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Other Liabilities, Long-Term (Tables) | 12 Months Ended
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Dec. 31, 2016
Other Liabilities Disclosure [Abstract] |
Components of Other Liabilities | Other long-term liabilities consist of the following (in thousands):
| December 31, 2016 |  | January 2, 2016
Unrecognized tax benefit | $ | 13,442 |  |  | $ | 7,747 |
Deferred rent, long-term | 558 |  |  | 76 |
Deferred tax liability, long-term | 340 |  |  | 194 |
Other | 247 |  |  | 4 |
Total other liabilities, long-term | $ | 14,587 |  |  | $ | 8,021 |

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- Definition This element may be used as a single block of text to encapsulate the entire disclosure for other liabilities including data and tables. + References No definition available. + Details
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Namespace Prefix: | masi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_OtherLiabilitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration