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Accrued expenses and other current liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Accrued Liabilities and Other Liabilities [Abstract]
Accrued license fee	$ 2,500	$ 0
Accrued payroll-related costs	1,292	1,358
Accrued clinical costs	109	528
Accrued research and development costs	588	516
Accrued general and administrative costs	291	544
Other	8	5
Total accrued expenses and other current liabilities	$ 4,788	$ 2,951

X

- Definition

Amount of accrued clinical costs current. This amount is expected to be consumed within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

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X

- Definition

Amount of current accrued general and administrative costs. This amount is expected to be consumed within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

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X

- Definition

Amount of accrued license fee, current. This amount is expected to be consumed within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

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X

- Definition

Amount of accrued research liability current. This amount is expected to be consumed within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

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Namespace Prefix:	sgmt_
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X

- References

No definition available.

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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- Definition

Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(20))
-Publisher FASB
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- Definition

Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481372/852-10-55-10

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