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Summary of Significant Accounting Policies (Details Textual) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Accounting Policies [Line Items] |  |  |
Percentage Of Loan Related To Commercial Real Estate | 55.00%csbq_PercentageOfLoanRelatedToCommercialRealEstate | 54.00%csbq_PercentageOfLoanRelatedToCommercialRealEstate |
Deposits | $ 308,654,465us-gaap_Deposits | $ 341,414,377us-gaap_Deposits |
Securities Sold under Agreements to Repurchase | 19,409,506us-gaap_SecuritiesSoldUnderAgreementsToRepurchase |  |
Advertising Expense | 112,864us-gaap_AdvertisingExpense | 89,859us-gaap_AdvertisingExpense | 89,068us-gaap_AdvertisingExpense
Securities Sold under Agreements to Repurchase, Fair Value of Collateral | 24,207,000us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral |  |
Percentage Of Qualified Low Income Community Investments | 85.00%csbq_PercentageOfQualifiedLowIncomeCommunityInvestments |  |
Single Customer [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Deposits |  | $ 20,204,000us-gaap_Deposits / us-gaap_MajorCustomersAxis = csbq_SingleCustomerMember |
Concentration In Deposits Percentage |  | 6.00%csbq_ConcentrationInDepositsPercentage / us-gaap_MajorCustomersAxis = csbq_SingleCustomerMember |
Minimum [Member] | Building and Building Improvements [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |
Minimum [Member] | Furniture and Fixtures [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |
Maximum [Member] | Building and Building Improvements [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 40 years |  |
Maximum [Member] | Furniture and Fixtures [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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