COMMITMENTS AND CONTINGENCIES. (Details) (USD $)	12 Months Ended
Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Lease Commitments and Related Party Transactions
Related party rent expense			$ 658,000
Rent expense under all operating leases	159,010us-gaap_LeaseAndRentalExpense	96,066us-gaap_LeaseAndRentalExpense	733,340us-gaap_LeaseAndRentalExpense
2015	97,484
2016	9,834
Aggregated future minimum rental payments under noncancelable operating leases	107,318
Consigned Inventories
Consigned inventories to the Company	25,200,000sts_InventoryOnConsignmentToEntity	19,200,000sts_InventoryOnConsignmentToEntity
Period within which chassis are converted and delivered to customers	90 days
Repurchase Commitments
Maximum potential repurchase liability	1,800,000	1,800,000
Self Insurance
Portion of general liability for which the entity is self-insured, per occurrence	100,000	100,000
Self insurance for employee health benefits, annual coverage per employee	200,000
Worker's compensation liability for which the entity is self insured, per occurrence	$ 250,000

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Represents the maximum period from the receipt of the product from the manufacturer which inventory on consignment to the reporting entity is converted and delivered to the customer.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
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- Definition

Represents the amount of inventory on consignment to the reporting entity from the manufacturer.

+ References

No definition available.

+ Details

Name:	sts_InventoryOnConsignmentToEntity
Namespace Prefix:	sts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	sts_LeaseCommitmentsAndRelatedPartyTransactionsAbstract
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- Definition

Represents related party rental expense for the reporting period incurred under leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

No definition available.

+ Details

Name:	sts_RelatedPartyTransactionLeasesRentExpense
Namespace Prefix:	sts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Details

Name:	sts_RepurchaseCommitmentsAbstract
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- Definition

Represents the maximum potential repurchase liability without reduction for the resale value of repurchased units under repurchase agreements.

+ References

No definition available.

+ Details

Name:	sts_RepurchaseCommitmentsMaximumPotentialRepurchaseLiability
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Data Type:	xbrli:monetaryItemType
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- Details

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- Definition

Represents the annual amount per employee of employee health benefit claims for which the entity is self-insured.

+ References

No definition available.

+ Details

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Namespace Prefix:	sts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Represents the amount per occurrence of general liability claims for which the entity is self-insured.

+ References

No definition available.

+ Details

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Namespace Prefix:	sts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Represents the amount per occurrence of worker's compensation claims for which the entity is self-insured.

+ References

No definition available.

+ Details

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Namespace Prefix:	sts_
Data Type:	xbrli:monetaryItemType
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- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717

+ Details

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- Definition

Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

+ Details

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- Definition

Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

+ Details

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