Legal Proceedings (Details) - State	Mar. 03, 2015	Sep. 30, 2015
Legal Proceedings [Abstract]
Number of states seeking recovery of unclaimed property		45
Duration of sentence given to Gilbert Fiorentino based on whistleblower report	60 months
Duration of sentence given to Carl Fiorentino based on whistleblower report	80 months

Refers to the term of sentence given to Gilbert Fiorentino for mail fraud, wire fraud and money laundering charges, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	syx_DurationOfSentenceGivenToGilbertFiorentinoBasedOnWhistleblowerReport
Namespace Prefix:	syx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration