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v3.23.1

Cash, Cash Equivalents and Marketable Securities - Additional Information (Detail) | 3 Months Ended | 12 Months Ended
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Mar. 31, 2023 | Dec. 31, 2022
Cash and Cash Equivalents [Line Items] |  |
Weighted average maturity period of available-for-sale securities | 5 months | 4 months

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- Definition Weighted average maturity period of available for sale securities. + References No definition available. + Details
Name: | srpt_WeightedAverageMaturityPeriodOfAvailableForSaleSecurities
Namespace Prefix: | srpt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration