Commitments and contingencies.

No definition available.

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- Definition

Contingent milestone payments.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Estimated parexel service fees and pass through expenses and investigator fees.

+ References

No definition available.

+ Details

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- Definition

Lease commencement date.

+ References

No definition available.

+ Details

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- Definition

Lease effective date.

+ References

No definition available.

+ Details

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- Definition

Lease payment increase rate.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Maximum amount of earnings in milestone payment.

+ References

No definition available.

+ Details

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- Definition

Maximum royalty receivable.

+ References

No definition available.

+ Details

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- Definition

Percentage of cancellation fees payable for future services.

+ References

No definition available.

+ Details

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- Definition

Purchase price receivable.

+ References

No definition available.

+ Details

Name:	svra_PurchasePriceReceivable
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- Definition

Royalty agreement derivative liability.

+ References

No definition available.

+ Details

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- Definition

Royalty percent for a calendar year if prior year net sales do not acheive speceified level.

+ References

No definition available.

+ Details

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- Definition

Royalty percent on net sale.

+ References

No definition available.

+ Details

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- Definition

Area of land held.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

The total amount of long-term liability charges that are being deferred beyond one year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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-Publisher FASB
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- Definition

Date which lease or group of leases is set to expire, in YYYY-MM-DD format.

+ References

No definition available.

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
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- Definition

Term of lessee's operating lease, 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
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

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Balance Type:	na
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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

+ Details

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Balance Type:	credit
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- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

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Balance Type:	debit
Period Type:	instant

- Definition

Cash payments to lessor's for use of assets under operating leases.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 25
-Subparagraph (g)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-25

+ Details

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

- Definition

Carrying amount as of the balance sheet date of improvements having a life longer than one year that were made for the benefit of one or more tenants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(d))
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

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Commitments and Contingencies - Additional Information (Detail) $ in Thousands			1 Months Ended	3 Months Ended	6 Months Ended
	Oct. 29, 2025 USD ($)	Mar. 05, 2021 USD ($)	Mar. 31, 2026 USD ($) ft²	Jun. 30, 2024 USD ($)	Jun. 30, 2026 USD ($)	May 01, 2026 USD ($)	Dec. 31, 2025 USD ($)
Commitments And Contingencies [Line Items]
Operating lease liability					$ 1,094
Estimated service fees, pass through expenses, and investigator fees		$ 51,300
Maximum earnings in milestone payment				$ 5,400
Royalty agreement derivative liability					385		$ 362
PARI [Member]
Commitments And Contingencies [Line Items]
Contingent milestone payments					$ 600
Royalty percent on net sale					3.50%
Lease Amendment [Member]
Commitments And Contingencies [Line Items]
Lease expiration date					Jun. 30, 2026
Yardley Lease [Member]
Commitments And Contingencies [Line Items]
Area of land \| ft²			10,795
Contractual lease term			65 months
Lease effective date			Jul. 01, 2026
Tenant allowance						$ 300
Lease commencement date			May 01, 2026
Lease expiration date			Nov. 30, 2031
Annual rental payments			$ 300
Lease payment increase rate			2.00%
Operating lease, ROU asset					$ 1,100
Operating lease liability					$ 1,100
Master Services Agreement [Member] \| Maximum [Member] \| Fuji [Member]
Commitments And Contingencies [Line Items]
Percentage of cancellation fees payable for future services					100.00%
Master Services Agreement [Member] \| Minimum [Member] \| Fuji [Member]
Commitments And Contingencies [Line Items]
Percentage of cancellation fees payable for future services					10.00%
Royalty Purchase and Sale Agreement [Member] \| RTW Investments, LP [Member]
Commitments And Contingencies [Line Items]
Purchase price receivable	$ 75,000
Royalty percent for a calendar year if prior year net sales do not acheive speceified level	9.50%
Maximum royalty receivable	$ 187,500
Royalty Purchase and Sale Agreement [Member] \| Maximum [Member] \| RTW Investments, LP [Member]
Commitments And Contingencies [Line Items]
Royalty percent on net sale	7.00%
Royalty Purchase and Sale Agreement [Member] \| Minimum [Member] \| RTW Investments, LP [Member]
Commitments And Contingencies [Line Items]
Royalty percent on net sale	1.00%
Development and Manufacturing Service Fees [Member] \| Master Services Agreement [Member] \| Fuji [Member]
Commitments And Contingencies [Line Items]
Estimated fees obligation to provide services					$ 57,100