Name:	hmta_Note3LoansReceivableDetailsLineItems
Namespace Prefix:	hmta_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of allowance for credit losses related to receivables which had been measured under a general allowance for credit losses methodology that are now identified as troubled debt restructurings.

+ References

No definition available.

+ Details

Name:	us-gaap_AllowanceForCreditLossesChangeInMethodOfCalculatingImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 33

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

+ Details

Name:	us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=hmta_TroubledDebtRestructuringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_NonperformingFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_PerformingFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 3 - Loans Receivable (Details) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended		0 Months Ended
Note 3 - Loans Receivable (Details) (USD $)	Dec. 31, 2013	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Note 3 - Loans Receivable (Details) [Line Items]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	$ 223,000		$ 0	$ 223,000	0
Financing Receivable, Modifications, Recorded Investment	6,300,000		6,700,000	6,300,000	6,700,000
Financing Receivable, Modifications, Number of Contracts	3	1,000,000	1	0
Financing Receivable, Recorded Investment, Nonaccrual Status	989,000		1,254,000	989,000	1,254,000
Allowance for Credit Losses, Change in Method of Calculating Impairment	0		0	0	0
Troubled Debt Restructuring [Member] \| Substandard [Member]
Note 3 - Loans Receivable (Details) [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	30,000		22,000	30,000	22,000
Troubled Debt Restructuring [Member]
Note 3 - Loans Receivable (Details) [Line Items]
Financing Receivable, Modifications, Number of Contracts					4
Performing Financing Receivable [Member]
Note 3 - Loans Receivable (Details) [Line Items]
Financing Receivable, Modifications, Recorded Investment	6,300,000		6,100,000	6,300,000	6,100,000
Financing Receivable, Modifications, Number of Contracts	2				2
Nonperforming Financing Receivable [Member]
Note 3 - Loans Receivable (Details) [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 30,000		$ 639,000	$ 30,000	639,000
Financing Receivable, Modifications, Number of Contracts					2,000