Commitments and contingencies.

No definition available.

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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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Namespace Prefix:	svra_
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- Definition

Lease agreement date.

+ References

No definition available.

+ Details

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Namespace Prefix:	svra_
Data Type:	xbrli:dateItemType
Balance Type:	na
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- Definition

Lease originally commencement date.

+ References

No definition available.

+ Details

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- Definition

Maximum amount of earnings in milestone payment.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Maximum royalty receivable.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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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

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Namespace Prefix:	svra_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Royalty agreement derivative liability.

+ References

No definition available.

+ Details

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

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

- 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
-Subparagraph (SX 210.9-03(15))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

+ Details

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

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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- Details

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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands					3 Months Ended
	Mar. 10, 2026	Oct. 29, 2025	Feb. 28, 2023	Mar. 05, 2021	Mar. 31, 2026	Jun. 30, 2024	Dec. 31, 2025
Commitments And Contingencies [Line Items]
Estimated service fees, pass through expenses, and investigator fees				$ 51,300
Maximum earnings in milestone payment						$ 5,600
Royalty agreement derivative liability					$ 374		$ 362
PARI [Member]
Commitments And Contingencies [Line Items]
Royalty percent on net sale					3.50%
Lease Amendment [Member]
Commitments And Contingencies [Line Items]
Lease agreement date			Jul. 07, 2021
Lease originally commencement date	Jul. 01, 2026		Oct. 01, 2021
Lease expiration date	Nov. 30, 2031		Jun. 30, 2026
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					$ 46,300