Note 10 - Fair Value Measurements (Details) - Fair Value of Financial Instruments (USD $)	Dec. 31, 2014	Dec. 31, 2013
Financial assets
Cash and due from banks	$ 13,795,000us-gaap_CashAndDueFromBanks	$ 19,537,000us-gaap_CashAndDueFromBanks
Cash and due from banks, fair value	13,806,000hmta_CashAndDueFromBanksFairValue	19,541,000hmta_CashAndDueFromBanksFairValue
Federal funds sold	649,000us-gaap_FederalFundsSold	738,000us-gaap_FederalFundsSold
Federal funds sold, fair value	649,000us-gaap_FederalFundsSold	738,000us-gaap_FederalFundsSold
Securities available-for-sale	54,603,000us-gaap_AvailableForSaleSecurities	57,922,000us-gaap_AvailableForSaleSecurities
Restricted equity securities	2,476,000	2,564,000
Restricted equity securities, fair value	2,476,000	2,564,000
Loans held for sale	242,000us-gaap_LoansReceivableHeldForSaleNet	0us-gaap_LoansReceivableHeldForSaleNet
Loans held for sale	242,000
Loans, net	328,347,000	294,212,000
Loans, net, fair value	332,167,000	293,135,000
Bank owned life insurance	3,622,000us-gaap_BankOwnedLifeInsurance	3,518,000us-gaap_BankOwnedLifeInsurance
Bank owned life insurance, fair value	3,622,000us-gaap_BankOwnedLifeInsurance	3,518,000us-gaap_BankOwnedLifeInsurance
Accrued income	1,924,000	1,877,000
Accrued income, fair value	1,924,000	1,877,000
Financial liabilities
Total deposits	362,595,000us-gaap_Deposits	339,770,000us-gaap_Deposits
Total deposits, fair value	350,418,000us-gaap_DepositsFairValueDisclosure	327,514,000us-gaap_DepositsFairValueDisclosure
Short term borrowings	422,000us-gaap_ShortTermBorrowings	258,000us-gaap_ShortTermBorrowings
Short term borrowings, fair value	422,000us-gaap_ShorttermDebtFairValue	258,000us-gaap_ShorttermDebtFairValue
FHLB borrowings	20,000,000	22,000,000
FHLB borrowings, fair value	20,356,000	22,560,000
Accrued interest payable	272,000	286,000
Accrued interest payable, fair value	272,000	286,000
Fair Value, Inputs, Level 1 [Member]
Financial assets
Cash and due from banks, fair value	11,794,000	17,537,000
Federal funds sold	649,000	738,000
Federal funds sold, fair value	649,000	738,000
Fair Value, Inputs, Level 2 [Member]
Financial assets
Cash and due from banks, fair value	2,012,000	2,004,000
Securities available-for-sale	54,603,000	57,922,000
Restricted equity securities	2,476,000	2,564,000
Restricted equity securities, fair value	2,476,000	2,564,000
Loans held for sale	242,000
Loans held for sale	242,000
Bank owned life insurance	3,622,000	3,518,000
Bank owned life insurance, fair value	3,622,000	3,518,000
Accrued income	1,924,000	1,877,000
Accrued income, fair value	1,924,000	1,877,000
Financial liabilities
Total deposits, fair value	350,418,000	327,514,000
Short term borrowings, fair value	422,000	258,000
FHLB borrowings, fair value	20,356,000	22,560,000
Accrued interest payable, fair value	272,000	286,000
Fair Value, Inputs, Level 3 [Member]
Financial assets
Loans, net, fair value	$ 332,167,000	$ 293,135,000

Fair value portion of cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks.

No definition available.