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FAIR VALUE MEASUREMENT (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]    
Cost $ 46,106us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis  
Aggregate fair value 46,718us-gaap_AvailableForSaleSecurities  
Unrealized gains, net 612us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1  
Government and corporate debentures    
Schedule of Available-for-sale Securities [Line Items]    
Cost 45,518us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= mbly_GovernmentAndCorporateDebenturesMember		 33,228us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= mbly_GovernmentAndCorporateDebenturesMember
Aggregate fair value 46,114us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= mbly_GovernmentAndCorporateDebenturesMember		 32,895us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= mbly_GovernmentAndCorporateDebenturesMember
Unrealized gains, net 596us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= mbly_GovernmentAndCorporateDebenturesMember		  
Other (equity securities)    
Schedule of Available-for-sale Securities [Line Items]    
Cost 588us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquitySecuritiesMember		  
Aggregate fair value 604us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquitySecuritiesMember		  
Unrealized gains, net $ 16us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquitySecuritiesMember