XML 46 R30.htm IDEA: XBRL DOCUMENT
v3.20.2

Legal Proceedings (Details) | Sep. 30, 2020 state
--- | ---
Commitments and Contingencies Disclosure [Abstract] |
Number of states seeking recovery of unclaimed property | 28
Number of states requesting payment | 20

X
- Definition Number Of States Requesting Payments + References No definition available. + Details
Name: | syx_NumberOfStatesRequestingPayments
Namespace Prefix: | syx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of states being audited and seeking recovery of unclaimed property. + References No definition available. + Details
Name: | syx_NumberOfStatesSeekingRecoveryOfUnclaimedProperty
Namespace Prefix: | syx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration