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Variable Interest Entity (VIE) - Additional Information (Detail) | Jan. 02, 2007 company
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Variable Interest Entity [Abstract] |
Number of Companies with Rights to Intellectual Property | 2

X
- Definition Number of Companies with Rights to Intellectual Property + References No definition available. + Details
Name: | masi_NumberofCompanieswithRightstoIntellectualProperty
Namespace Prefix: | masi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Variable Interest Entity [Abstract] + References No definition available. + Details
Name: | masi_VariableInterestEntityAbstract
Namespace Prefix: | masi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration