Income Taxes - Components of Income Tax Expense (Benefit) (Parenthetical) (Detail) - Jun. 30, 2015 - USD ($)	Total	Total
Income Tax Disclosure [Abstract]
Deferred Federal AMT expense (benefit)	$ (81,000)	$ (119,000)

Amount of Federal AMT tax expense (benefit) during the period.

No definition available.

Name:	reis_DeferredFederalAlternativeMinimumTaxExpenseBenefit
Namespace Prefix:	reis_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration