Fair Value of Financial Assets and Liabilities (Additional Information) (Details)	6 Months Ended
Jun. 30, 2026 USD ($)
Fair Value of Financial Assets and Liabilities
Transfer of assets between fair value measurement levels	$ 0

It represents the amount of transfer of assets between fair value measurement levels.

No definition available.

Name:	srrk_TransferOfAssetsBetweenFairValueMeasurementLevels
Namespace Prefix:	srrk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration