Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

Income Taxes - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Income Tax Disclosure [Abstract]    
Provision for income taxes $ 204,000us-gaap_IncomeTaxExpenseBenefit $ 108,000us-gaap_IncomeTaxExpenseBenefit
Unrecognized tax benefits 100,000us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease  
Period of change of unrecognized tax benefits 12 months  
Accrued interest on accrued penalties associated with uncertain tax positions 50,000mxl_UnrecognizedAccruedInterestOnUnrecognizedTaxBenefitIncomeTaxPenalties  
Accrued penalties associated with uncertain tax position $ 20,000mxl_UnrecognizedTaxBenefitsIncomeTaxesAndPenaltiesAccrued