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Subsequent Events - Additional Information (Details) - Third Amended and Restated Credit Agreement - USD ($) | Oct. 05, 2021 | Oct. 04, 2021 | Dec. 31, 2019
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Subsequent Event [Line Items] |  |  |
Maximum borrowing capacity |  |  | $ 450,000,000.0
Revolving Credit Facility |  |  |
Subsequent Event [Line Items] |  |  |
Maximum borrowing capacity |  |  | 350,000,000.0
Line of credit facility accordion potential feature |  |  | $ 200,000,000.0
Revolving Credit Facility | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Maximum borrowing capacity |  | $ 495,000,000.0 |
Fourth Amendment Revolving Credit Facility | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Increased in line of credit facility | $ 200,000,000.0 |  |
Maximum borrowing capacity | 695,000,000.0 |  |
Line of credit facility accordion potential feature | $ 200,000,000.0 |  |

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- Definition Increase in line of credit facility. + References No definition available. + Details
Name: | novt_IncreasedInLineOfCreditFacility
Namespace Prefix: | novt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line of credit facility accordion feature. + References No definition available. + Details
Name: | novt_LineOfCreditFacilityAccordionFeature
Namespace Prefix: | novt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |