Quarterly report pursuant to Section 13 or 15(d)

EMPLOYEE STOCK OPTIONS (Details Textual)

v2.4.1.9
EMPLOYEE STOCK OPTIONS (Details Textual) (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2013
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 2,136,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options $ 4,398,755us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 4 months 24 days      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value 621,550us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1      
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased $ 10.62us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased      
Compensation Expenses Charged Against Income For Share Based Awards Included In General And Administrative Expenses $ 654,688rei_CompensationExpensesChargedAgainstIncomeForShareBasedAwardsIncludedInGeneralAndAdministrativeExpenses $ 659,468rei_CompensationExpensesChargedAgainstIncomeForShareBasedAwardsIncludedInGeneralAndAdministrativeExpenses    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized       2,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized     5,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized