Gain from Sale of Priority Review Voucher - Additional Information (Detail) $ in Millions	1 Months Ended
Apr. 30, 2021 USD ($)
F D A
Gain From Sale Of Intangible Asset [Line Items]
Proceeds from sale of rare pediatric disease priority review voucher, Net of commission	$ 102.0

Proceeds from sale of rare pediatric disease priority review voucher, Net of commission.

No definition available.

Name:	srpt_ProceedsFromSaleOfRarePediatricDiseasePriorityReviewVoucherNetOfCommission
Namespace Prefix:	srpt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration