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Share-Based Compensation - Additional Information (Detail) (USD $)
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3 Months Ended |
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Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2014
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May 11, 2015
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common shares authorized to be issued |
150,000,000us-gaap_CommonStockSharesAuthorized
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150,000,000us-gaap_CommonStockSharesAuthorized
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| Common stock reserved for future issuance |
9,483,890us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
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| Intrinsic value of outstanding exercisable options |
$ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
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| Options issued |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
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| Options exercised |
0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
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| Options forfeited |
0us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited
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| Options vested |
0us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
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| Options Expired |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod
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| Stock-based compensation expenses |
$ 534,000us-gaap_ShareBasedCompensation
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$ 132,000us-gaap_ShareBasedCompensation
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| Two Thousand Three Plan |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares of common stock vested and exercisable |
379,380us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThreePlanMember
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| Common stock reserved for future issuance |
379,380us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThreePlanMember
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| 2013 Plan |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common stock reserved for future issuance |
779,501us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
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| Common shares approved but unissued |
180,000us-gaap_CommonStockSharesSubscribedButUnissued
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
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| 2013 Plan | Amendment One |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common shares authorized to be issued |
3,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
/ us-gaap_StatementScenarioAxis
= rvlt_AmendmentOneMember
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| 2013 Plan | Stock Option |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Award options cumulative grants under The Plan |
35,000rvlt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCumulativeGrantsGross
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
/ rvlt_CommonEquityOfferingProgramAxis
= rvlt_StockOptionSharesMember
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| 2013 Plan | Restricted Stock |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Restricted shares cumulative award under The Plan |
2,220,499rvlt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCumulativeGrants
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
/ rvlt_CommonEquityOfferingProgramAxis
= us-gaap_RestrictedStockMember
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| 2013 Plan | Equity Option |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock awards vesting periods |
3 years
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| 2013 Plan | Equity Option | Minimum |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock options exercise price, percentage |
100.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_StockOptionMember
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| 2013 Plan | Equity Option | Maximum |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Grant expiration period |
10 years
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| 2013 Plan | Subsequent Event | Amendment Two |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common shares authorized to be issued |
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6,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
/ us-gaap_StatementScenarioAxis
= rvlt_AmendmentTwoMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
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| 2013 Plan | After giving effect to the May 2015 amendment |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common stock reserved for future issuance |
3,779,501us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
/ us-gaap_PlanNameAxis
= rvlt_TwentyFifteenSecondQuarterMember
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