$RDFN
Redfin Corp Stock $rdfn

$rdfn Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000138282122000034 Filed on February 17, 2022

Income Statement

Concept	2021 Q4	2021 Q1	2021
Revenue	$643.1M	$268.3M	$1.923B
YoY Change	163.01%	40.48%	116.99%
Cost Of Revenue	$535.0M	$226.0M	$1.519B
YoY Change	225.43%	26.86%	132.26%
Gross Profit	$108.0M	$42.36M	$403.8M
YoY Change	34.89%	228.89%	73.98%
Gross Profit Margin	16.8%	15.79%	21.0%
Selling, General & Admin	$133.3M	$49.19M	$357.1M
YoY Change	144.5%	-1.68%	142.86%
% of Gross Profit	123.33%	116.14%	88.42%
Research & Development		$27.68M	$156.7M
YoY Change		36.52%	85.91%
% of Gross Profit		65.34%	38.81%
Depreciation & Amortization	$14.60M	$4.341M	$46.91M
YoY Change	266.91%	31.27%	222.07%
% of Gross Profit	13.52%	10.25%	11.62%
Operating Expenses	$133.3M	$76.87M	$513.8M
YoY Change	144.5%	9.33%	122.11%
Operating Profit	-$25.21M	-$34.51M	-$110.0M
YoY Change	-198.47%	-39.9%	-13982.95%
Interest Expense	-$3.799M	$1.338M	$11.76M
YoY Change	-67.25%	-45.25%	-39.67%
% of Operating Profit
Other Income/Expense, Net	$1.261M	-$92.00K	$5.360M
YoY Change		-93.16%	-382.4%
Pretax Income	-$27.75M	-$35.80M	-$115.7M
YoY Change	-298.19%	-40.43%	525.51%
Income Tax	-$744.0K	$0.00	-$6.107M
% Of Pretax Income
Net Earnings	-$27.00M	-$35.78M	-$109.6M
YoY Change	-292.87%	-40.48%	491.64%
Net Earnings / Revenue	-4.2%	-13.34%	-5.7%
Basic Earnings Per Share		-$0.37	-$1.12
Diluted Earnings Per Share	-$255.3K	-$0.37	-$1.12
COMMON SHARES
Basic Shares Outstanding	105.5M shares	103.4M shares	104.7M shares
Diluted Shares Outstanding		103.4M shares	104.7M shares

Balance Sheet

Concept	2021 Q4	2021 Q1	2021
SHORT-TERM ASSETS
Cash & Short-Term Investments	$624.7M	$1.382B	$624.7M
YoY Change	-40.88%	378.25%	-40.88%
Cash & Equivalents	$591.0M	$1.241B	$591.0M
Short-Term Investments	$33.74M	$140.8M	$33.74M
Other Short-Term Assets	$7.524M	$7.014M	$193.5M
YoY Change	53.61%	33.78%	416.02%
Inventory	$358.2M	$97.37M	$358.2M
Prepaid Expenses	$22.95M	$15.22M
Receivables	$69.59M	$47.42M	$69.59M
Other Receivables	$0.00	$43.50M	$0.00
Total Short-Term Assets	$1.246B	$1.694B	$1.246B
YoY Change	0.42%	270.47%	0.42%
LONG-TERM ASSETS
Property, Plant & Equipment	$58.67M	$47.65M	$112.9M
YoY Change	33.38%	17.66%	28.12%
Goodwill	$409.4M
YoY Change	4356.59%
Intangibles	$185.9M
YoY Change	10060.05%
Long-Term Investments	$54.83M	$6.900M	$54.83M
YoY Change	360.74%	-74.16%	360.74%
Other Assets	$12.90M	$8.836M	$12.90M
YoY Change	49.65%	-0.98%	49.98%
Total Long-Term Assets	$775.9M	$122.2M	$775.9M
YoY Change	548.24%	-11.1%	548.21%
TOTAL ASSETS
Total Short-Term Assets	$1.246B	$1.694B	$1.246B
Total Long-Term Assets	$775.9M	$122.2M	$775.9M
Total Assets	$2.022B	$1.817B	$2.022B
YoY Change	48.62%	205.39%	48.62%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$12.55M	$15.57M	$12.55M
YoY Change	122.29%	435.17%	124.04%
Accrued Expenses	$118.1M	$75.75M	$126.5M
YoY Change	70.06%	29.59%	62.75%
Deferred Revenue
YoY Change
Short-Term Debt	$232.8M	$89.50M	$232.8M
YoY Change	269.56%	73.79%	269.56%
Long-Term Debt Due	$23.28M	$23.40M	$23.28M
YoY Change	3.47%		3.47%
Total Short-Term Liabilities	$401.8M	$236.0M	$401.8M
YoY Change	116.35%	73.39%	116.38%
LONG-TERM LIABILITIES
Long-Term Debt	$1.214B	$1.137B	$1.214B
YoY Change	148.62%	837.35%	148.62%
Other Long-Term Liabilities	$55.22M	$53.30M	$55.22M
YoY Change	12.01%	-6.98%	12.01%
Total Long-Term Liabilities	$1.269B	$1.190B	$1.269B
YoY Change	136.09%	566.46%	136.09%
TOTAL LIABILITIES
Total Short-Term Liabilities	$401.8M	$236.0M	$401.8M
Total Long-Term Liabilities	$1.269B	$1.190B	$1.269B
Total Liabilities	$1.672B	$1.433B	$1.672B
YoY Change	129.03%	355.46%	129.04%
SHAREHOLDERS EQUITY
Retained Earnings	-$372.2M	-$262.6M
YoY Change	37.68%	-15.82%
Common Stock	$106.0K	$104.0K
YoY Change	2.91%	10.64%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$309.9M	$343.6M	$349.7M
YoY Change
Total Liabilities & Shareholders Equity	$2.022B	$1.817B	$2.022B
YoY Change	48.62%	205.39%	48.62%

Cashflow Statement

Concept	2021 Q4	2021 Q1	2021
OPERATING ACTIVITIES
Net Income	-$27.00M	-$35.78M	-$109.6M
YoY Change	-292.87%	-40.48%	491.64%
Depreciation, Depletion And Amortization	$14.60M	$4.341M	$46.91M
YoY Change	266.91%	31.27%	222.07%
Cash From Operating Activities	$112.6M	-$50.77M	-$301.6M
YoY Change	1056.76%	16.84%	-592.22%
INVESTING ACTIVITIES
Capital Expenditures	-$6.917M	$5.285M	$27.49M
YoY Change	60.86%	55.17%	87.2%
Acquisitions			$608.0M
YoY Change
Other Investing Activities	-$6.527M	-$4.290M	-$548.8M
YoY Change	-296.01%	7050.0%	1193.46%
Cash From Investing Activities	-$13.44M	-$9.573M	-$576.3M
YoY Change	1285.98%	176.04%	908.96%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$0.00
YoY Change			-100.0%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-18.07M	$457.6M	$650.3M
YoY Change	-103.29%	1414.81%	-6.32%
NET CHANGE
Cash From Operating Activities	112.6M	-$50.77M	-$301.6M
Cash From Investing Activities	-13.44M	-$9.573M	-$576.3M
Cash From Financing Activities	-18.07M	$457.6M	$650.3M
Net Change In Cash	81.04M	$397.2M	-$227.5M
YoY Change	-85.47%	-2473.48%	-132.58%
FREE CASH FLOW
Cash From Operating Activities	$112.6M	-$50.77M	-$301.6M
Capital Expenditures	-$6.917M	$5.285M	$27.49M
Free Cash Flow	$119.5M	-$56.05M	-$329.1M
YoY Change	751.53%	19.62%	-806.43%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0001382821
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList
CY2020Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList
CY2021Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList
CY2020Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	001-38160
CY2021	dei	Entity Registrant Name EntityRegistrantName	Redfin Corporation
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	74-3064240
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	1099 Stewart Street
CY2021	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 600
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Seattle
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98101
CY2021	dei	City Area Code CityAreaCode	(206)
CY2021	dei	Local Phone Number LocalPhoneNumber	576-8333
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $0.001 par value per share
CY2021	dei	Trading Symbol TradingSymbol	RDFN
CY2021	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	6440535375	USD
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	106396652	shares
CY2021	dei	Auditor Firm AuditorFirmId	34
CY2021	dei	Auditor Name AuditorName	Deloitte & Touche LLP
CY2021	dei	Auditor Location AuditorLocation	Seattle, Washington
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	591003000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	925276000	USD
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	127278000	USD
CY2020Q4	us-gaap	Restricted Cash RestrictedCash	20544000	USD
CY2021Q4	us-gaap	Short Term Investments ShortTermInvestments	33737000	USD
CY2020Q4	us-gaap	Short Term Investments ShortTermInvestments	131561000	USD
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1298000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	160000	USD
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	69594000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	54719000	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	358221000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	49158000	USD
CY2021Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	35759000	USD
CY2020Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	42539000	USD
CY2021Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	22948000	USD
CY2020Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	12131000	USD
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	7524000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	4898000	USD
CY2021Q4	us-gaap	Assets Current AssetsCurrent	1246064000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	1240826000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	58671000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	43988000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	54200000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	44149000	USD
CY2021Q4	us-gaap	Long Term Investments LongTermInvestments	54828000	USD
CY2020Q4	us-gaap	Long Term Investments LongTermInvestments	11922000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	409382000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	9186000	USD
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	185929000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1830000	USD
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	12898000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	8619000	USD
CY2021Q4	us-gaap	Assets Assets	2021972000	USD
CY2020Q4	us-gaap	Assets Assets	1360520000	USD
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	12546000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	5644000	USD
CY2021Q4	rdfn	Accrued And Other Liabilities Current AccruedAndOtherLiabilitiesCurrent	118122000	USD
CY2020Q4	rdfn	Accrued And Other Liabilities Current AccruedAndOtherLiabilitiesCurrent	82644000	USD
CY2021Q4	us-gaap	Warehouse Agreement Borrowings WarehouseAgreementBorrowings	33043000	USD
CY2020Q4	us-gaap	Warehouse Agreement Borrowings WarehouseAgreementBorrowings	39029000	USD
CY2021Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	199781000	USD
CY2020Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	23949000	USD
CY2021Q4	us-gaap	Convertible Debt Current ConvertibleDebtCurrent	23280000	USD
CY2020Q4	us-gaap	Convertible Debt Current ConvertibleDebtCurrent	22482000	USD
CY2021Q4	rdfn	Operating And Finance Lease Liability Current OperatingAndFinanceLeaseLiabilityCurrent	15040000	USD
CY2020Q4	rdfn	Operating And Finance Lease Liability Current OperatingAndFinanceLeaseLiabilityCurrent	11973000	USD
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	401812000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	185721000	USD
CY2021Q4	rdfn	Operating And Finance Lease Liability Noncurrent OperatingAndFinanceLeaseLiabilityNoncurrent	55222000	USD
CY2020Q4	rdfn	Operating And Finance Lease Liability Noncurrent OperatingAndFinanceLeaseLiabilityNoncurrent	49339000	USD
CY2021Q4	us-gaap	Convertible Debt Noncurrent ConvertibleDebtNoncurrent	1214017000	USD
CY2020Q4	us-gaap	Convertible Debt Noncurrent ConvertibleDebtNoncurrent	488268000	USD
CY2021Q4	rdfn	Accrued Payroll Taxes Noncurrent AccruedPayrollTaxesNoncurrent	0	USD
CY2020Q4	rdfn	Accrued Payroll Taxes Noncurrent AccruedPayrollTaxesNoncurrent	6812000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	1201000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	0	USD
CY2021Q4	us-gaap	Liabilities Liabilities	1672252000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	730140000	USD
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	0.001
CY2021Q4	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	0.001
CY2021Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2020Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2021Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	40000	shares
CY2021Q4	us-gaap	Temporary Equity Shares Issued TemporaryEquitySharesIssued	40000	shares
CY2020Q4	us-gaap	Temporary Equity Shares Issued TemporaryEquitySharesIssued	40000	shares
CY2020Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	40000	shares
CY2021Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	39868000	USD
CY2020Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	39823000	USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	106308767	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	106308767	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	103000594	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	103000594	shares
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	106000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	103000	USD
CY2021Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	682084000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	860556000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-174000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	211000	USD
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-372164000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-270313000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	309852000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	590557000	USD
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2021972000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1360520000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1922765000	USD
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
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1518945000	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
CY2021	us-gaap	Gross Profit GrossProfit	403820000	USD
CY2020	us-gaap	Gross Profit GrossProfit	232110000	USD
CY2019	us-gaap	Gross Profit GrossProfit	144103000	USD
CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	156718000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	84297000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	69765000	USD
CY2021	us-gaap	Marketing Expense MarketingExpense	138740000	USD
CY2020	us-gaap	Marketing Expense MarketingExpense	54881000	USD
CY2019	us-gaap	Marketing Expense MarketingExpense	76710000	USD
