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2. Investment Securities (Details Narrative) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Book value of available for sale securities $ 32,958,173CMTV_BookValueOfAvailableForSaleSecurities $ 33,275,039CMTV_BookValueOfAvailableForSaleSecurities
Fair value of available for sale securities 32,946,894CMTV_FairValueOfAvailableForSaleSecurities 33,235,708CMTV_FairValueOfAvailableForSaleSecurities
Proceeds from sales of securities 10,978,026us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt 9,095,380us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt
Gains from sales of securities 39,144us-gaap_AvailableForSaleSecuritiesGrossRealizedGains 2,566us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Loss from sales of securities 11,306us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses 8,087us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Investment in FHLBB stock $ 2,744,300us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure $ 3,044,700us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure
U.S. GSE debt securities    
Number of securities   12CMTV_NumberOfSecurities
/ us-gaap_DebtSecurityAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
U.S. GSE debt securities    
Number of securities 10CMTV_NumberOfSecurities
/ us-gaap_InformationByCategoryOfDebtSecurityAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
1CMTV_NumberOfSecurities
/ us-gaap_InformationByCategoryOfDebtSecurityAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Agency mortgage-backed securities (Agency MBS)    
Number of securities 4CMTV_NumberOfSecurities
/ us-gaap_InformationByCategoryOfDebtSecurityAxis
= us-gaap_MortgageBackedSecuritiesMember