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Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives of The Company's Land Use Rights (Detail) | Jun. 30, 2024
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Use Rights [Member] |
Schedule Of Estimated Useful Lives Of Finite Lived Intangible Assets [Line Items] |
Land use right | 50 years

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- Definition Schedule of estimated useful lives of finite lived intangible assets. + References No definition available. + Details
Name: | ncl_ScheduleOfEstimatedUsefulLivesOfFiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | ncl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- 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: | instant

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