Annual report pursuant to Section 13 and 15(d)

Net Income (Loss) Per Share - Additional Information (Detail)

Net Income (Loss) Per Share - Additional Information (Detail)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Earnings Per Share [Abstract]      
Total number of class of stock outstanding 2mxl_NumberOfClassOfStockOutstanding    
Common stock equivalents (shares) 3.1us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 3.5us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 4.4us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount