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Note 10 - Stockholders’ Equity (Details) - Schedule of Stockholders' Equity Note, Warrants or Rights - $ / shares | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Schedule of Stockholders' Equity Note, Warrants or Rights [Abstract] |  |
Number of Warrants Outstanding |  | 858,334
Warrants Outstanding, Average Exercise Price | $ 2.71 | $ 2.71
Warrants Outstanding, Weighted Average Remaining Contractual Term in Years | 1 year 244 days | 1 year 335 days
Number of Warrants Exercisable |  | 858,334
Warrants Exercisable, Average Exercise Price | $ 2.71 | $ 2.71
Warrants Exercisable, Weighted Average Remaining Contractual Term in Years | 1 year 244 days | 1 year 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 | 858,334 |
Number of Warrants Exercisable | 858,334 |

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

X
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- 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_
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- Definition Number of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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