Note 22 - HMN Financial, Inc. Financial Information (Parent Company Only) - Condensed Financial Statements for the Parent Company Only (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash and cash equivalents	$ 11,151	$ 36,259
Prepaid expenses and other assets	3,962	3,902
Total assets	1,107,135	1,096,202
Accrued expenses and other liabilities	4,790	6,520
Total liabilities	999,428	998,866
Common stock	91	91
Additional paid-in capital	41,235	41,013
Retained earnings	142,278	138,409
Unearned employee stock ownership plan shares	(870)	(1,063)
Total stockholders' equity	107,707	97,336	$ 110,031
Total liabilities and stockholders' equity	1,107,135	1,096,202
Interest income	30,757	32,256
Occupancy and equipment	3,626	3,812
Data processing	(2,187)	(1,948)
Professional services	(1,051)	(1,386)
Income tax expense	2,548	3,226
Net income	6,005	8,045
Deferred income tax benefit	(410)	103
Amortization of restricted stock awards	225	227
Amortization of unearned ESOP shares	193	193
Earned ESOP shares priced above original cost	207	271
Decrease in other assets	94	1,346
Decrease in other liabilities	(1,750)	(115)
Other, net	1	4
Net cash provided (used) by operating activities	13,686	31,311
Treasury stock purchased	(629)	(2,134)
Stock awards withheld for tax withholding	(64)	(70)
Dividends to stockholders	(1,306)	(1,049)
Net cash provided by financing activities	(1,808)	35,986
Increase in cash and cash equivalents	(25,108)	(57,884)
Cash and cash equivalents, beginning of year	36,259	94,143
Cash and cash equivalents, end of year	11,151	36,259
Parent Company [Member]
Cash and cash equivalents	16,287	15,250
Investment in subsidiaries	91,500	81,190
Prepaid expenses and other assets	56	1,046
Total assets	107,843	97,486
Accrued expenses and other liabilities	136	150
Total liabilities	136	150
Common stock	91	91
Additional paid-in capital	41,235	41,013
Retained earnings	142,278	138,409
Net unrealized losses on securities available for sale	(13,191)	(19,761)
Unearned employee stock ownership plan shares	(870)	(1,063)
Treasury stock, at cost, 4,670,757 and 4,647,686 shares	(61,836)	(61,353)
Total stockholders' equity	107,707	97,336
Total liabilities and stockholders' equity	107,843	97,486
Interest income	321	43
Equity income of subsidiaries	6,570	8,500
Compensation and benefits	(273)	(272)
Occupancy and equipment	(32)	(30)
Data processing	(8)	(6)
Professional services	(129)	(125)
Other	(433)	(404)
Income before income tax (expense) benefit	6,016	7,706
Income tax expense	(11)	339
Net income	6,005	8,045
Equity income of subsidiaries	(6,570)	(8,500)
Deferred income tax benefit	0	4
Amortization of restricted stock awards	225	227
Amortization of unearned ESOP shares	193	193
Earned ESOP shares priced above original cost	207	271
Decrease in other assets	990	(261)
Decrease in other liabilities	(14)	(13)
Other, net	0	(1)
Net cash provided (used) by operating activities	1,036	(35)
Treasury stock purchased	(629)	(2,134)
Stock awards withheld for tax withholding	(64)	(70)
Dividends to stockholders	(1,306)	(1,049)
Dividends received from Bank	2,000	6,000
Net cash provided by financing activities	1	2,747
Increase in cash and cash equivalents	1,037	2,712
Cash and cash equivalents, beginning of year	15,250	12,538
Cash and cash equivalents, end of year	$ 16,287	$ 15,250