Note 16 - Business Segments - Profit and Assets for the Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Interest income - external customers	$ 7,949	$ 7,998	$ 23,676	$ 24,029
Non-interest income - external customers	4,396	2,227	10,461	5,939
Intersegment interest income	0		0
Intersegment non-interest income	0	0	0	0
Interest expense	656	906	2,293	2,425
Provision for loan losses	770	(420)	1,548	(1,452)
Non-interest expense	6,596	6,747	20,250	19,761
Income tax expense	1,222	916	2,869	2,677
Net income	3,101	2,076	7,177	6,557
Total assets	898,452	763,228	898,452	763,228	$ 777,639
Consolidation, Eliminations [Member]
Interest income - external customers	0	(2)	0	(2)
Non-interest income - external customers	0	0	0	0
Intersegment interest income	(9)		(32)
Intersegment non-interest income	(3,309)	(2,294)	(7,784)	(7,191)
Interest expense	(9)	(2)	(32)	(2)
Provision for loan losses	0	0	0	0
Non-interest expense	(58)	(59)	(175)	(176)
Income tax expense	0	0	0	0
Net income	(3,251)	(2,235)	(7,609)	(7,015)
Total assets	(100,550)	(90,605)	(100,550)	(90,605)
Home Federal Savings Bank [Member] | Operating Segments [Member]
Interest income - external customers	7,949	7,998	23,676	24,029
Non-interest income - external customers	4,396	2,227	10,461	5,939
Intersegment interest income	0		0
Intersegment non-interest income	58	59	175	176
Interest expense	665	908	2,325	2,427
Provision for loan losses	770	(420)	1,548	(1,452)
Non-interest expense	6,460	6,604	19,863	19,363
Income tax expense	1,257	957	2,967	2,791
Net income	3,251	2,235	7,609	7,015
Total assets	897,694	762,445	897,694	762,445
Other Segments [Member] | Operating Segments [Member]
Interest income - external customers	0	2	0	2
Non-interest income - external customers	0	0	0	0
Intersegment interest income	9		32
Intersegment non-interest income	3,251	2,235	7,609	7,015
Interest expense	0	0	0	0
Provision for loan losses	0	0	0	0
Non-interest expense	194	202	562	574
Income tax expense	(35)	(41)	(98)	(114)
Net income	3,101	2,076	7,177	6,557
Total assets	$ 101,308	$ 91,388	$ 101,308	$ 91,388