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Stock Option Plans - Additional Information (Detail) (USD $)
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12 Months Ended |
0 Months Ended |
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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May 31, 2013
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Apr. 21, 2014
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common stock, issued |
129,714,000us-gaap_CommonStockSharesIssued
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82,095,000us-gaap_CommonStockSharesIssued
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| Granted |
52,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
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54,250us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
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| Grant date weighted average fair value options |
$ 3.02us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
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$ 0.39us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
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| Total intrinsic value |
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$ 95,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
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| Number of options exercised |
0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
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108,146us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
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0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
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| Intrinsic value of outstanding exercisable options |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
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| Total fair value of shares vested |
1,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
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2,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
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158,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
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| Unrecognized compensation expense for restricted stock |
1,670,240rvlt_EmployeeServiceShareBasedCompensationUnrecognizedCompensationCostsOnRestrictedStockAwards
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| Stock-based compensation expenses |
1,711,000us-gaap_ShareBasedCompensation
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809,000us-gaap_ShareBasedCompensation
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45,000us-gaap_ShareBasedCompensation
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| Employees |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock-based compensation expenses |
1,751,000us-gaap_ShareBasedCompensation
/ us-gaap_TitleOfIndividualAxis
= rvlt_EmployeesMember
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302,000us-gaap_ShareBasedCompensation
/ us-gaap_TitleOfIndividualAxis
= rvlt_EmployeesMember
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45,000us-gaap_ShareBasedCompensation
/ us-gaap_TitleOfIndividualAxis
= rvlt_EmployeesMember
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| Non Employees |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock-based compensation expenses |
(40,000)us-gaap_ShareBasedCompensation
/ us-gaap_TitleOfIndividualAxis
= rvlt_NonEmployeesMember
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506,000us-gaap_ShareBasedCompensation
/ us-gaap_TitleOfIndividualAxis
= rvlt_NonEmployeesMember
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0us-gaap_ShareBasedCompensation
/ us-gaap_TitleOfIndividualAxis
= rvlt_NonEmployeesMember
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| Bonus and Commissions |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock-based compensation expenses |
911,000us-gaap_ShareBasedCompensation
/ us-gaap_TitleOfIndividualAxis
= rvlt_CommissionsMember
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| Performance Based Stock Options |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= rvlt_PerformanceBasedStockOptionsMember
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0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= rvlt_PerformanceBasedStockOptionsMember
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0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= rvlt_PerformanceBasedStockOptionsMember
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| Number of options exercised |
0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= rvlt_PerformanceBasedStockOptionsMember
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0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= rvlt_PerformanceBasedStockOptionsMember
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0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= rvlt_PerformanceBasedStockOptionsMember
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| Unrecognized compensation cost |
$ 0us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
/ us-gaap_AwardTypeAxis
= rvlt_PerformanceBasedStockOptionsMember
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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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| Common stock reserved for future issuance |
379,380us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThreePlanMember
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| Percentage of option price |
100.00%rvlt_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantOptionsPrice
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThreePlanMember
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| Common stock vesting period |
3 years
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| Shares of common stock vested and exercisable |
379,380us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThreePlanMember
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| Two Thousand Three Plan | Maximum |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock option period |
10 years
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| Two Thousand Thirteen Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Common stock, issued |
1,015,501us-gaap_CommonStockSharesIssued
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
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3,000,000us-gaap_CommonStockSharesIssued
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
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| Common shares approved but unissued |
291,000us-gaap_CommonStockSharesSubscribedButUnissued
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
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| Two Thousand Thirteen Plan [Member] | Stock Option Shares [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted |
35,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
/ rvlt_CommonEquityOfferingProgramAxis
= rvlt_StockOptionSharesMember
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| Two Thousand Thirteen Plan [Member] | Restricted Shares [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Commons stock share awarded, restricted |
1,949,499us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
/ rvlt_CommonEquityOfferingProgramAxis
= rvlt_RestrictedSharesMember
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| Two Thousand Thirteen Plan [Member] | Maximum |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Grant Expiration Date |
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0rvlt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAvailableForGrantExpirationsInPeriod
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
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| Two Thousand Thirteen Plan [Member] | 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 |
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100.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_AwardTypeAxis
= rvlt_TwoThousandThirteenPlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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| Employee Restricted Stock Plan |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Weighted average term |
3 years
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| Restricted Stock |
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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 |
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300,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
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| Common stock vesting period |
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3 years
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| Common stock reserved for future issuance |
848,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
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| Restricted shares forfeited under stock incentive plan |
130,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
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| Weighted average grant date fair value |
$ 3.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
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