Note 7 - Investment Securities - Securities with Gross Unrealized Losses (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
US States and Political Subdivisions Debt Securities [Member]
Less than 12 Months Fair Value		$ 169,601
Less than 12 Months Unrealized Losses		101
12 Months or More Fair Value	0	436,067
12 Months or More Unrealized Losses	0	21,353
Total Fair Value		605,668
Total Unrealized Losses		21,454
Residential Mortgage Backed Securities [Member]
Less than 12 Months Fair Value	1,837,258	10,468,746
Less than 12 Months Unrealized Losses	7,778	120,218
12 Months or More Fair Value	5,758,660	1,247,527
12 Months or More Unrealized Losses	80,026	29,708
Total Fair Value	7,595,918	11,716,273
Total Unrealized Losses	87,804	149,926
Less than 12 Months Fair Value	1,837,258	10,638,347
Less than 12 Months Unrealized Losses	7,778	120,319
12 Months or More Fair Value	5,758,660	1,683,594
12 Months or More Unrealized Losses	80,026	51,061
Total Fair Value	7,595,918	12,321,941
Total Unrealized Losses	$ 87,804	$ 171,380