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Stockholders' Equity (Details) - Schedule of Stockholders' Equity Note, Warrants or Rights - $ / shares | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Schedule of Stockholders' Equity Note, Warrants or Rights [Abstract] |  |
Number of Warrants Outstanding |  | 171,667
Warrants Outstanding, Average Exercise Price | $ 13.55 | $ 13.55
Warrants Outstanding, Weighted Average Remaining Contractual Term in Years | 62 days | 335 days
Number of Warrants Exercisable |  | 171,667
Warrants Exercisable, Average Exercise Price | $ 13.55 | $ 13.55
Warrants Exercisable, Weighted Average Remaining Contractual Term in Years | 62 days | 335 days
Number of Warrants Granted | 0 |
Warrants Granted, Average Exercise Price | $ 0 |
Number of Warrants Exercised | 0 |
Warrants Exercised, Average Exercise Price | $ 0 |
Number of Warrants Expired | 0 |
Warrants Expired, Average Exercise Price | $ 0 |
Number of Warrants Outstanding | 171,667 |
Number of Warrants Exercisable | 171,667 |

X
- Definition Aggregate amount of each class of warrants or rights exercisable. + References No definition available. + Details
Name: | nvfy_ClassOfWarrantOrRightsExercisable
Namespace Prefix: | nvfy_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate amount of each class of warrants or rights exercised. + References No definition available. + Details
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Namespace Prefix: | nvfy_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate amount of each class of warrants or rights expired. + References No definition available. + Details
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Namespace Prefix: | nvfy_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of each class of warrants or rights exercisable. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

X
- Definition The weighted average exercise price of each class of warrants or rights exercised. + References No definition available. + Details
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Namespace Prefix: | nvfy_
Data Type: | num:perShareItemType
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Namespace Prefix: | nvfy_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of each class of warrants or rights granted. + References No definition available. + Details
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Namespace Prefix: | nvfy_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of each class of warrants or rights outstanding. + References No definition available. + Details
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Namespace Prefix: | nvfy_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate amount of warrants or rights granted during the period. + References No definition available. + Details
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Namespace Prefix: | nvfy_
Data Type: | xbrli:sharesItemType
Balance Type: | na
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- References No definition available. + Details
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X
- Definition Weighted average remaining contractual term for warrants exercisable. + References No definition available. + Details
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Namespace Prefix: | nvfy_
Data Type: | xbrli:durationItemType
Balance Type: | na
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X
- Definition Weighted average remaining contractual term for warrants outstanding. + References No definition available. + Details
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Namespace Prefix: | nvfy_
Data Type: | xbrli:durationItemType
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X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
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