Note 16 - Business Segments - Profit and Assets for the Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Interest income - external customers	$ 7,158	$ 6,660
Total non-interest income	1,776	1,881
Intersegment non-interest income	0
Interest expense	470	407
Non-interest expense	6,554	6,347
Income tax expense	590	841
Net income	1,445	1,216
Total assets	722,339	680,981	$ 722,685
Intersegment non-interest income		0
Consolidation, Eliminations [Member]
Interest income - external customers	0	0
Total non-interest income	0	0
Intersegment non-interest income	(1,647)
Interest expense	0	0
Non-interest expense	(53)	(53)
Income tax expense	0	0
Net income	(1,594)	(1,418)
Total assets	(83,128)	(82,789)
Intersegment non-interest income		(1,471)
Home Federal Savings Bank [Member] | Operating Segments [Member]
Interest income - external customers	7,158	6,660
Total non-interest income	1,776	1,881
Intersegment non-interest income	53
Interest expense	470	294
Non-interest expense	6,425	6,213
Income tax expense	623	939
Net income	1,594	1,418
Total assets	722,158	680,190
Intersegment non-interest income		53
Other Segments [Member] | Operating Segments [Member]
Interest income - external customers	0	0
Total non-interest income	0	0
Intersegment non-interest income	1,594
Interest expense	0	113
Non-interest expense	182	187
Income tax expense	(33)	(98)
Net income	1,445	1,216
Total assets	$ 83,309	83,580
Intersegment non-interest income		$ 1,418