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Fair Value Measurement - Projected Annual Volatility (Details)	12 Months Ended
	Jun. 30, 2018
One Year Ended 6/30/18
Fair Value Assumption Expected Volatility Rate	56.00%

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- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

No definition available.

+ Details

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Namespace Prefix:	nnvc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	us-gaap_StatementClassOfStockAxis=nnvc_OneYearEnded63018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: