Note 16 - Business Segments - Profit and Assets for the Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Interest income - external customers	$ 8,401	$ 7,949	$ 24,384	$ 23,676
Non-interest income - external customers	3,051	4,527	11,048	10,590
Intersegment interest income	0	0	0	0
Intersegment non-interest income	0	0	0	0
Interest expense	360	656	1,223	2,293
Provision for loan losses	(886)	770	(2,353)	1,548
Non-interest expense	6,906	6,727	20,365	20,379
Income tax expense	1,453	1,222	4,632	2,869
Net income	3,619	3,101	11,565	7,177
Total assets	1,036,615	898,452	1,036,615	898,452	$ 909,580
Consolidation, Eliminations [Member]
Interest income - external customers	0	0	0	0
Non-interest income - external customers	0	0	0	0
Intersegment interest income	(3,832)	(3,309)	(22)	(7,784)
Intersegment non-interest income	(8)	(9)	(12,230)	(32)
Interest expense	(8)	(9)	(22)	(32)
Provision for loan losses	0	0	0	0
Non-interest expense	(59)	(58)	(176)	(175)
Income tax expense	0	0	0	0
Net income	(3,773)	(3,251)	(12,054)	(7,609)
Total assets	(109,402)	(100,550)	(109,402)	(100,550)
Home Federal Savings Bank [Member] | Operating Segments [Member]
Interest income - external customers	8,401	7,949	24,384	23,676
Non-interest income - external customers	3,051	4,527	11,047	10,590
Intersegment interest income	59	58	0	175
Intersegment non-interest income	0	0	176	0
Interest expense	368	665	1,245	2,325
Provision for loan losses	(886)	770	(2,353)	1,548
Non-interest expense	6,766	6,591	19,906	19,992
Income tax expense	1,490	1,257	4,755	2,967
Net income	3,773	3,251	12,054	7,609
Total assets	1,035,945	897,694	1,035,945	897,694
Other Segments [Member] | Operating Segments [Member]
Interest income - external customers	0	0	0	0
Non-interest income - external customers	0	0	1	0
Intersegment interest income	3,773	3,251	22	7,609
Intersegment non-interest income	8	9	12,054	32
Interest expense	0	0	0	0
Provision for loan losses	0	0	0	0
Non-interest expense	199	194	635	562
Income tax expense	(37)	(35)	(123)	(98)
Net income	3,619	3,101	11,565	7,177
Total assets	$ 110,072	$ 101,308	$ 110,072	$ 101,308