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Note 12 - Equity-based Compensation - Stock Options Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Outstanding awards (in shares)		7
Outstanding, weighted-average exercise price (in dollars per share)		$ 471.64
Outstanding, weighted-average remaining contractual life (Year)	3 years 2 months 12 days	8 years 3 months 18 days
Outstanding, aggregate intrinsic value	$ 0	$ 3
Restricted stock units vested (in shares)	(5)
Restricted stock units vested, weighted-average exercise price (in dollars per share)	$ 0
Options forfeited/cancelled (in shares)	(1)
Options forfeited/cancelled, weighted-average exercise price (in dollars per share)	$ 946.75
Outstanding awards (in shares)	1
Outstanding, weighted-average exercise price (in dollars per share)	$ 448.84
Vested and expected to vest (in shares)	1
Vested and expected to vest, weighted-average exercise price (in dollars per share)	$ 448.84
Vested and expected to vest, weighted-average remaining contractual life (Year)	3 years 2 months 12 days
Vested and expected to vest, aggregate intrinsic value	$ 0
Vested and exercisable (in shares)	1
Exercisable, weighted-average exercise price (in dollars per share)	$ 2,506.04
Exercisable, weighted-average remaining contractual life (Year)	3 years 2 months 12 days

X

- Definition

As of the balance sheet date, the weighted-average exercise price for outstanding stock options and equity instruments other than options that are fully vested or expected to vest.

+ References

No definition available.

+ Details

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X

- Definition

Weighted average remaining contractual term for fully vested and expected to vest equity instruments other than options and options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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X

- Definition

The number of shares into which fully or partially vested stock equity instruments other than options and options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

No definition available.

+ Details

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X

- Definition

Weighted average price at which option or equity instruments other than options, holders acquired shares when converting their stock options or equity instruments other than options, into shares.

+ References

No definition available.

+ Details

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X

- Definition

Weighted average remaining contractual term for equity instruments other than options and options that are exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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X

- Definition

The number of equity-based payment instruments, including stock (or unit) options, outstanding during the reporting period.

+ References

No definition available.

+ Details

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X

- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan or equity instruments other than options.

+ References

No definition available.

+ Details

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X

- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest equity instruments other than options and options outstanding.

+ References

No definition available.

+ Details

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X

- Definition

As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options and equity instruments other than options outstanding can be converted under the option plan.

+ References

No definition available.

+ Details

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X

- Definition

Weighted average per share amount of options vested in period.

+ References

No definition available.

+ Details

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Namespace Prefix:	nby_
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X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(02)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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X

- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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X

- Definition

Weighted average price of options that were either forfeited or expired.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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X

- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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X

- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Subparagraph (e)(1)
-Name Accounting Standards Codification
-Paragraph 2
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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