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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Summary Of Significant Accounting Policies [Line Items]        
Variable interest entity No No No  
Maturity period of demand and money market accounts and short term investments Three months or less      
Depreciation expense $ 382,829us-gaap_Depreciation $ 332,576us-gaap_Depreciation $ 354,953us-gaap_Depreciation  
Goodwill impairment identified 0us-gaap_GoodwillImpairmentLoss 0us-gaap_GoodwillImpairmentLoss 0us-gaap_GoodwillImpairmentLoss  
Intangible asset impairment 0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill 0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill 0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill  
Fair value of assets 0us-gaap_AssetsFairValueDisclosure 0us-gaap_AssetsFairValueDisclosure 0us-gaap_AssetsFairValueDisclosure  
Fair value of liabilities 0us-gaap_LiabilitiesFairValueDisclosure 0us-gaap_LiabilitiesFairValueDisclosure 0us-gaap_LiabilitiesFairValueDisclosure  
Subscription contractual period 1 year      
Company's share of Mobiuss subscription 50.00%reis_ShareOfValueOfSubscription      
Outstanding options 582,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 627,724us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 645,448us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 663,172us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options settled in cash or stock 0reis_OptionsExercisableWhichCanBeSettledInCashShare 17,724reis_OptionsExercisableWhichCanBeSettledInCashShare 35,448reis_OptionsExercisableWhichCanBeSettledInCashShare  
Liability for option cancellations $ 0reis_LiabilityForOptionCancellations $ 268,341reis_LiabilityForOptionCancellations    
Minimum [Member] | Furniture and Fixtures [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Expected useful life of assets 3 years      
Maximum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Subscription contractual period 48 months      
Maximum [Member] | Furniture and Fixtures [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Expected useful life of assets 10 years      
Web Site Development [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Intangible assets, amortization period 3 years      
Database [Member] | Minimum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Intangible assets, amortization period 3 years      
Database [Member] | Maximum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Intangible assets, amortization period 5 years      
Customer Relationships [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Intangible assets, amortization period 15 years      
Lease Value [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Remaining term of acquired office lease at the time of the Merger 9 years