Note 16 - Business Segments - Profit and Assets for the Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Interest income - external customers	$ 7,970	$ 7,255	$ 22,584	$ 20,913
Total non-interest income	1,936	1,909	5,766	5,695
Intersegment non-interest income	0	0	0	0
Interest expense	587	493	1,583	1,362
Non-interest expense	6,214	6,259	19,081	19,045
Income tax expense	1,045	1,213	2,284	2,766
Net income	2,712	1,780	5,884	4,017
Total assets	737,445	716,610	737,445	716,610	$ 722,685
Intersegment non-interest income	0	0	0	0
Consolidation, Eliminations [Member]
Interest income - external customers	0	0	0	0
Total non-interest income	0	0	0	0
Intersegment non-interest income	(2,923)	(2,013)	(6,492)	(4,754)
Interest expense	0	0	0	0
Non-interest expense	(59)	(53)	(164)	(158)
Income tax expense	0	0	0	0
Net income	(2,864)	(1,960)	(6,328)	(4,596)
Total assets	(79,072)	(78,733)	(79,072)	(78,733)
Intersegment non-interest income	(2,923)	(2,013)	(6,492)	(4,754)
Home Federal Savings Bank [Member] | Operating Segments [Member]
Interest income - external customers	7,970	7,255	22,584	20,913
Total non-interest income	1,936	1,909	5,766	5,695
Intersegment non-interest income	59	53	164	158
Interest expense	587	416	1,583	1,056
Non-interest expense	6,087	6,124	18,703	18,653
Income tax expense	1,079	1,298	2,382	3,043
Net income	2,864	1,960	6,328	4,596
Total assets	737,289	715,827	737,289	715,827
Intersegment non-interest income	59	53	164	158
Other Segments [Member] | Operating Segments [Member]
Interest income - external customers	0	0	0	0
Total non-interest income	0	0	0	0
Intersegment non-interest income	2,864	1,960	6,328	4,596
Interest expense	0	77	0	306
Non-interest expense	186	188	542	550
Income tax expense	(34)	(85)	(98)	(277)
Net income	2,712	1,780	5,884	4,017
Total assets	79,228	79,516	79,228	79,516
Intersegment non-interest income	$ 2,864	$ 1,960	$ 6,328	$ 4,596