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	218315000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	92140000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	76874000	USD
CY2021	us-gaap	Operating Expenses OperatingExpenses	513773000	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	231318000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	223349000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	-109953000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	792000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	-79246000	USD
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	635000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	2074000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	7146000	USD
CY2021	us-gaap	Interest Expense InterestExpense	11762000	USD
CY2020	us-gaap	Interest Expense InterestExpense	19495000	USD
CY2019	us-gaap	Interest Expense InterestExpense	8928000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-6107000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5360000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1898000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	223000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-109613000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-18527000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2021	us-gaap	Temporary Equity Dividends Adjustment TemporaryEquityDividendsAdjustment	7269000	USD
CY2020	us-gaap	Temporary Equity Dividends Adjustment TemporaryEquityDividendsAdjustment	4454000	USD
CY2019	us-gaap	Temporary Equity Dividends Adjustment TemporaryEquityDividendsAdjustment	0	USD
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-116882000	USD
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-116882000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-22981000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-22981000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-80805000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-80805000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.12
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.12
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.23
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.23
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.88
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.88
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	104683460	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	104683460	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	98574529	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	98574529	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	91583533	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	91583533	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-109613000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-18527000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	6000	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
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	379000	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
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-109228000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-18358000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-80763000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-109613000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-18527000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	46906000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	14564000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	9230000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	54722000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	36973000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	27814000	USD
CY2021	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	4989000	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
CY2021	rdfn	Operating Lease Non Cash Lease Expense OperatingLeaseNonCashLeaseExpense	11630000	USD
CY2020	rdfn	Operating Lease Non Cash Lease Expense OperatingLeaseNonCashLeaseExpense	9204000	USD
CY2019	rdfn	Operating Lease Non Cash Lease Expense OperatingLeaseNonCashLeaseExpense	6940000	USD
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	2063000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	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
CY2021	rdfn	Gain Loss On Interest Rate Lock Commitments Forward Sales Commitments And Fair Value Adjustment Of Loans Held For Sale GainLossOnInterestRateLockCommitmentsForwardSalesCommitmentsAndFairValueAdjustmentOfLoansHeldForSale	815000	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
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-4227000	USD
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-349000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-662000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	7149000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	35496000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3861000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	309063000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-25432000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	51896000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	12248000	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
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3059000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2086000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-394000	USD
CY2021	rdfn	Increase Decrease In Accrued And Other Liabilities IncreaseDecreaseInAccruedAndOtherLiabilities	25791000	USD
CY2020	rdfn	Increase Decrease In Accrued And Other Liabilities IncreaseDecreaseInAccruedAndOtherLiabilities	39092000	USD
CY2019	rdfn	Increase Decrease In Accrued And Other Liabilities IncreaseDecreaseInAccruedAndOtherLiabilities	7422000	USD
CY2021	rdfn	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-13268000	USD
CY2020	rdfn	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-11312000	USD
CY2019	rdfn	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-7209000	USD
CY2021	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	986982000	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
CY2021	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	993070000	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
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-301568000	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
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	27492000	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
CY2021	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	146274000	USD
CY2020	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	198172000	USD
CY2019	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	136265000	USD
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	98687000	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
CY2021	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	106773000	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
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	608000000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-576306000	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
CY2021	rdfn	Proceeds From Issuance Of Temporary Equity ProceedsFromIssuanceOfTemporaryEquity	0	USD
CY2020	rdfn	Proceeds From Issuance Of Temporary Equity ProceedsFromIssuanceOfTemporaryEquity	39801000	USD
CY2019	rdfn	Proceeds From Issuance Of Temporary Equity ProceedsFromIssuanceOfTemporaryEquity	0	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	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
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	22772000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	21072000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	16107000	USD
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	27066000	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
CY2021	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	942993000	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
CY2021	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	948979000	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	644551000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	372017000	USD
CY2021	us-gaap	Proceeds From Secured Lines Of Credit ProceedsFromSecuredLinesOfCredit	624828000	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
CY2021	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	448996000	USD
CY2020	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	70115000	USD
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	0	USD
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	527000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	4000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	922000	USD
CY2021	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	561529000	USD
CY2020	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	647486000	USD
CY2019	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2021	rdfn	Purchase Of Capped Call Related To Convertible Debt PurchaseOfCappedCallRelatedToConvertibleDebt	62647000	USD
CY2020	rdfn	Purchase Of Capped Call Related To Convertible Debt PurchaseOfCappedCallRelatedToConvertibleDebt	0	USD
CY2019	rdfn	Purchase Of Capped Call Related To Convertible Debt PurchaseOfCappedCallRelatedToConvertibleDebt	0	USD
CY2021	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	2159000	USD
CY2020	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	108061000	USD
CY2019	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	796000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	221000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	72000	USD
CY2021	rdfn	Proceeds From Customer Escrow Deposits ProceedsFromCustomerEscrowDeposits	-10611000	USD
CY2020	rdfn	Proceeds From Customer Escrow Deposits ProceedsFromCustomerEscrowDeposits	4074000	USD
CY2019	rdfn	Proceeds From Customer Escrow Deposits ProceedsFromCustomerEscrowDeposits	883000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	650341000	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
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-6000	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
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-227539000	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
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
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	718281000	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
CY2021	us-gaap	Interest Paid Net InterestPaidNet	7592000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	4958000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	2460000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	4059000	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
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	659000	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
CY2021	rdfn	Leasehold Improvements Paid Directly By Lessor LeaseholdImprovementsPaidDirectlyByLessor	1334000	USD
CY2020	rdfn	Leasehold Improvements Paid Directly By Lessor LeaseholdImprovementsPaidDirectlyByLessor	37000	USD
CY2019	rdfn	Leasehold Improvements Paid Directly By Lessor LeaseholdImprovementsPaidDirectlyByLessor	6230000	USD
CY2021	rdfn	Issuance Of Common Stock For Repurchase And Conversions Of Convertible Senior Notes IssuanceOfCommonStockForRepurchaseAndConversionsOfConvertibleSeniorNotes	0	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
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	591003000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	925276000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	234679000	USD
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	127278000	USD
CY2020Q4	us-gaap	Restricted Cash RestrictedCash	20544000	USD
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	12769000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	718281000	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	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	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	5126000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	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	Stockholders Equity StockholdersEquity	331446000	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	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 Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	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	Stockholders Equity StockholdersEquity	590557000	USD
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	13787000	USD
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	8980000	USD
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	27067000	USD
CY2021	rdfn	Adjustments To Additional Paid In Capital Purchase Of Capped Calls Related To Convertible Debt AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallsRelatedToConvertibleDebt	62647000	USD
CY2021	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities Net Of Adjustments StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments	-63000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	58781000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-385000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-109613000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	309852000	USD
CY2021	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	Certain amounts presented in the prior period consolidated balance sheets have been reclassified to conform to the current period financial statement presentation. The change in classification does not affect previously reported total assets, total liabilities, mezzanine equity, or stockholders' equity in the consolidated balance sheets. Additionally, amounts presented in the prior period consolidated statements of cash flows have been reclassified to conform to the current period financial statement presentation. The change in classification does not affect previously reported cash flows from operating activities, investing activities, or financing activities in the consolidated statements of cash flows.
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates</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 allocating and evaluating goodwill for impairment, current expected credit losses on certain financial assets, and fair value of assets acquired and liabilities assumed in connection with our acquisition of RentPath. 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>
CY2021	rdfn	Material Classes Of Receivables MaterialClassesOfReceivables	3	classOfReceivable
CY2021	rdfn	Number Of Types Of Investments NumberOfTypesOfInvestments	2	investment
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Concentration of Credit Risk</span><span style="color:#000000;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>
CY2021	rdfn	Numberof Inventory Categories NumberofInventoryCategories	3	category
CY2021	rdfn	Inventory Real Estate Rental Period InventoryRealEstateRentalPeriod	P30D
CY2021Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	660000	USD
CY2020Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	1353000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	409382000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	9186000	USD
CY2021Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	0	USD
CY2021Q4	us-gaap	Lessee Finance Lease Term Of Contract1 LesseeFinanceLeaseTermOfContract1	P4Y
CY2021	us-gaap	Advertising Expense AdvertisingExpense	119278000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	42919000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	62536000	USD
CY2021	rdfn	Advertising Production Costs AdvertisingProductionCosts	2303000	USD
CY2020	rdfn	Advertising Production Costs AdvertisingProductionCosts	256000	USD
CY2019	rdfn	Advertising Production Costs AdvertisingProductionCosts	2029000	USD
CY2020Q4	us-gaap	Convertible Debt Current ConvertibleDebtCurrent	22482000	USD
CY2021Q1	us-gaap	Convertible Debt Current ConvertibleDebtCurrent	25205000	USD
CY2020Q4	us-gaap	Convertible Debt Noncurrent ConvertibleDebtNoncurrent	488268000	USD
CY2021Q1	us-gaap	Convertible Debt Noncurrent ConvertibleDebtNoncurrent	648023000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	860556000	USD
CY2021Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	690316000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-270313000	USD
CY2021Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-262551000	USD
CY2021	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	7925000	USD
CY2021	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	6	segment
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1922765000	USD
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
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1518945000	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
CY2021	us-gaap	Gross Profit GrossProfit	403820000	USD
CY2020	us-gaap	Gross Profit GrossProfit	232110000	USD
CY2019	us-gaap	Gross Profit GrossProfit	144103000	USD
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	635000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	2074000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	7146000	USD
CY2021	us-gaap	Interest Expense InterestExpense	11762000	USD
CY2020	us-gaap	Interest Expense InterestExpense	19495000	USD
CY2019	us-gaap	Interest Expense InterestExpense	8928000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-6107000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5360000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1898000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	223000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-109613000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-18527000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet	0	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet	0	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet	0	USD
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet	0	USD
CY2020Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	1771000	USD
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues	18415000	USD
CY2021Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	1131000	USD
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	18827000	USD
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	-228000	USD
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Other Comprehensive Income FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome	-641000	USD
CY2021Q4	us-gaap	Share Price SharePrice	38.39
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	54671000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	0	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	204000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	0	USD
CY2021Q4	us-gaap	Interest Receivable InterestReceivable	86000	USD
CY2020Q4	us-gaap	Interest Receivable InterestReceivable	108000	USD
CY2021Q4	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
CY2021Q4	us-gaap	Inventory Real Estate Held For Sale InventoryRealEstateHeldForSale	119410000	USD
CY2020Q4	us-gaap	Inventory Real Estate Held For Sale InventoryRealEstateHeldForSale	17153000	USD
CY2021Q4	rdfn	Inventory Real Estate Not Available For Sale InventoryRealEstateNotAvailableForSale	16377000	USD
CY2020Q4	rdfn	Inventory Real Estate Not Available For Sale InventoryRealEstateNotAvailableForSale	7225000	USD
CY2021Q4	us-gaap	Inventory Real Estate Construction In Process InventoryRealEstateConstructionInProcess	222434000	USD
CY2020Q4	us-gaap	Inventory Real Estate Construction In Process InventoryRealEstateConstructionInProcess	24780000	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	358221000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	49158000	USD
CY2021	us-gaap	Inventory Write Down InventoryWriteDown	2364000	USD
CY2020	us-gaap	Inventory Write Down InventoryWriteDown	29000	USD
CY2021	rdfn	Number Of Homes Purchased NumberOfHomesPurchased	2021	home
CY2021	rdfn	Inventory Net Additions InventoryNetAdditions	1034916000	USD
CY2021	rdfn	Number Of Homes Sold NumberOfHomesSold	1450	home
CY2021	rdfn	Inventory Net Sales InventoryNetSales	738809000	USD
CY2020	rdfn	Number Of Homes Purchased NumberOfHomesPurchased	394	home
CY2020	rdfn	Inventory Net Additions InventoryNetAdditions	158269000	USD
CY2020	rdfn	Number Of Homes Sold NumberOfHomesSold	453	home
CY2020	rdfn	Inventory Net Sales InventoryNetSales	182906000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	59766000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	41614000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	58671000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	43988000	USD
CY2021	us-gaap	Depreciation Depreciation	20047000	USD
CY2020	us-gaap	Depreciation Depreciation	14076000	USD
CY2019	us-gaap	Depreciation Depreciation	8742000	USD
CY2021Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	19175000	USD
CY2020Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	11414000	USD
CY2019Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	8396000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	15560000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	12941000	USD
CY2021	rdfn	Finance Lease Cost FinanceLeaseCost	565000	USD
CY2020	rdfn	Finance Lease Cost FinanceLeaseCost	150000	USD
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1464000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	998000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	17234000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	574000	USD
CY2021Q4	rdfn	Lessee Operating Lease Liability Other Payments Due Year One LesseeOperatingLeaseLiabilityOtherPaymentsDueYearOne	929000	USD
CY2021Q4	rdfn	Lessee Lease Liability Payments Due Year One LesseeLeaseLiabilityPaymentsDueYearOne	18737000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	16224000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	561000	USD
CY2021Q4	rdfn	Lessee Operating Lease Liability Other Payments Due Year Two LesseeOperatingLeaseLiabilityOtherPaymentsDueYearTwo	334000	USD
CY2021Q4	rdfn	Lessee Lease Liability Payments Due Year Two LesseeLeaseLiabilityPaymentsDueYearTwo	17119000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	14653000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	475000	USD
CY2021Q4	rdfn	Lessee Operating Lease Liability Other Payments Due Year Three LesseeOperatingLeaseLiabilityOtherPaymentsDueYearThree	312000	USD
CY2021Q4	rdfn	Lessee Lease Liability Payments Due Year Three LesseeLeaseLiabilityPaymentsDueYearThree	15440000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	11233000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	156000	USD
CY2021Q4	rdfn	Lessee Operating Lease Liability Other Payments Due Year Four LesseeOperatingLeaseLiabilityOtherPaymentsDueYearFour	193000	USD
CY2021Q4	rdfn	Lessee Lease Liability Payments Due Year Four LesseeLeaseLiabilityPaymentsDueYearFour	11582000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	10495000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2021Q4	rdfn	Lessee Operating Lease Liability Other Payments Due Year Five LesseeOperatingLeaseLiabilityOtherPaymentsDueYearFive	18000	USD
CY2021Q4	rdfn	Lessee Lease Liability Payments Due Year Five LesseeLeaseLiabilityPaymentsDueYearFive	10513000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	6434000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2021Q4	rdfn	Lessee Operating Lease Liability Other Payments Due After Year Five LesseeOperatingLeaseLiabilityOtherPaymentsDueAfterYearFive	0	USD
CY2021Q4	rdfn	Lessee Lease Liability Payments Due After Year Five LesseeLeaseLiabilityPaymentsDueAfterYearFive	6434000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	76273000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	1766000	USD
CY2021Q4	rdfn	Lessee Operating Lease Liability Other Payments Due LesseeOperatingLeaseLiabilityOtherPaymentsDue	1786000	USD
CY2021Q4	rdfn	Lessee Lease Liability Payments Due LesseeLeaseLiabilityPaymentsDue	79825000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	7636000	USD
CY2021Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	141000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	68637000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	1625000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1186000	USD
CY2021	rdfn	Operating Lease Capitalized Interest Expense OperatingLeaseCapitalizedInterestExpense	2674000	USD
CY2021	rdfn	Financing Lease Capitalized Interest Expense FinancingLeaseCapitalizedInterestExpense	73000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y9M18D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y2M12D
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y2M12D
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y6M
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.044
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.044
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.054
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.054
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	16421000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	14207000	USD
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	83000	USD
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	20000	USD
CY2021	rdfn	Finance Lease Cash Flows From Finance Lease Excluding Principal Payments And Interest FinanceLeaseCashFlowsFromFinanceLeaseExcludingPrincipalPaymentsAndInterest	347000	USD
CY2020	rdfn	Finance Lease Cash Flows From Finance Lease Excluding Principal Payments And Interest FinanceLeaseCashFlowsFromFinanceLeaseExcludingPrincipalPaymentsAndInterest	102000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	7677000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	1333000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	669000	USD
CY2020Q4	us-gaap	Loss Contingency Number Of Plaintiffs LossContingencyNumberOfPlaintiffs	10	plaintiff
CY2021Q4	us-gaap	Escrow Deposit EscrowDeposit	9905000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	215880000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	29951000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	185929000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	4880000	USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	3050000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1830000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	26901000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	488000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	35705000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	35705000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	20458000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	15050000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	15050000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	63961000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	185929000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	9186000	USD
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	400196000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	409382000	USD
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	78437000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	49238000	USD
CY2021Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	25217000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	22906000	USD
CY2021Q4	rdfn	Accrued Payroll Taxes Current Cares Act AccruedPayrollTaxesCurrentCARESAct	7760000	USD
CY2020Q4	rdfn	Accrued Payroll Taxes Current Cares Act AccruedPayrollTaxesCurrentCARESAct	6812000	USD
CY2021Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	6708000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	3688000	USD
CY2021Q4	rdfn	Accrued And Other Liabilities Current AccruedAndOtherLiabilitiesCurrent	118122000	USD
CY2020Q4	rdfn	Accrued And Other Liabilities Current AccruedAndOtherLiabilitiesCurrent	82644000	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
CY2021Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	39868000	USD
CY2021	rdfn	Temporary Equity Dividends Shares TemporaryEquityDividendsShares	30640	shares
CY2020Q2	us-gaap	Convertible Preferred Stock Shares Issued Upon Conversion ConvertiblePreferredStockSharesIssuedUponConversion	2622177	shares
CY2021	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.00055
CY2021	us-gaap	Preferred Stock Dividend Rate Per Dollar Amount PreferredStockDividendRatePerDollarAmount	17.95
CY2021Q4	rdfn	Temporary Equity Conversion Price Ratio Denominator TemporaryEquityConversionPriceRatioDenominator	19.51	USD
CY2021	rdfn	Temporary Equity Conversion Stock Price Trigger TemporaryEquityConversionStockPriceTrigger	27.32	shares
CY2021	rdfn	Temporary Equity Threshold Consecutive Trading Days TemporaryEquityThresholdConsecutiveTradingDays	30	D
CY2021	rdfn	Temporary Equity Threshold Consecutive Trading Days TemporaryEquityThresholdConsecutiveTradingDays	30	D
CY2021	rdfn	Temporary Equity Threshold Consecutive Trading Days TemporaryEquityThresholdConsecutiveTradingDays	30	D
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2021Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2020Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2020Q4	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	0.001
CY2021Q4	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	0.001
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	5733738	shares
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
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1709324	shares
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	5.34
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	5403	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	10.80
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	4019011	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	8.02
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y8M23D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	122038000	USD
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	3869011	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	7.27
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y7M2D
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	120404000	USD
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	793000	USD
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	2228000	USD
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	4747000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	90920000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	55822000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	20811000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	54722000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	36973000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	27814000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	4059000	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
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-109613000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-18527000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-80805000	USD
CY2021	us-gaap	Temporary Equity Dividends Adjustment TemporaryEquityDividendsAdjustment	7269000	USD
CY2020	us-gaap	Temporary Equity Dividends Adjustment TemporaryEquityDividendsAdjustment	4454000	USD
CY2019	us-gaap	Temporary Equity Dividends Adjustment TemporaryEquityDividendsAdjustment	0	USD
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-116882000	USD
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-116882000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-22981000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-22981000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-80805000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-80805000	USD
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	104683460	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	104683460	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	98574529	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	98574529	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	91583533	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	91583533	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.12
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	7117000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	6011000	USD
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.12
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.23
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.23
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.88
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.88
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	26686190	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	22175834	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	12815593	shares
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	143917000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	57763000	USD
CY2021Q4	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	35234000	USD
CY2020Q4	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	0	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	18828000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	12422000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	7606000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	7026000	USD
CY2021Q4	rdfn	Deferred Tax Asset Lease Liability DeferredTaxAssetLeaseLiability	17396000	USD
CY2020Q4	rdfn	Deferred Tax Asset Lease Liability DeferredTaxAssetLeaseLiability	17540000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	4542000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	1004000	USD
CY2021Q4	rdfn	Deferred Tax Assets Fixed Assets DeferredTaxAssetsFixedAssets	3887000	USD
CY2020Q4	rdfn	Deferred Tax Assets Fixed Assets DeferredTaxAssetsFixedAssets	1075000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	238527000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	102841000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	176872000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	44307000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	61655000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	58534000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	48250000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	514000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	0	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	45616000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	13465000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	12404000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1141000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	0	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	62856000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	58534000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1201000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	0	USD
CY2021	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	132565000	USD
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-17967000	USD
CY2019	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	24264000	USD
CY2017Q1	rdfn	Operating Loss Carryforwards Limitations On Use Value OperatingLossCarryforwardsLimitationsOnUseValue	1506000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0906
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.2523
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0471
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.1488
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.6914
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.0120
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.0012
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.0103
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.0097
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.0541
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.2042
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.2973
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.0245
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.4189
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-1.3288
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.0162
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.0132
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.0134
CY2021	rdfn	Effective Income Tax Rate Reconciliation Acquisition Costs Percent EffectiveIncomeTaxRateReconciliationAcquisitionCostsPercent	-0.0144
CY2020	rdfn	Effective Income Tax Rate Reconciliation Acquisition Costs Percent EffectiveIncomeTaxRateReconciliationAcquisitionCostsPercent	0
CY2019	rdfn	Effective Income Tax Rate Reconciliation Acquisition Costs Percent EffectiveIncomeTaxRateReconciliationAcquisitionCostsPercent	0
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.0320
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.0528
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.2523
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.2523
CY2021	rdfn	Effective Income Tax Rate Reconciliation Effective State Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationEffectiveStateIncomeTaxRatePercent	0
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1215000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1215000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	0	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-7322000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7322000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-6107000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3105000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2159000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	32000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1555000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	946000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4692000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3105000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	0	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	0	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4692000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3105000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	USD
CY2021	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
CY2021Q4	rdfn	Adjustments To Additional Paid In Capital Convertible Debt Capped Call Transaction AdjustmentsToAdditionalPaidInCapitalConvertibleDebtCappedCallTransaction	62647000	USD

Files In Submission

Name	View Source	Status
0001382821-22-000034-index-headers.html	Edgar Link	pending
0001382821-22-000034-index.html	Edgar Link	pending
0001382821-22-000034.txt	Edgar Link	pending
0001382821-22-000034-xbrl.zip	Edgar Link	pending
ex1011202110-k.htm	Edgar Link	pending
ex211202110-k.htm	Edgar Link	pending
ex231202110-k.htm	Edgar Link	pending
ex311202110-k.htm	Edgar Link	pending
ex312202110-k.htm	Edgar Link	pending
ex321202110-k.htm	Edgar Link	pending
ex322202110-k.htm	Edgar Link	pending
ex41202110-k.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
image_0.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
R92.htm	Edgar Link	pending
R93.htm	Edgar Link	pending
R94.htm	Edgar Link	pending
rdfn-20211231.htm	Edgar Link	pending
rdfn-20211231.xsd	Edgar Link	pending
rdfn-20211231_cal.xml	Edgar Link	unprocessable
rdfn-20211231_def.xml	Edgar Link	unprocessable
rdfn-20211231_g1.jpg	Edgar Link	pending
rdfn-20211231_htm.xml	Edgar Link	completed
rdfn-20211231_lab.xml	Edgar Link	unprocessable
rdfn-20211231_pre.xml	Edgar Link	unprocessable
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$RDFN
Redfin Corp Stock $rdfn

2021 Q4 Form 10-K Financial Statement

#000138282122000034 Filed on February 17, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$RDFN Redfin Corp Stock $rdfn

2021 Q4 Form 10-K Financial Statement

#000138282122000034 Filed on February 17, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$RDFN
Redfin Corp Stock $rdfn