XML 61 R50.htm IDEA: XBRL DOCUMENT v3.8.0.1

Net Income (Loss) per Share Attributable to Common Stock - Narrative (Details)	Aug. 02, 2017
Earnings Per Share [Abstract]
Conversion basis	1

X

- Definition

Conversion of Stock, Conversion Ratio

+ References

No definition available.

+ Details

Name:	rdfn_ConversionOfStockConversionRatio
Namespace Prefix:	rdfn_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_EarningsPerShareAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration