Revenue - Additional Information (Detail) $ in Millions	9 Months Ended
Sep. 30, 2025 USD ($)
Revenue from Contract with Customer [Abstract]
Non cash charge related to write down of customer receivables	$ 3.1

Non cash charge related to write down of customer receivables.

No definition available.

Name:	ssup_NonCashChargeRelatedToWriteDownOfCustomerReceivables
Namespace Prefix:	ssup_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration