Note 7 - Fair Value Measurement (Details Textual) - USD ($)	6 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Minimum [Member]
Federal Funds Maturity	1 day
Maximum [Member]
Federal Funds Maturity	3 days
Liabilities, Fair Value Disclosure, Nonrecurring	$ 0	$ 0

Period of time between issuance and maturity of federal funds, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	hmta_FederalFundsMaturity
Namespace Prefix:	hmta_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration