of Loans Held For Sale GainLossOnInterestRateLockCommitmentsForwardSalesCommitmentsAndFairValueAdjustmentOfLoansHeldForSale	-1921000	USD
CY2019	rdfn	Gain Loss On Interest Rate Lock Commitments Forward Sales Commitments And Fair Value Adjustment Of Loans Held For Sale GainLossOnInterestRateLockCommitmentsForwardSalesCommitmentsAndFairValueAdjustmentOfLoansHeldForSale	-493000	USD
CY2018	rdfn	Gain Loss On Interest Rate Lock Commitments Forward Sales Commitments And Fair Value Adjustment Of Loans Held For Sale GainLossOnInterestRateLockCommitmentsForwardSalesCommitmentsAndFairValueAdjustmentOfLoansHeldForSale	-219000	USD
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-349000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-663000	USD
CY2018	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	0	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	35496000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3861000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2029000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-25432000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	51896000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	19312000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-2333000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3293000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	5500000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2086000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-394000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	617000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	39092000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	7422000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	4435000	USD
CY2020	rdfn	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-11312000	USD
CY2019	rdfn	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-7209000	USD
CY2020	rdfn	Increase Decreasein Deferred Lease Liability IncreaseDecreaseinDeferredLeaseLiability	0	USD
CY2019	rdfn	Increase Decreasein Deferred Lease Liability IncreaseDecreaseinDeferredLeaseLiability	1000	USD
CY2018	rdfn	Increase Decreasein Deferred Lease Liability IncreaseDecreaseinDeferredLeaseLiability	-1249000	USD
CY2020	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	677310000	USD
CY2019	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	395354000	USD
CY2018	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	85955000	USD
CY2020	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	657763000	USD
CY2019	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	378566000	USD
CY2018	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	83001000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	61267000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-107610000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-36702000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	14686000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	15533000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8303000	USD
CY2020	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	198172000	USD
CY2019	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	136265000	USD
CY2018	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	2000000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	7887000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	11486000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	147852000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	24400000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	0	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-57119000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-115912000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-10303000	USD
CY2020	rdfn	Proceeds From Issuance Of Temporary Equity ProceedsFromIssuanceOfTemporaryEquity	39801000	USD
CY2019	rdfn	Proceeds From Issuance Of Temporary Equity ProceedsFromIssuanceOfTemporaryEquity	0	USD
CY2018	rdfn	Proceeds From Issuance Of Temporary Equity ProceedsFromIssuanceOfTemporaryEquity	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	69701000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	107593000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	21072000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	16107000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	23407000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	16852000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5126000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1426000	USD
CY2020	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	662278000	USD
CY2019	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	388586000	USD
CY2018	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	83842000	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	644551000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	372017000	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	81125000	USD
CY2020	us-gaap	Proceeds From Secured Lines Of Credit ProceedsFromSecuredLinesOfCredit	89619000	USD
CY2019	us-gaap	Proceeds From Secured Lines Of Credit ProceedsFromSecuredLinesOfCredit	4444000	USD
CY2018	us-gaap	Proceeds From Secured Lines Of Credit ProceedsFromSecuredLinesOfCredit	0	USD
CY2020	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	70115000	USD
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	0	USD
CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	0	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	4000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	922000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2020	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	647486000	USD
CY2019	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2018	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	138953000	USD
CY2020	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	108061000	USD
CY2019	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
CY2018	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	221000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	72000	USD
CY2018	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	0	USD
CY2020	rdfn	Proceeds From Customer Escrow Deposits ProceedsFromCustomerEscrowDeposits	4074000	USD
CY2019	rdfn	Proceeds From Customer Escrow Deposits ProceedsFromCustomerEscrowDeposits	883000	USD
CY2018	rdfn	Proceeds From Customer Escrow Deposits ProceedsFromCustomerEscrowDeposits	2158000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	694227000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	31883000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	273402000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-3000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	32000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	698372000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-191607000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	226397000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	247448000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	439055000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	212658000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	945820000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	247448000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	439055000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	4958000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	2460000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2020	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	-2348000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	-1280000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	-522000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1682000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	223000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	82000	USD
CY2020	rdfn	Leasehold Improvements Paid Directly By Lessor LeaseholdImprovementsPaidDirectlyByLessor	-37000	USD
CY2019	rdfn	Leasehold Improvements Paid Directly By Lessor LeaseholdImprovementsPaidDirectlyByLessor	-6230000	USD
CY2018	rdfn	Leasehold Improvements Paid Directly By Lessor LeaseholdImprovementsPaidDirectlyByLessor	-1980000	USD
CY2020	rdfn	Issuance Of Common Stock For Repurchase And Conversions Of Convertible Senior Notes IssuanceOfCommonStockForRepurchaseAndConversionsOfConvertibleSeniorNotes	98397000	USD
CY2019	rdfn	Issuance Of Common Stock For Repurchase And Conversions Of Convertible Senior Notes IssuanceOfCommonStockForRepurchaseAndConversionsOfConvertibleSeniorNotes	0	USD
CY2018	rdfn	Issuance Of Common Stock For Repurchase And Conversions Of Convertible Senior Notes IssuanceOfCommonStockForRepurchaseAndConversionsOfConvertibleSeniorNotes	0	USD
CY2017Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	0	shares
CY2017Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	0	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	235430000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	6588000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	16820000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1426000	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	107593000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	27951000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	20960000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-41978000	USD
CY2018Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	0	shares
CY2018Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	0	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	371938000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	6732000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	9570000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	5126000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	29095000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	42000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2019Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	0	shares
CY2019Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	0	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	331446000	USD
CY2020	rdfn	Temporary Equity Stock Issued During Period Shares New Issues TemporaryEquityStockIssuedDuringPeriodSharesNewIssues	40000	shares
CY2020	us-gaap	Temporary Equity Stock Issued During Period Value New Issues TemporaryEquityStockIssuedDuringPeriodValueNewIssues	39823000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	69701000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	165257000	USD
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	8174000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	12705000	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	16852000	USD
CY2020	rdfn	Stock Issued During Period Value Repurchase Of Convertible Securities StockIssuedDuringPeriodValueRepurchaseOfConvertibleSecurities	-699000	USD
CY2020	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities Net Of Adjustments StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments	-138000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	39321000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	169000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-18527000	USD
CY2020Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	40000	shares
CY2020Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	39823000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	590557000	USD
CY2020	rdfn	Employee Retention Credit Cares Act EmployeeRetentionCreditCARESAct	1348000	USD
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<span style="color:#231f20;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates</span><span style="color:#231f20;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">—</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of consolidated financial statements, in conformity with GAAP, requires our management to make estimates and assumptions that affect the reported amounts of assets and liabilities and results of operations during the respective periods. Our estimates include, but are not limited to, valuation of deferred income taxes, stock-based compensation, net realizable value of inventory, capitalization of website and software development costs, the incremental borrowing rate for the determination of the present value of lease payments, recoverability of intangible assets with finite lives, fair value of our mortgage loans held for sale, fair value of reporting units for purposes of evaluating goodwill for impairment, current expected credit losses on certain financial assets, and the fair value of the convertible feature related to our convertible senior notes (see Note 15). The amounts ultimately realized from the affected assets or ultimately recognized as liabilities will depend on, among other factors, general business conditions and could differ materially in the near term from the carrying amounts reflected in the consolidated financial statements.</span>
CY2020	rdfn	Material Classes Of Receivables MaterialClassesOfReceivables	2	numberOfClassesOfReceivables
CY2020	rdfn	Number Of Types Of Investments NumberOfTypesOfInvestments	2	investment_type
CY2020	us-gaap	Impairment Of Investments ImpairmentOfInvestments	-1919000	USD
CY2020	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<span style="color:#231f20;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Concentration of Credit Risk</span><span style="color:#231f20;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">—Financial instruments that potentially subject us to concentrations of credit risk are primarily cash and cash equivalents and investments. We generally place our cash and cash equivalents and investments with major financial institutions we deem to be of high-credit-quality in order to limit our credit exposure. We maintain our cash accounts with financial institutions where deposits exceed federal insurance limits.</span>
CY2020	rdfn	Numberof Inventory Categories NumberofInventoryCategories	3	inventory_category
CY2020	rdfn	Inventory Real Estate Rental Period InventoryRealEstateRentalPeriod	P30D
CY2020	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P10Y
CY2020Q4	us-gaap	Goodwill Goodwill	9186000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	9186000	USD
CY2020Q4	us-gaap	Lessee Finance Lease Term Of Contract1 LesseeFinanceLeaseTermOfContract1	P4Y
CY2020	us-gaap	Advertising Expense AdvertisingExpense	42919000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	62536000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	33457000	USD
CY2020	rdfn	Advertising Production Costs AdvertisingProductionCosts	256000	USD
CY2019	rdfn	Advertising Production Costs AdvertisingProductionCosts	2029000	USD
CY2018	rdfn	Advertising Production Costs AdvertisingProductionCosts	1644000	USD
CY2020Q4	us-gaap	Convertible Debt Current ConvertibleDebtCurrent	22482000	USD
CY2020Q4	us-gaap	Convertible Debt Noncurrent ConvertibleDebtNoncurrent	488268000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	860556000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-270313000	USD
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	5	numberOfClassesOfReceivables
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	numberOfClassesOfReceivables
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	886093000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	779796000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	486920000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	653983000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	635693000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	367496000	USD
CY2020	us-gaap	Gross Profit GrossProfit	232110000	USD
CY2019	us-gaap	Gross Profit GrossProfit	144103000	USD
CY2018	us-gaap	Gross Profit GrossProfit	119424000	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	231318000	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	231318000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	223349000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	223349000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	163358000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	163358000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	2074000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	7146000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	5416000	USD
CY2020	us-gaap	Interest Expense InterestExpense	19495000	USD
CY2019	us-gaap	Interest Expense InterestExpense	8928000	USD
CY2018	us-gaap	Interest Expense InterestExpense	3681000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1898000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	223000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	221000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-18527000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-41978000	USD
CY2019Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	438000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues	18090000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	16986000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	229000	USD
CY2020Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	1771000	USD
CY2020Q4	us-gaap	Share Price SharePrice	68.63
CY2020Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	2000000	USD
CY2020	us-gaap	Impairment Of Investments ImpairmentOfInvestments	-1919000	USD
CY2019Q4	rdfn	Cash Cash Equivalents And Available For Sale Debt Securities Amortized Cost CashCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCost	348446000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	31000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	22000	USD
CY2019Q4	rdfn	Cash Cash Equivalents And Available For Sale Debt Securities CashCashEquivalentsAndAvailableForSaleDebtSecurities	348455000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	70029000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities Noncurrent AvailableForSaleSecuritiesDebtSecuritiesNoncurrent	30978000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	0	USD
CY2019Q4	us-gaap	Inventory Real Estate Construction In Process InventoryRealEstateConstructionInProcess	34445000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	0	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	22000	USD
CY2020Q4	us-gaap	Interest Receivable InterestReceivable	108000	USD
CY2019Q4	us-gaap	Interest Receivable InterestReceivable	183000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	USD
CY2020Q4	us-gaap	Inventory Real Estate Held For Sale InventoryRealEstateHeldForSale	17153000	USD
CY2019Q4	us-gaap	Inventory Real Estate Held For Sale InventoryRealEstateHeldForSale	36982000	USD
CY2020Q4	rdfn	Inventory Real Estate Not Available For Sale InventoryRealEstateNotAvailableForSale	7225000	USD
CY2019Q4	rdfn	Inventory Real Estate Not Available For Sale InventoryRealEstateNotAvailableForSale	3163000	USD
CY2020Q4	us-gaap	Inventory Real Estate Construction In Process InventoryRealEstateConstructionInProcess	24780000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	49158000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	74590000	USD
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	29000	USD
CY2019Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	143000	USD
CY2020	rdfn	Inventory Net Additions InventoryNetAdditions	158269000	USD
CY2019	rdfn	Inventory Net Additions InventoryNetAdditions	264290000	USD
CY2020	rdfn	Inventory Net Sales InventoryNetSales	182906000	USD
