Note 5 - Earnings Per Share - Earnings Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Management Recognition Plan [Member]
Dilutive potential common shares:
Dilutive weighted average shares outstanding (in shares)	890	2,409	913	2,373
Recognition and Retention Plan [Member]
Dilutive potential common shares:
Dilutive weighted average shares outstanding (in shares)	21,017	9,413	14,963	11,112
Net income (loss) available to common stockholders	$ 421,262	$ 456,982	$ 1,053,484	$ 523,669
Weighted average shares outstanding (in shares)	2,894,123	2,894,123	2,894,123	2,894,123
Weighted average unallocated ESOP shares (in shares)	(17,374)	(22,461)	(18,638)	(23,720)
Weighted average unvested MRP shares (in shares)	(1,047)	(2,795)	(1,047)	(2,795)
Basic weighted average shares outstanding (in shares)	2,875,702	2,868,867	2,874,438	2,867,608
Dilutive weighted average shares outstanding (in shares)	2,897,609	2,880,689	2,890,314	2,881,093
Basic earnings (loss) per share (in dollars per share)	$ 0.15	$ 0.16	$ 0.37	$ 0.18
Diluted earnings (loss) per share (in dollars per share)	$ 0.15	$ 0.16	$ 0.36	$ 0.18