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Note 9 - Federal Home Loan Bank Borrowings (Details) - Federal Home Loan Bank of Atlanta Borrowings (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Federal Home Loan Bank borrowings $ 20,356us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure $ 22,560us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure
Federal Home Loan Bank of Atlanta [Member] | Advance Date: September 7, 2007 [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Maturity date Sep. 07, 2017  
Current rate 3.69%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateSeptember72007Member		  
Federal Home Loan Bank borrowings 4,000us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateSeptember72007Member		 4,000us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateSeptember72007Member
Federal Home Loan Bank of Atlanta [Member] | Advance Date: July 27, 2011 [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Maturity date Jul. 28, 2014  
Current rate 2.19%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateJuly272011Member		  
Federal Home Loan Bank borrowings   3,000us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateJuly272011Member
Federal Home Loan Bank of Atlanta [Member] | Advance Date: April 13, 2012 [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Maturity date Apr. 13, 2016  
Current rate 1.265%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateApril132012Member		  
Federal Home Loan Bank borrowings 12,000us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateApril132012Member		 12,000us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateApril132012Member
Federal Home Loan Bank of Atlanta [Member] | Advance Date: December 11, 2013 [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Maturity date Dec. 11, 2014  
Current rate 0.355%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateDecember112013Member		  
Federal Home Loan Bank borrowings   3,000us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateDecember112013Member
Federal Home Loan Bank of Atlanta [Member] | Advance Date: June 17, 2014 A [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Maturity date Jun. 17, 2015  
Current rate 0.26%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateJune172014AMember		  
Federal Home Loan Bank borrowings 2,000us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateJune172014AMember		  
Federal Home Loan Bank of Atlanta [Member] | Advance Date: June 17, 2014 B [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Maturity date Jun. 17, 2016  
Current rate 0.67%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateJune172014BMember		  
Federal Home Loan Bank borrowings 2,000us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember
/ us-gaap_StatementScenarioAxis
= hmta_AdvanceDateJune172014BMember		  
Federal Home Loan Bank of Atlanta [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Federal Home Loan Bank borrowings $ 20,000us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember		 $ 22,000us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankOfAtlantaMember