Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Loans, allowance for loan losses (in Dollars)	$ 3,332	$ 3,721
Other real estate owned, valuation allowance (in Dollars)	$ 422	$ 935
Common stock, par value (in Dollars per share)	$ 5	$ 5
Common stock, authorized shares	10,000,000us-gaap_CommonStockSharesAuthorized	10,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	3,287,567us-gaap_CommonStockSharesIssued	3,270,299us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	3,287,567us-gaap_CommonStockSharesOutstanding	3,270,299us-gaap_CommonStockSharesOutstanding
Common stock, restricted shares	37,727hmta_RestrictedShares	27,846hmta_RestrictedShares
Series C Preferred Stock [Member]
Preferred stock, par value (in Dollars per share)	$ 0	$ 0
Preferred stock, authorized	20,000	20,000
Preferred stock, issued	14,000	14,000
Preferred stock, outstanding	14,000	14,000

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