CY2019	rdfn	Inventory Net Sales InventoryNetSales	214118000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	79909000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	68149000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	41614000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	29047000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	43988000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	39577000	USD
CY2020	us-gaap	Depreciation Depreciation	14076000	USD
CY2019	us-gaap	Depreciation Depreciation	8742000	USD
CY2018	us-gaap	Depreciation Depreciation	7977000	USD
CY2020Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	11414000	USD
CY2019Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	8396000	USD
CY2018Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	5796000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	12941000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	11618000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	130000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	20000	USD
CY2020	rdfn	Finance Lease Cost FinanceLeaseCost	150000	USD
CY2019	rdfn	Finance Lease Cost FinanceLeaseCost	23000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	998000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2180000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	14194000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	206000	USD
CY2020Q4	rdfn	Lessee Operating Lease Liability Other Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityOtherPaymentsDueNextTwelveMonths	1141000	USD
CY2020Q4	rdfn	Lessee Lease Liability Payments Due Next Twelve Months LesseeLeaseLiabilityPaymentsDueNextTwelveMonths	15541000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	13582000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	206000	USD
CY2020Q4	rdfn	Lessee Operating Lease Liability Other Payments Due Year Two LesseeOperatingLeaseLiabilityOtherPaymentsDueYearTwo	878000	USD
CY2020Q4	rdfn	Lessee Lease Liability Payments Due Year Two LesseeLeaseLiabilityPaymentsDueYearTwo	14666000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	12572000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	192000	USD
CY2020Q4	rdfn	Lessee Operating Lease Liability Other Payments Due Year Three LesseeOperatingLeaseLiabilityOtherPaymentsDueYearThree	871000	USD
CY2020Q4	rdfn	Lessee Lease Liability Payments Due Year Three LesseeLeaseLiabilityPaymentsDueYearThree	13635000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	10761000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	93000	USD
CY2020Q4	rdfn	Lessee Operating Lease Liability Other Payments Due Year Four LesseeOperatingLeaseLiabilityOtherPaymentsDueYearFour	1279000	USD
CY2020Q4	rdfn	Lessee Lease Liability Payments Due Year Four LesseeLeaseLiabilityPaymentsDueYearFour	12133000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	7364000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2020Q4	rdfn	Lessee Operating Lease Liability Other Payments Due Year Five LesseeOperatingLeaseLiabilityOtherPaymentsDueYearFive	559000	USD
CY2020Q4	rdfn	Lessee Lease Liability Payments Due Year Five LesseeLeaseLiabilityPaymentsDueYearFive	7923000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	9536000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2020Q4	rdfn	Lessee Operating Lease Liability Other Payments Due After Year Five LesseeOperatingLeaseLiabilityOtherPaymentsDueAfterYearFive	1421000	USD
CY2020Q4	rdfn	Lessee Lease Liability Payments Due After Year Five LesseeLeaseLiabilityPaymentsDueAfterYearFive	10957000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	68009000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	697000	USD
CY2020Q4	rdfn	Lessee Operating Lease Liability Other Payments Due LesseeOperatingLeaseLiabilityOtherPaymentsDue	6149000	USD
CY2020Q4	rdfn	Lessee Lease Liability Payments Due LesseeLeaseLiabilityPaymentsDue	74855000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	7333000	USD
CY2020Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	61000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	60676000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	636000	USD
CY2020	rdfn	Operating Lease Capitalized Interest Expense OperatingLeaseCapitalizedInterestExpense	2397000	USD
CY2020	rdfn	Financing Lease Capitalized Interest Expense FinancingLeaseCapitalizedInterestExpense	30000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y2M12D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y1M6D
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y6M
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y9M18D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.044
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.044
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.054
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.054
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	14207000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	9868000	USD
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	20000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	3000	USD
CY2020	rdfn	Finance Lease Cash Flows From Finance Lease Excluding Principal Payments And Interest FinanceLeaseCashFlowsFromFinanceLeaseExcludingPrincipalPaymentsAndInterest	102000	USD
CY2019	rdfn	Finance Lease Cash Flows From Finance Lease Excluding Principal Payments And Interest FinanceLeaseCashFlowsFromFinanceLeaseExcludingPrincipalPaymentsAndInterest	14000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1186000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	58669000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	669000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	274000	USD
CY2020Q4	us-gaap	Loss Contingency Number Of Plaintiffs LossContingencyNumberOfPlaintiffs	10	numberOfClassesOfReceivables
CY2020Q4	us-gaap	Other Commitment Due In Next Twelve Months OtherCommitmentDueInNextTwelveMonths	63586000	USD
CY2020Q4	us-gaap	Other Commitment Due In Second Year OtherCommitmentDueInSecondYear	7430000	USD
CY2020Q4	us-gaap	Other Commitment Due In Third Year OtherCommitmentDueInThirdYear	745000	USD
CY2020Q4	us-gaap	Other Commitment Due In Fourth Year OtherCommitmentDueInFourthYear	0	USD
CY2020Q4	rdfn	Other Commitment Duein Fifth Yearand Thereafter OtherCommitmentDueinFifthYearandThereafter	0	USD
CY2020Q4	us-gaap	Other Commitment OtherCommitment	71761000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	4880000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	3050000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1830000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	4880000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2562000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	2318000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	488000	USD
CY2020Q4	rdfn	Finite Lived Intangible Assets Amortization Expense Next Five Years FiniteLivedIntangibleAssetsAmortizationExpenseNextFiveYears	1830000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	488000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	366000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	49238000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	30462000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	9722000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	7021000	USD
CY2020Q4	rdfn	Accrued Payroll Taxes Current Cares Act AccruedPayrollTaxesCurrentCARESAct	6812000	USD
CY2019Q4	rdfn	Accrued Payroll Taxes Current Cares Act AccruedPayrollTaxesCurrentCARESAct	0	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	3688000	USD
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	539000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	69460000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	38022000	USD
CY2020Q4	us-gaap	Deposits Deposits	11183000	USD
CY2019Q4	us-gaap	Deposits Deposits	7109000	USD
CY2020Q4	rdfn	Miscellaneous Other Payables Current MiscellaneousOtherPayablesCurrent	2001000	USD
CY2019Q4	rdfn	Miscellaneous Other Payables Current MiscellaneousOtherPayablesCurrent	775000	USD
CY2020Q4	rdfn	Other Payables Current OtherPayablesCurrent	13184000	USD
CY2019Q4	rdfn	Other Payables Current OtherPayablesCurrent	7884000	USD
CY2020Q2	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	110000000	USD
CY2020Q2	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	110000000	USD
CY2020Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	39823000	USD
CY2020	rdfn	Temporary Equity Dividends Shares TemporaryEquityDividendsShares	30640	shares
CY2020Q2	us-gaap	Convertible Preferred Stock Shares Issued Upon Conversion ConvertiblePreferredStockSharesIssuedUponConversion	2622177	shares
CY2020	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.00055
CY2020	us-gaap	Preferred Stock Dividend Rate Per Dollar Amount PreferredStockDividendRatePerDollarAmount	17.95
CY2020Q4	rdfn	Temporary Equity Conversion Price Ratio Denominator TemporaryEquityConversionPriceRatioDenominator	19.51	USD
CY2020	rdfn	Temporary Equity Conversion Stock Price Trigger TemporaryEquityConversionStockPriceTrigger	27.32	shares
CY2020	rdfn	Temporary Equity Threshold Consecutive Trading Days TemporaryEquityThresholdConsecutiveTradingDays	30	numberOfClassesOfReceivables
CY2020	rdfn	Temporary Equity Threshold Consecutive Trading Days TemporaryEquityThresholdConsecutiveTradingDays	30	numberOfClassesOfReceivables
CY2020	rdfn	Temporary Equity Threshold Consecutive Trading Days TemporaryEquityThresholdConsecutiveTradingDays	30	numberOfClassesOfReceivables
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2020Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2019Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2020Q4	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	0.001
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	8.98
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	5733738	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	36206	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	9.13
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	10299	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7792181	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	7.00
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P5Y3M10D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	111122000	USD
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	2011938	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	6.31
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	7.23
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y4M20D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	352076000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	5520083	shares
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CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	816000	USD
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	2228000	USD
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CY2018	us-gaap	Temporary Equity Dividends Adjustment TemporaryEquityDividendsAdjustment	0	USD
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CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	27814000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	20438000	USD
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CY2018	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	-522000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-18527000	USD
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CY2018	us-gaap	Net Income Loss NetIncomeLoss	-41978000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-41978000	USD
CY2020	us-gaap	Temporary Equity Dividends Adjustment TemporaryEquityDividendsAdjustment	-4454000	USD
CY2019	us-gaap	Temporary Equity Dividends Adjustment TemporaryEquityDividendsAdjustment	0	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-22981000	USD
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CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-80805000	USD
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CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-41978000	USD
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CY2020	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.23
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CY2018	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.49
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	22175834	shares
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CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	57763000	USD
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CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	22213000	USD
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CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	0	USD
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CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2159000	USD

Files In Submission

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$RDFN
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2019 Q4 Form 10-K Financial Statement

#000138282121000045 Filed on February 24, 2021

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$RDFN Redfin Corp Stock $rdfn

2019 Q4 Form 10-K Financial Statement

#000138282121000045 Filed on February 24, 2021

Income Statement

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$RDFN
Redfin Corp Stock $rdfn