Annual report pursuant to Section 13 and 15(d)

Note 12 - Commitments and Contingencies (Details)

v2.4.1.9
Note 12 - Commitments and Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 28, 2014
Dec. 29, 2013
Dec. 30, 2012
Note 12 - Commitments and Contingencies (Details) [Line Items]      
Operating Leases, Rent Expense $ 2,175us-gaap_LeaseAndRentalExpense $ 2,330us-gaap_LeaseAndRentalExpense $ 1,869us-gaap_LeaseAndRentalExpense
Insurance Installments [Member]      
Note 12 - Commitments and Contingencies (Details) [Line Items]      
Purchase Obligation, Due in Next Twelve Months 231us-gaap_PurchaseObligationDueInNextTwelveMonths
/ us-gaap_ProductOrServiceAxis
= smtx_InsuranceInstallmentsMember 		254us-gaap_PurchaseObligationDueInNextTwelveMonths
/ us-gaap_ProductOrServiceAxis
= smtx_InsuranceInstallmentsMember 		300us-gaap_PurchaseObligationDueInNextTwelveMonths
/ us-gaap_ProductOrServiceAxis
= smtx_InsuranceInstallmentsMember
Open Non-cancellable Purchase Orders for Raw Materials [Member]      
Note 12 - Commitments and Contingencies (Details) [Line Items]      
Purchase Obligation, Due in Next Twelve Months $ 12,043us-gaap_PurchaseObligationDueInNextTwelveMonths
/ us-gaap_ProductOrServiceAxis
= smtx_OpenNonCancellablePurchaseOrdersForRawMaterialsMember 		$ 37,540us-gaap_PurchaseObligationDueInNextTwelveMonths
/ us-gaap_ProductOrServiceAxis
= smtx_OpenNonCancellablePurchaseOrdersForRawMaterialsMember 		$ 38,149us-gaap_PurchaseObligationDueInNextTwelveMonths
/ us-gaap_ProductOrServiceAxis
= smtx_OpenNonCancellablePurchaseOrdersForRawMaterialsMember