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Parent Company Activity, Summary of Condensed Statements of Income (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Income    
Gain (loss) on the sale of investment securities $ (1,670)us-gaap_GainOnSaleOfInvestments $ 9,206us-gaap_GainOnSaleOfInvestments
Dividend income 24,419us-gaap_DividendIncomeOperating 22,190us-gaap_DividendIncomeOperating
Expenses    
Income tax benefit 1,751,114us-gaap_IncomeTaxExpenseBenefit 1,759,667us-gaap_IncomeTaxExpenseBenefit
Net income 3,443,569us-gaap_NetIncomeLoss 2,889,351us-gaap_NetIncomeLoss
Net income available to common stockholders 3,260,146us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 2,705,928us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Parent Company [Member]    
Income    
Equity in undistributed income of subsidiary 2,457,219us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
1,790,589us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Dividends from subsidiary 1,020,000sryb_DividendsFromSubsidiary
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
1,122,000sryb_DividendsFromSubsidiary
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Gain (loss) on the sale of investment securities (1,670)us-gaap_GainOnSaleOfInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
9,206us-gaap_GainOnSaleOfInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Interest income 9us-gaap_InterestIncomeOperating
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
8us-gaap_InterestIncomeOperating
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Dividend income 24,419us-gaap_DividendIncomeOperating
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
22,190us-gaap_DividendIncomeOperating
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Total income 3,499,977us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
2,943,993us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Expenses    
Other expense 72,835us-gaap_OtherGeneralExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
66,614us-gaap_OtherGeneralExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Income before income taxes 3,427,142us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
2,877,379us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Income tax benefit (16,427)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(11,972)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net income 3,443,569us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
2,889,351us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Preferred stock dividends (183,423)us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(183,423)us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net income available to common stockholders $ 3,260,146us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
$ 2,705,928us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember