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Note 16 - Commitments and Contingencies (Details) - Commitments (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Unfunded commitments under lines of credit $ 55,280hmta_UnfundedCommitmentsUnderLinesOfCredit $ 41,056hmta_UnfundedCommitmentsUnderLinesOfCredit
Commitments to Extend Credit [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commitments to extend credit 21,137us-gaap_CommitmentsFairValueDisclosure
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember		 19,164us-gaap_CommitmentsFairValueDisclosure
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
Standby Letters of Credit [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Standby letters of credit $ 5,563us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember		 $ 4,040us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember