Note 18 - Financial Instruments with Off-Balance Sheet Risk (Details) - Aggregrate Contractual Obligations $ in Thousands	Dec. 31, 2015 USD ($)
Contractual Obligations:
Contractual Obligation	$ 15,673
Contractual Obligation due less than 1 year	1,830
Contractual Obligation due 1 - 3 years	3,559
Contractual Obligation due 4 - 5 years	3,418
Contractual Obligation due after 5 years	6,866
Total Borrowings [Member]
Contractual Obligations:
Contractual Obligation	9,000
Contractual Obligation due less than 1 year	1,000
Contractual Obligation due 1 - 3 years	2,000
Contractual Obligation due 4 - 5 years	2,000
Contractual Obligation due after 5 years	4,000
Annual Rental Commitments Under Non-Cancellable Operating Leases [Member]
Contractual Obligations:
Contractual Obligation	6,673
Contractual Obligation due less than 1 year	830
Contractual Obligation due 1 - 3 years	1,559
Contractual Obligation due 4 - 5 years	1,418
Contractual Obligation due after 5 years	$ 2,866

No definition available.

Name:	hmnf_ContractualObligationsAbstract
Namespace Prefix:	hmnf_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

+ References

No definition available.

+ Details

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

- Definition

Amount of contractual obligation due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Amount of contractual obligation due in the fourth and fifth fiscal years following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Amount of contractual obligation due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Amount of contractual obligation due in the second and third fiscal years following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_OtherCommitmentsAxis=hmnf_TotalBorrowingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OtherCommitmentsAxis=hmnf_AnnualRentalCommitmentsUnderNonCancellableOperatingLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: