Composition of Other Balance Sheet Items - Accounts Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Allowance for expected sales discounts and allowances	$ 12.0	$ 10.7

Represents the allowance for sales discounts related to prompt-pay discounts and contractual fee for service arrangements to wholesalers and distributors.

No definition available.

Name:	supn_AllowanceForExpectedSalesDeductions
Namespace Prefix:	supn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant