Composition of Other Balance Sheet Items - Accrued Product Returns and Rebates (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued product rebates	$ 111,695	$ 96,984
Accrued product returns	57,429	57,290
Total	$ 169,124	$ 154,274

Carrying value as of the balance sheet date of accrued product returns and rebates.

No definition available.

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