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FAIR VALUE MEASUREMENT (Detail Textuals) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Fair Value Disclosures [Abstract]    
Aggregate amortized cost   $ 46,106us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis
Aggregate fair value   46,718us-gaap_AvailableForSaleSecurities
Recognized other-than-temporary impairment 152us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet  
Short term deposits included in cash and cash equivalents 192,456us-gaap_ShortTermInvestments 31,935us-gaap_ShortTermInvestments
Government and corporate debentures    
Fair Value Disclosures [Abstract]    
Aggregate amortized cost 33,228us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= mbly_GovernmentAndCorporateDebenturesMember
45,518us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= mbly_GovernmentAndCorporateDebenturesMember
Aggregate fair value 32,895us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= mbly_GovernmentAndCorporateDebenturesMember
46,114us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= mbly_GovernmentAndCorporateDebenturesMember
Gross unrealized gains 68us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= mbly_GovernmentAndCorporateDebenturesMember
 
Gross unrealized losses 249us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= mbly_GovernmentAndCorporateDebenturesMember
 
Aggregate fair value of investments with unrealized losses $ 19,529us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= mbly_GovernmentAndCorporateDebenturesMember