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Note 7 - Commitments and Contingencies (Details Textual) $ in Thousands | 6 Months Ended
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Jun. 30, 2025 USD ($)
Operating Lease, Impairment Loss | $ 559
Office Space for Corporate Headquarters in Emeryville, California [Member] |
Operating Lease, Impairment Loss | $ 559

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- Definition Amount of loss from impairment of right-of-use asset from operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479365/842-20-25-6 + Details
Name: | us-gaap_OperatingLeaseImpairmentLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_LeaseContractualTermAxis=nby_OfficeSpaceForCorporateHeadquartersInEmeryvilleCaliforniaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |