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Note 2 - Summary of Significant Accounting Policies (Details) - Schedule of Estimated Useful Lives of Property and Equipment	9 Months Ended
	Sep. 30, 2019
Minimum [Member] | Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment	5 years
Minimum [Member] | Museum Decoration and Renovation [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment	5 years
Maximum [Member] | Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment	10 years
Maximum [Member] | Museum Decoration and Renovation [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment	10 years

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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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X

- Details

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Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=nvfy_MuseumDecorationAndRenovationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
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Period Type: