Note 5 - Loans Receivable, Net - Loans Originated by State (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Loans receivable		$ 858,108	$ 787,887
Residential Portfolio Segment [Member]
Loans receivable		$ 264,303	$ 205,890
Percent of Total		100.00%	100.00%
Residential Portfolio Segment [Member] | Minnesota [Member]
Loans receivable		$ 233,026	$ 177,139
Percent of Total		88.20%	86.00%
Residential Portfolio Segment [Member] | WISCONSIN
Loans receivable		$ 23,880	$ 23,030
Percent of Total		9.00%	11.20%
Residential Portfolio Segment [Member] | Other States [Member]
Loans receivable	[1]	$ 7,397	$ 5,721
Percent of Total		2.80%	2.80%

[1] Amounts under four million dollars in both years are included in “Other states”.