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Note 10 - Commitments and Contingencies (Details Textual) $ in Thousands		12 Months Ended
	Jan. 22, 2021 shares	Dec. 31, 2021 ft² shares	Dec. 31, 2020 USD ($)	Apr. 16, 2020
Class of Warrant or Right, Issued During Period (in shares)		15,000
TLF Bio Innovation, Related Party Warrants [Member]
Class of Warrant or Right, Issued During Period (in shares)	15,000
Warrants in Connection with Microprofit Agreement [Member]
Class of Warrant or Right, Number of Securities Callable by Warrants or Rights Represented as Percentage of Company’s Outstanding Common Stock				12.00%
Riverside, Missouri [Member]
Area of Real Estate Property (Square Foot) | ft²		19,136
Sublease Agreement [Member]
Operating Lease, Gain (Loss) | $			$ 54
KBSIII Towers [Member]
Lessee, Operating Lease, Renewal Term (Year)		5 years

X

- Definition

The number of warrants or rights issued during period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of securities into which the class of warrant or right may be converted represented as percentage of company’s outstanding common stock.

+ References

No definition available.

+ Details

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X

- Definition

Represents gain (loss) for operating lease.

+ References

No definition available.

+ Details

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Namespace Prefix:	nby_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

X

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980

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X

- Details

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X

- Details

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X

- Details

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Period Type:

X

- Details

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- Details

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