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Leases - Additional Information (Details) | 3 Months Ended
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Apr. 03, 2020
Lessee Lease Description [Line Items] |
Lease renewal terms and termination description | Certain leases include terms such as an option to purchase the property, one or more options to renew, with renewal terms that can extend the lease term from one to 10 years, and options to terminate the leases within one year.
Minimum |
Lessee Lease Description [Line Items] |
Lease agreement expiration year | 2020
Lease renewal terms | 1 year
Maximum |
Lessee Lease Description [Line Items] |
Lease agreement expiration year | 2034
Lease renewal terms | 10 years
Lease termination period | 1 year
Land | Maximum |
Lessee Lease Description [Line Items] |
Lease agreement expiration year | 2078

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- Definition Lease agreements expiration year. + References No definition available. + Details
Name: | novt_LeaseAgreementsExpirationYear
Namespace Prefix: | novt_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

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- Definition Lessee operating and finance lease option to extend and terminate description. + References No definition available. + Details
Name: | novt_LesseeOperatingAndFinanceLeaseOptionToExtendAndTerminateDescription
Namespace Prefix: | novt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Lessee operating and finance lease renewal term. + References No definition available. + Details
Name: | novt_LesseeOperatingAndFinanceLeaseRenewalTerm
Namespace Prefix: | novt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Lessee operating and finance lease termination period. + References No definition available. + Details
Name: | novt_LesseeOperatingAndFinanceLeaseTerminationPeriod
Namespace Prefix: | novt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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

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

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- Details
Name: | us-gaap_MajorPropertyClassAxis=us-gaap_LandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |