Note 18 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Letters of Credit Issued and Available Amount	$ 6.9	$ 11.4

The letters of credit issued and available amount.

No definition available.

Name:	hmnf_LettersOfCreditIssuedAndAvailableAmount
Namespace Prefix:	hmnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant