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Equity Transactions - Proceeds of ATM offering (Details) - ATM Offering - USD ($) | 12 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Equity Transactions |  |
Gross proceeds | $ 5,499,000 | $ 3,237,000
Less: offering costs and expenses | 203,000 | 117,000
Net proceeds from issuance of common stock | $ 5,296,000 | $ 3,120,000

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- Definition Disclosure of information about sale of stock made by the entity to investor outside consolidated group by type of sale. + References No definition available. + Details
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Namespace Prefix: | nnvc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-15 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 14 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-14 + Details
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- Definition Amount of consideration received by subsidiary or equity investee in exchange for shares of stock issued or sold. Includes amount of cash received, fair value of noncash assets received, and fair value of liabilities assumed by the investor. + References No definition available. + Details
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- Details
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