XML 99 R55.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Variable Interest Entities (VIEs) - Additional Information (Detail) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2015 USD ($) | Dec. 29, 2018 USD ($) ft² | Dec. 30, 2017 USD ($) | Dec. 31, 2016 USD ($)
Variable Interest Entity [Line Items] |  |  |  |
Patent and Licensing Fee - Aggregate | $ 2.4 |  |  |
Property Plant and Equipment, Occupied Square Feet | ft² |  | 16,830 |  |
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Minimum aggregate royalty payments |  | $ 10.9 | $ 8.0 | $ 6.4
Payment for Administrative Fees |  | 0.2 | $ 0.2 | $ 0.2
Variable Interest Entity, Primary Beneficiary [Member] | Minimum |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Minimum aggregate royalty payments |  | $ 5.0 |  |

X
- Definition The aggregate amount related to the patent and licensing fee. + References No definition available. + Details
Name: | masi_PatentandLicensingFeeAggregate
Namespace Prefix: | masi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of square feet occupied. + References No definition available. + Details
Name: | masi_PropertyPlantandEquipmentOccupiedSquareFeet
Namespace Prefix: | masi_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount paid to managing member or general partner, affiliate of managing member or general partner, or affiliate of limited liability company (LLC) or limited partnership (LP) for administrative services provided to the LLC or LP, for example, but not limited to, salaries, rent, or overhead costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3367-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_PaymentForAdministrativeFees
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of cash paid for royalties during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585 + Details
Name: | us-gaap_PaymentsForRoyalties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |