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Transactions With Executive Officers, Directors And Principal Stockholders (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Legal Services [Member]    
Related Party Transaction [Line Items]    
Expenses from related parties $ 73us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_IncomeStatementLocationAxis
= sbbx_LegalServicesMember		 $ 128us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_IncomeStatementLocationAxis
= sbbx_LegalServicesMember
Appraisal Services [Member]    
Related Party Transaction [Line Items]    
Expenses from related parties 18us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_IncomeStatementLocationAxis
= sbbx_AppraisalServicesMember		 56us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_IncomeStatementLocationAxis
= sbbx_AppraisalServicesMember
Rent Expense [Member]    
Related Party Transaction [Line Items]    
Expenses from related parties 146us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_IncomeStatementLocationAxis
= sbbx_RentExpenseMember		 154us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_IncomeStatementLocationAxis
= sbbx_RentExpenseMember
Engineering Services [Member]    
Related Party Transaction [Line Items]    
Expenses from related parties $ 26us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_IncomeStatementLocationAxis
= sbbx_EngineeringServicesMember