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NET INCOME PER COMMON AND COMMON EQUIVALENT SHARE (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Earnings Per Share [Abstract]    
Potentially dilutive options excluding outstanding 32,777us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 49,277us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Net Income (Numerator)    
Basic earnings available to common stockholders $ 369us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 357us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Nonvested restricted stock grant      
Effect of dilutive securities: options to purchase common shares      
Diluted earnings $ 369us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted $ 357us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted
Shares (Denominator)    
Basic (in shares) 2,194,000us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 2,161,000us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Nonvested restricted stock grant (in shares) 16czbs_IncrementalCommonSharesAttributableToNonvestedRestrictedStock 10czbs_IncrementalCommonSharesAttributableToNonvestedRestrictedStock
Effect of dilutive securities: options to purchase common shares (in shares)      
Diluted (in shares) 2,210,000us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 2,171,000us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Per Share Amount    
Basic earnings per share available to common stockholders (in dollars per share) $ 0.17us-gaap_EarningsPerShareBasic $ 0.17us-gaap_EarningsPerShareBasic
Nonvested resticted stock grant (in dollars per share)      
Effect of dilutive securities: options to purchase common shares (in dollars per shares)      
Diluted earnings per share (in dollars per share) $ 0.17us-gaap_EarningsPerShareDiluted $ 0.16us-gaap_EarningsPerShareDiluted