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Earnings per Common Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Jan. 30, 2015
Earnings per Common Share      
Potentially dilutive common stock (in shares) 0us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment    
Net income (loss) $ 373us-gaap_NetIncomeLoss $ (882)us-gaap_NetIncomeLoss  
Average number of common shares outstanding 4,948,502cway_WeightedAverageNumberOfSharesOutstandingTotal    
Less: Average unallocated ESOP shares (378,112)us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements    
Average number of common shares outstanding used to calculate basic and fully diluted earnings per common share 4,570,390us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted    
Earnings per share - basic and diluted $ 0.08us-gaap_EarningsPerShareBasicAndDiluted    
Common stock authorized to repurchased under repurchase program (in shares)     247,499us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Common stock repurchased (in shares) 8,700us-gaap_StockRepurchasedDuringPeriodShares    
Payments for Repurchase of Common Stock $ 97us-gaap_PaymentsForRepurchaseOfCommonStock