Note 5 - Foreclosed Properties (Details) - Classification of Other Real Estate Owned and Expenses - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Real Estate Properties [Line Items]
Other Real Estate Owned	$ 5,237	$ 6,986	$ 8,143
Net (gain) loss on sales		(10)
Provision for unrealized losses	346	0
Operating expenses	151	224
Total Other Real Estate Owned	497	214
Residential Lots [Member]
Real Estate Properties [Line Items]
Other Real Estate Owned	2,520	3,023
Residential Development [Member]
Real Estate Properties [Line Items]
Other Real Estate Owned	423	423
Commercial Lots [Member]
Real Estate Properties [Line Items]
Other Real Estate Owned	90	1,076
Commercial Buildings [Member]
Real Estate Properties [Line Items]
Other Real Estate Owned	$ 2,204	$ 2,464

Other real estate owned related expenses in the statements of income.

No definition available.

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Namespace Prefix:	hmta_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of net gain on the sale of other real estate owned during the period. Excludes write downs.

+ References

No definition available.

+ Details

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Namespace Prefix:	hmta_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the provision for unrealized losses related other real estate.

+ References

No definition available.

+ Details

Name:	hmta_ProvisionForUnrealizedLosses
Namespace Prefix:	hmta_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of expense recognized during the period for the foreclosure on real estate assets.

+ References

No definition available.

+ Details

Name:	us-gaap_ForeclosedRealEstateExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5162-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4437-111522

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 28
-Article 12

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph c
-Subparagraph Schedule III
-Article 5

+ Details

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Balance Type:	debit
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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