XML 62 R51.htm IDEA: XBRL DOCUMENT
v3.21.2

Summary of Significant Accounting Policies - Additional Information (Detail) shares in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 02, 2021 shares | Sep. 26, 2020 shares | Oct. 02, 2021 segment shares | Sep. 26, 2020 shares
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of Sources of Product Revenue | segment |  |  | 4 |
Options to purchase of shares of common stock | 100 | 100 | 200 | 300
Patents |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  | 10 years |
Trademarks |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  | 17 years |
Demonstration units |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 3 years |
Restricted Stock Units (RSUs) |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  |  | 89 |
Restricted Stock Units (RSUs) | Chief Executive Officer |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  |  | 2,700 | 2,700
Minimum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Warranty period for defects in material and workmanship |  |  | 6 months |
Minimum | Building and building improvements |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 7 years |
Minimum | Computer equipment and software |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 2 years |
Minimum | Furniture and office equipment |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 2 years |
Minimum | Machinery, equipment and tooling |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 3 years |
Minimum | Transportation, vehicles and other |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 4 years |
Maximum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Warranty period for defects in material and workmanship |  |  | 48 months |
Maximum | Building and building improvements |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 39 years |
Maximum | Computer equipment and software |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 12 years |
Maximum | Furniture and office equipment |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 6 years |
Maximum | Machinery, equipment and tooling |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 10 years |
Maximum | Transportation, vehicles and other |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 20 years |

X
- Definition Number of Sources of Product Revenue + References No definition available. + Details
Name: | masi_NumberofSourcesofProductRevenue
Namespace Prefix: | masi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary Of Significant Accounting Policies [Line Items] + References No definition available. + Details
Name: | masi_SummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix: | masi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Warranty period for defects in material and workmanship. + References No definition available. + Details
Name: | masi_WarrantyPeriodForDefectsInMaterialAndWorkmanship
Namespace Prefix: | masi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_PatentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TrademarksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=masi_DemonstrationUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=srt_ChiefExecutiveOfficerMember
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: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandBuildingsAndImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=masi_FurnitureandOfficeEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_TransportationEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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