Borrowing (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Apr. 04, 2023
Loan And Security Agreement [Member]
Subordinated Borrowing [Line Items]
Repayments of short term borroing	$ 1.7
Fixed interest rate on borrowings	4.25%
Short term bank loan		$ 40.0
Long term debt		20.0
Short term working capital		$ 20.0
Outstanding line of credit balance net	$ 0.7
Maximum [Member] \| Loan And Security Agreement [Member]
Subordinated Borrowing [Line Items]
Long term debt maturity date		Apr. 04, 2025
Minimum [Member] \| Loan And Security Agreement [Member]
Subordinated Borrowing [Line Items]
Long term debt maturity date		Apr. 04, 2024
Borrowing in 2020 [Member] \| Loan Agreements With Bank Of Hangzhou [Member]
Subordinated Borrowing [Line Items]
Short-term borrowings outstanding balance	5.6
Short term borrowings drawn down	12.6
Repayments of short term borroing	12.6
Borrowing in 2020 [Member] \| Loan Agreements With China Merchants Bank [Member]
Subordinated Borrowing [Line Items]
Repayments of short term borroing	$ 2.8
Fixed interest rate on borrowings	3.90%
Borrowing in 2020 [Member] \| Maximum [Member] \| Loan Agreements With Bank Of Hangzhou [Member]
Subordinated Borrowing [Line Items]
Fixed interest rate on borrowings	4.05%
Borrowing in 2020 [Member] \| Minimum [Member] \| Loan Agreements With Bank Of Hangzhou [Member]
Subordinated Borrowing [Line Items]
Fixed interest rate on borrowings	3.50%
Borrowing in 2022 [Member] \| Loan Agreements With China Merchants Bank [Member]
Subordinated Borrowing [Line Items]
Short-term borrowings outstanding balance	$ 0.0

Long-Term Borroing

No definition available.

Name:	nuvb_LongTermBorroing
Namespace Prefix:	nuvb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Short-Term Borrowings Drawn Down

+ References

No definition available.

+ Details

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Namespace Prefix:	nuvb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Short-Term Working Capital

+ References

No definition available.

+ Details

Name:	nuvb_ShortTermWorkingCapital
Namespace Prefix:	nuvb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of short-term bank loan secured by broker-dealer customer's security.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Rule 15c3-1
-Number 240
-Section 15c3-1
-Publisher SEC

+ Details

Name:	srt_BankLoans
Namespace Prefix:	srt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maturity date of long-term debt, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-15

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_RepaymentsOfShortTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1402
-Paragraph a
-Publisher SEC

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1402
-Paragraph b
-Subparagraph (1)
-Publisher SEC

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Stated interest rate of the subordinated debt.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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