Organization and Business - Additional Information (Detail)	9 Months Ended
Sep. 30, 2016 Project
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of residential projects before merger	3
Percentage of ownership interest before merger	23.00%

Ownership interest in the Reis Services business prior to May 2007 Merger

No definition available.

Name:	reis_PercentageOfOwnershipPriorToMerger
Namespace Prefix:	reis_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant