XML 66 R48.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Related Party Transactions (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 USD ($) ft² death | Apr. 01, 2017 USD ($) | Dec. 30, 2017 USD ($)
Related Party Transaction [Line Items] |  |  |
Property Plant and Equipment, Occupied Square Feet | ft² | 16,830 |  |
Estimate of Annual Preventable Hospital Deaths Prevented by 2020 | death | 200,000 |  |
Cercacor Laboratories [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Payments for Royalties | $ 2,500,000.0 | $ 1,600,000.0 |
Payment for Administrative Fees | 100,000 | 100,000 |
Operating Leases, Income Statement, Sublease Revenue | 100,000 | $ 100,000 |
Related Party Transaction, Due from (to) Related Party | 2,600,000 |  | $ 1,500,000
Reimbursement Fee [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Related Party Transaction, Due from (to) Related Party | 100,000 |  |
Variable Interest Entity, Not Primary Beneficiary [Member] | Minimum |  |  |
Related Party Transaction [Line Items] |  |  |
Payments for Royalties | $ 5,000,000.0 |  |

X
- Definition Estimate of Annual Preventable Hospital Deaths Prevented by 2020 + References No definition available. + Details
Name: | masi_EstimateofAnnualPreventableHospitalDeathsPreventedby2020
Namespace Prefix: | masi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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 The amount of revenue recognized for the period under subleasing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 55 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=77891322&loc=d3e41620-112719 + Details
Name: | us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
Name: | us-gaap_PaymentsForRoyalties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_RelatedPartyTransactionDueFromToRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=masi_CercacorLaboratoriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=masi_ReimbursementFeeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |