$RDFN
Redfin Corp Stock $rdfn

$rdfn Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000138282120000025 Filed on February 12, 2020

Income Statement

Concept	2019 Q4	2018 Q4	2017 Q4
Revenue	$233.2M	$124.1M	$95.80M
YoY Change	87.91%	29.54%	43.41%
Cost Of Revenue	$193.6M	$97.90M	$66.60M
YoY Change	97.75%	47.0%	46.37%
Gross Profit	$39.60M	$26.20M	$29.20M
YoY Change	51.15%	-10.27%	37.09%
Gross Profit Margin	16.98%	21.11%	30.48%
Selling, General & Admin	$46.40M	$38.70M	$31.50M
YoY Change	19.9%	22.86%	22.09%
% of Gross Profit	117.17%	147.71%	107.88%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$2.860M	$2.350M	$1.850M
YoY Change	21.7%	27.03%	5.11%
% of Gross Profit	7.22%	8.97%	6.34%
Operating Expenses	$46.40M	$38.70M	$31.50M
YoY Change	19.9%	22.86%	17.98%
Operating Profit	-$6.800M	-$12.50M	-$2.300M
YoY Change	-45.6%	443.48%	-57.41%
Interest Expense	-$1.000M	$300.0K	$500.0K
YoY Change	-433.33%	-40.0%
% of Operating Profit
Other Income/Expense, Net	$100.0K	$0.00	$100.0K
YoY Change		-100.0%
Pretax Income	-$7.800M	-$12.20M	-$1.800M
YoY Change	-36.07%	577.78%	-66.04%
Income Tax			$12.70M
% Of Pretax Income
Net Earnings	-$7.800M	-$12.20M	-$1.800M
YoY Change	-36.07%	577.78%	-66.04%
Net Earnings / Revenue	-3.34%	-9.83%	-1.88%
Basic Earnings Per Share
Diluted Earnings Per Share	-$84.32K	-$136.0K	-$21.98K
COMMON SHARES
Basic Shares Outstanding	92.26M shares	89.53M shares	81.43M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2019 Q4	2018 Q4	2017 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$304.7M	$432.6M	$208.3M
YoY Change	-29.56%	107.68%	216.57%
Cash & Equivalents	$234.7M	$432.6M	$208.3M
Short-Term Investments	$70.03M		$0.00
Other Short-Term Assets	$3.496M	$2.307M	$328.0K
YoY Change	51.54%	603.35%	-96.26%
Inventory	$74.59M	$22.69M	$3.382M
Prepaid Expenses	$14.82M	$11.92M	$8.613M
Receivables	$19.22M	$15.36M	$13.33M
Other Receivables	$22.00M	$4.900M	$1.900M
Total Short-Term Assets	$451.6M	$496.2M	$240.2M
YoY Change	-9.0%	106.59%	157.21%
LONG-TERM ASSETS
Property, Plant & Equipment	$39.58M	$25.19M	$22.32M
YoY Change	57.13%	12.86%	16.08%
Goodwill	$9.186M	$9.186M	$9.186M
YoY Change	0.0%	0.0%	0.0%
Intangibles	$11.50M	$11.99M	$3.294M
YoY Change	-4.07%	264.06%	-12.9%
Long-Term Investments	$31.00M
YoY Change
Other Assets	$10.56M	$9.395M	$6.951M
YoY Change	12.37%	35.16%	-3.12%
Total Long-Term Assets	$144.6M	$46.57M	$41.75M
YoY Change	210.52%	11.56%	4.14%
TOTAL ASSETS
Total Short-Term Assets	$451.6M	$496.2M	$240.2M
Total Long-Term Assets	$144.6M	$46.57M	$41.75M
Total Assets	$596.2M	$542.8M	$282.0M
YoY Change	9.84%	92.52%	111.24%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.122M	$2.516M	$1.901M
YoY Change	-15.66%	32.35%	-64.7%
Accrued Expenses	$38.02M	$30.84M	$26.61M
YoY Change	23.3%	15.91%	19.56%
Deferred Revenue	$7.109M	$6.226M
YoY Change	14.18%
Short-Term Debt	$25.70M	$4.700M	$2.000M
YoY Change	446.81%	135.0%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$85.18M	$46.22M	$35.86M
YoY Change	84.3%	28.9%	8.85%
LONG-TERM LIABILITIES
Long-Term Debt	$119.7M	$113.6M	$0.00
YoY Change	5.37%
Other Long-Term Liabilities	$59.90M	$11.10M	$10.70M
YoY Change	439.64%	3.74%	20.22%
Total Long-Term Liabilities	$179.6M	$124.7M	$10.70M
YoY Change	44.03%	1065.42%	20.22%
TOTAL LIABILITIES
Total Short-Term Liabilities	$85.18M	$46.22M	$35.86M
Total Long-Term Liabilities	$179.6M	$124.7M	$10.70M
Total Liabilities	$264.8M	$170.9M	$46.53M
YoY Change	54.94%	267.29%	11.32%
SHAREHOLDERS EQUITY
Retained Earnings	-$251.8M	-$171.0M	-$129.0M
YoY Change	47.26%	32.54%	-77.12%
Common Stock	$93.00K	$90.00K	$81.00K
YoY Change	3.33%	11.11%	440.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$331.4M	$371.9M	$235.4M
YoY Change
Total Liabilities & Shareholders Equity	$596.2M	$542.8M	$282.0M
YoY Change	9.84%	92.52%	111.24%

Cashflow Statement

Concept	2019 Q4	2018 Q4	2017 Q4
OPERATING ACTIVITIES
Net Income	-$7.800M	-$12.20M	-$1.800M
YoY Change	-36.07%	577.78%	-66.04%
Depreciation, Depletion And Amortization	$2.860M	$2.350M	$1.850M
YoY Change	21.7%	27.03%	5.11%
Cash From Operating Activities	$25.03M	-$15.89M	-$5.410M
YoY Change	-257.52%	193.72%	91.17%
INVESTING ACTIVITIES
Capital Expenditures	-$2.710M	-$2.770M	-$1.610M
YoY Change	-2.17%	72.05%	-80.95%
Acquisitions
YoY Change
Other Investing Activities	-$220.0K	-$2.000M	$1.260M
YoY Change	-89.0%	-258.73%
Cash From Investing Activities	-$2.930M	-$4.770M	-$350.0K
YoY Change	-38.57%	1262.86%	-95.86%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	6.130M	-1.210M	-4.110M
YoY Change	-606.61%	-70.56%	-713.43%
NET CHANGE
Cash From Operating Activities	25.03M	-15.89M	-5.410M
Cash From Investing Activities	-2.930M	-4.770M	-350.0K
Cash From Financing Activities	6.130M	-1.210M	-4.110M
Net Change In Cash	28.23M	-21.87M	-9.870M
YoY Change	-229.08%	121.58%	-6.97%
FREE CASH FLOW
Cash From Operating Activities	$25.03M	-$15.89M	-$5.410M
Capital Expenditures	-$2.710M	-$2.770M	-$1.610M
Free Cash Flow	$27.74M	-$13.12M	-$3.800M
YoY Change	-311.43%	245.26%	-167.62%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0001382821
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CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	488000	USD
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	90151341	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	93001597	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	90151341	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	93001597	shares
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	488000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	488000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	488000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	9186000	USD
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CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
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CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	0	USD
CY2019	dei	Document Type DocumentType	10-K
CY2019Q4	us-gaap	Inventory Net InventoryNet	74590000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	22694000	USD
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	001-38160
CY2019	dei	Entity Registrant Name EntityRegistrantName	Redfin Corporation
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	74-3064240
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	1099 Stewart Street
CY2019	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 600
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Seattle
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98101
CY2019	dei	City Area Code CityAreaCode	(206)
CY2019	dei	Local Phone Number LocalPhoneNumber	576-8333
CY2019	dei	Security12b Title Security12bTitle	Common Stock, $0.001 par value per share
CY2019	dei	Trading Symbol TradingSymbol	RDFN
CY2019	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	20438000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	11101000	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
CY2017	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	0	USD
CY2019	rdfn	Operating Lease Non Cash Lease Expense OperatingLeaseNonCashLeaseExpense	6940000	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
CY2017	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	0	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3861000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2029000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2709000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	51896000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	19312000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	3382000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3539000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	5725000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-4450000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-394000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	617000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-252000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	7459000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	4509000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	5115000	USD
CY2019	rdfn	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-7209000	USD
CY2019	rdfn	Increase Decreasein Deferred Lease Liability IncreaseDecreaseinDeferredLeaseLiability	1000	USD
CY2018	rdfn	Increase Decreasein Deferred Lease Liability IncreaseDecreaseinDeferredLeaseLiability	-1249000	USD
CY2017	rdfn	Increase Decreasein Deferred Lease Liability IncreaseDecreaseinDeferredLeaseLiability	749000	USD
CY2019	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	395638000	USD
CY2018	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	86023000	USD
CY2017	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	11008000	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
CY2017	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	9117000	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
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	5355000	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
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	12113000	USD
CY2019	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	136265000	USD
CY2018	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	2000000	USD
CY2017	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	992000	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
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	2741000	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
CY2017	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	0	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
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-10364000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	16107000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	23407000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	3003000	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
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	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
CY2017	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	10746000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	372017000	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	81125000	USD
CY2017	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	8730000	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
CY2017	us-gaap	Proceeds From Secured Lines Of Credit ProceedsFromSecuredLinesOfCredit	0	USD
CY2019	rdfn	Proceeds From Customer Escrow Deposits ProceedsFromCustomerEscrowDeposits	883000	USD
CY2018	rdfn	Proceeds From Customer Escrow Deposits ProceedsFromCustomerEscrowDeposits	2158000	USD
CY2017	rdfn	Proceeds From Customer Escrow Deposits ProceedsFromCustomerEscrowDeposits	273000	USD
CY2019	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2018	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	138953000	USD
CY2017	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2019	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	0	USD
CY2018	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	0	USD
CY2017	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	148088000	USD
CY2019	us-gaap	Payments For Repurchase Of Initial Public Offering PaymentsForRepurchaseOfInitialPublicOffering	0	USD
CY2018	us-gaap	Payments For Repurchase Of Initial Public Offering PaymentsForRepurchaseOfInitialPublicOffering	0	USD
CY2017	us-gaap	Payments For Repurchase Of Initial Public Offering PaymentsForRepurchaseOfInitialPublicOffering	3558000	USD
CY2019	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	0	USD
CY2018	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	107593000	USD
CY2017	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	0	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	922000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	72000	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
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	149822000	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
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	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
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	144813000	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
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	67845000	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
CY2019	us-gaap	Interest Paid Net InterestPaidNet	2460000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2019	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	0	USD
CY2018	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	0	USD
CY2017	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	831331000	USD
CY2019	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	0	USD
CY2018	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	0	USD
CY2017	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	175915000	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
CY2017	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	268000	USD
CY2019	rdfn	Leasehold Improvements Paid Directly By Lessor LeaseholdImprovementsPaidDirectlyByLessor	6230000	USD
CY2018	rdfn	Leasehold Improvements Paid Directly By Lessor LeaseholdImprovementsPaidDirectlyByLessor	1980000	USD
CY2017	rdfn	Leasehold Improvements Paid Directly By Lessor LeaseholdImprovementsPaidDirectlyByLessor	822000	USD
CY2016Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	55422002	shares
CY2016Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	655416000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	-563734000	USD
CY2017Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0	USD
CY2017	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	148088000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	3708000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	3001000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	11369000	USD
CY2017	us-gaap	Temporary Equity Accretion To Redemption Value TemporaryEquityAccretionToRedemptionValue	175915000	USD
CY2017	us-gaap	Increase In Carrying Amount Of Redeemable Preferred Stock IncreaseInCarryingAmountOfRedeemablePreferredStock	175915000	USD
CY2017	rdfn	Conversionof Redeemable Convertible Preferred Stockto Common Stock Shares ConversionofRedeemableConvertiblePreferredStocktoCommonStockShares	55422002	shares
CY2017	rdfn	Conversionof Redeemable Convertible Preferred Stockto Common Stock ConversionofRedeemableConvertiblePreferredStocktoCommonStock	831331000	USD
CY2017	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	831331000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-15002000	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
CY2017Q3	us-gaap	Convertible Preferred Stock Shares Issued Upon Conversion ConvertiblePreferredStockSharesIssuedUponConversion	55422002	shares
CY2017Q3	rdfn	Conversion Of Stock Conversion Ratio ConversionOfStockConversionRatio	1
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;color:#231f20;font-weight:bold;">Use of Estimates</span><span style="font-family:Arial;font-size:10pt;color:#231f20;">—</span><span style="font-family:Arial;font-size:10pt;">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, and the fair value of the convertible feature related to our convertible senior notes (see Note 14). 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></div><div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;"><br/></span></div>
CY2019	rdfn	Number Of Types Of Investments NumberOfTypesOfInvestments	2	investment_type
CY2019	rdfn	Paymentsto Acquire Equity Securities Fvni PaymentstoAcquireEquitySecuritiesFVNI	2000000	USD
CY2019	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;color:#231f20;font-weight:bold;">Concentration of Credit Risk</span><span style="font-family:Arial;font-size:10pt;color:#231f20;">—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, at times, deposits exceed federal insurance limits.</span></div><div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;"><br/></span></div>
CY2019	rdfn	Numberof Inventory Categories NumberofInventoryCategories	3	inventory_category
CY2019	rdfn	Inventory Real Estate Rental Period InventoryRealEstateRentalPeriod	P30D
CY2019	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P10Y
CY2019Q4	us-gaap	Goodwill Goodwill	9186000	USD
CY2019Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	0	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	62536000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	33457000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	21902000	USD
CY2019	rdfn	Advertising Production Costs AdvertisingProductionCosts	2029000	USD
CY2018	rdfn	Advertising Production Costs AdvertisingProductionCosts	1644000	USD
CY2017	rdfn	Advertising Production Costs AdvertisingProductionCosts	1609000	USD
CY2019	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	5	segment
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
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
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	370036000	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
CY2017	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	258216000	USD
CY2019	us-gaap	Gross Profit GrossProfit	144103000	USD
CY2018	us-gaap	Gross Profit GrossProfit	119424000	USD
CY2017	us-gaap	Gross Profit GrossProfit	111820000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	223349000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	163358000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	127792000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	7146000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	5416000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	882000	USD
CY2019	us-gaap	Interest Expense InterestExpense	8928000	USD
CY2018	us-gaap	Interest Expense InterestExpense	3681000	USD
CY2017	us-gaap	Interest Expense InterestExpense	0	USD
CY2019	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	223000	USD
CY2018	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	221000	USD
CY2017	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	88000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-41978000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-15002000	USD
CY2019Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	19388000	USD
CY2018Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	15529000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	165000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	166000	USD
CY2019Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	19223000	USD
CY2018Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	15363000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	166000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	160000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	150000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-15000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	43000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	81000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	14000	USD
CY2018	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	37000	USD
CY2017	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	71000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	165000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	166000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	160000	USD
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	12769000	USD
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	12769000	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
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	6446000	USD
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	6446000	USD
CY2018Q4	rdfn	Cash Cash Equivalents And Available For Sale Debt Securities Amortized Cost CashCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCost	439054000	USD
CY2018Q4	rdfn	Cash Cash Equivalents And Available For Sale Debt Securities CashCashEquivalentsAndAvailableForSaleDebtSecurities	439054000	USD
CY2019	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2019Q4	us-gaap	Inventory Real Estate Held For Sale InventoryRealEstateHeldForSale	36982000	USD
CY2018Q4	us-gaap	Inventory Real Estate Held For Sale InventoryRealEstateHeldForSale	12649000	USD
CY2019Q4	rdfn	Inventory Real Estate Not Available For Sale InventoryRealEstateNotAvailableForSale	3163000	USD
CY2018Q4	rdfn	Inventory Real Estate Not Available For Sale InventoryRealEstateNotAvailableForSale	2328000	USD
CY2019Q4	us-gaap	Inventory Real Estate Construction In Process InventoryRealEstateConstructionInProcess	34445000	USD
CY2018Q4	us-gaap	Inventory Real Estate Construction In Process InventoryRealEstateConstructionInProcess	7717000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	74590000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	22694000	USD
CY2019Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	143000	USD
CY2018Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	190000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	22694000	USD
CY2019	rdfn	Inventory Net Additions InventoryNetAdditions	274758000	USD
CY2019	rdfn	Inventory Net Transferred To Cost Of Revenue InventoryNetTransferredToCostOfRevenue	222909000	USD
CY2019	us-gaap	Inventory Write Down InventoryWriteDown	47000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	74590000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	68624000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	46717000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	29047000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	21530000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	39577000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	25187000	USD
CY2019	us-gaap	Depreciation Depreciation	8742000	USD
CY2018	us-gaap	Depreciation Depreciation	7977000	USD
CY2017	us-gaap	Depreciation Depreciation	6688000	USD
CY2019Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	8396000	USD
CY2018Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	5796000	USD
CY2017Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	4887000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	11618000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	20000	USD
CY2019	rdfn	Finance Lease Cost FinanceLeaseCost	23000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2180000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	14776000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	60000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	14252000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	60000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	13506000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	60000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	12541000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	46000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	10947000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	16914000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	82936000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	226000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	11865000	USD
CY2019Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	21000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	71071000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	205000	USD
CY2019	rdfn	Operating Lease Capitalized Interest Expense OperatingLeaseCapitalizedInterestExpense	10132000	USD
CY2019	rdfn	Financing Lease Capitalized Interest Expense FinancingLeaseCapitalizedInterestExpense	21000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y1M6D
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y9M18D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.044
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.054
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	9868000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	3000	USD
CY2019	rdfn	Finance Lease Cash Flows From Finance Lease Excluding Principal Payments And Interest FinanceLeaseCashFlowsFromFinanceLeaseExcludingPrincipalPaymentsAndInterest	14000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	58669000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	274000	USD
CY2019Q4	us-gaap	Other Commitment Due In Next Twelve Months OtherCommitmentDueInNextTwelveMonths	26048000	USD
CY2019Q4	us-gaap	Other Commitment Due In Second Year OtherCommitmentDueInSecondYear	4779000	USD
CY2019Q4	us-gaap	Other Commitment Due In Third Year OtherCommitmentDueInThirdYear	5148000	USD
CY2019Q4	us-gaap	Other Commitment Due In Fourth Year OtherCommitmentDueInFourthYear	0	USD
CY2019Q4	rdfn	Other Commitment Duein Fifth Yearand Thereafter OtherCommitmentDueinFifthYearandThereafter	0	USD
CY2019Q4	us-gaap	Other Commitment OtherCommitment	35975000	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
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	4880000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2074000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	2806000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	488000	USD
CY2019Q4	rdfn	Finite Lived Intangible Assets Amortization Expense Next Five Years FiniteLivedIntangibleAssetsAmortizationExpenseNextFiveYears	2318000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	488000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	366000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	30462000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	22862000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	7517000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	7975000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	37979000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	30837000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	7109000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	6226000	USD
CY2019Q4	rdfn	Miscellaneous Other Payables Current MiscellaneousOtherPayablesCurrent	775000	USD
CY2018Q4	rdfn	Miscellaneous Other Payables Current MiscellaneousOtherPayablesCurrent	318000	USD
CY2019Q4	rdfn	Other Payables Current OtherPayablesCurrent	7884000	USD
CY2018Q4	rdfn	Other Payables Current OtherPayablesCurrent	6544000	USD
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	9435349	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.48
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y21D
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	74669000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	150000	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	27.50
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1666162	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	5.74
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	116398	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	9.16
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	10608	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	8.75
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
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	7043042	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	6.35
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P5Y18D
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	104141000	USD
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	3573000	USD
CY2019	rdfn	Sharebased Compensation Arrangementby Sharebased Payment Award Equity Instruments Otherthan Options Vestedin Period Grant Date Fair Value SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedinPeriodGrantDateFairValue	4747000	USD
CY2018	rdfn	Sharebased Compensation Arrangementby Sharebased Payment Award Equity Instruments Otherthan Options Vestedin Period Grant Date Fair Value SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedinPeriodGrantDateFairValue	7089000	USD
CY2017	rdfn	Sharebased Compensation Arrangementby Sharebased Payment Award Equity Instruments Otherthan Options Vestedin Period Grant Date Fair Value SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedinPeriodGrantDateFairValue	10571000	USD
CY2019	rdfn	Sharebased Compensation Arrangementby Sharebased Payment Award Options Exercisedin Period Grant Date Fair Value SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsExercisedinPeriodGrantDateFairValue	20811000	USD
CY2018	rdfn	Sharebased Compensation Arrangementby Sharebased Payment Award Options Exercisedin Period Grant Date Fair Value SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsExercisedinPeriodGrantDateFairValue	49276000	USD
CY2017	rdfn	Sharebased Compensation Arrangementby Sharebased Payment Award Options Exercisedin Period Grant Date Fair Value SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsExercisedinPeriodGrantDateFairValue	9322000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	27814000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	20438000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	11101000	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
CY2017	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	268000	USD
CY2019	rdfn	Numberof Classesof Stock NumberofClassesofStock	1	class
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-41978000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-15002000	USD
CY2019	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	0	USD
CY2018	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	0	USD
CY2017	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	175915000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	49211000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	31311000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-80805000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-41978000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-190917000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	8638000	USD
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
CY2017	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	42722114	shares
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.88
CY2018	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.49
CY2017	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-4.47
CY2017Q3	rdfn	Conversion Of Stock Conversion Ratio ConversionOfStockConversionRatio	1
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	12815593	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	12700051	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	14162226	shares
CY2019	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	6655000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	5142000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	4073000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	2297000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	1873000	USD
CY2019Q4	rdfn	Deferred Tax Asset Lease Liability DeferredTaxAssetLeaseLiability	18404000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	795000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	3223000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	84487000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	47135000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	62274000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	38010000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	22213000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	9125000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	605000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	734000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1688000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1503000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	5359000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	6888000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	13579000	USD
CY2019Q4	rdfn	Deferred Tax Liabilities Fixed Assets DeferredTaxLiabilitiesFixedAssets	982000	USD
CY2018Q4	rdfn	Deferred Tax Liabilities Fixed Assets DeferredTaxLiabilitiesFixedAssets	0	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	22213000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	9125000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	0	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	0	USD
CY2019	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	24264000	USD
CY2018	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	8192000	USD
CY2017	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-8489000	USD
CY2017	rdfn	Operating Loss Carryforward Limitations On Use Decrease OperatingLossCarryforwardLimitationsOnUseDecrease	1506000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-41978000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-15002000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.3400
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0471
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0567
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0240
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.0120
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.0751
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.1474
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.0097
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.0057
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.0029
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.0245
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.0426
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.0708
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.2973
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.3733
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.2779
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.0134
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	-0.0054
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	-0.0066
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0.8437
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.8437
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1057000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1663000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	127000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	623000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	606000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2159000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1663000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	0	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2159000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1663000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD

Files In Submission

Name	View Source	Status
0001382821-20-000025-index-headers.html	Edgar Link	pending
0001382821-20-000025-index.html	Edgar Link	pending
0001382821-20-000025.txt	Edgar Link	pending
0001382821-20-000025-xbrl.zip	Edgar Link	pending
christiantaubmanoffer_image1.gif	Edgar Link	pending
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ex322201910-k.htm	Edgar Link	pending
ex42201910-k.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
performancegrapha01.jpg	Edgar Link	pending
R1.htm	Edgar Link	pending
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rdfn-20191231.xsd	Edgar Link	pending
rdfn-20191231_cal.xml	Edgar Link	unprocessable
rdfn-20191231_def.xml	Edgar Link	unprocessable
rdfn-20191231_lab.xml	Edgar Link	unprocessable
rdfn-20191231_pre.xml	Edgar Link	unprocessable
redfin10-k2019.htm	Edgar Link	pending
redfin10-k2019_htm.xml	Edgar Link	completed
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$RDFN
Redfin Corp Stock $rdfn

2019 Q4 Form 10-K Financial Statement

#000138282120000025 Filed on February 12, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$RDFN Redfin Corp Stock $rdfn

2019 Q4 Form 10-K Financial Statement

#000138282120000025 Filed on February 12, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$RDFN
Redfin Corp Stock $rdfn