Note 14 - Commitments and Contingencies (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Commitments	$ 18,039,244	$ 13,029,213
Variable Rate [Member]
Commitments	12,892,477	12,709,213
Fixed Rate [Member]
Commitments	5,146,767	320,000
Loan Origination Commitments [Member]
Commitments	$ 3,717,610	$ 942,500
Range of rates on fixed commitments
Loan Origination Commitments [Member] | Minimum [Member]
Range of rates on fixed commitments	3.50%	3.50%
Loan Origination Commitments [Member] | Maximum [Member]
Range of rates on fixed commitments	4.75%	3.875%
Loan Origination Commitments [Member] | Variable Rate [Member]
Commitments	$ 1,582,150	$ 640,500
Loan Origination Commitments [Member] | Fixed Rate [Member]
Commitments	2,135,460	302,000
Unfunded Commitments On Construction Loans [Member]
Commitments	$ 3,011,307	94,033
Range of rates on fixed commitments
Unfunded Commitments On Construction Loans [Member] | Minimum [Member]
Range of rates on fixed commitments	1.88%
Unfunded Commitments On Construction Loans [Member] | Maximum [Member]
Range of rates on fixed commitments	4.38%
Unfunded Commitments On Construction Loans [Member] | Variable Rate [Member]
Commitments	$ 0	94,033
Unfunded Commitments On Construction Loans [Member] | Fixed Rate [Member]
Commitments	3,011,307	0
Unfunded Commitments Under Lines Of Credit [Member]
Commitments	11,310,327	11,974,680
Unfunded Commitments Under Lines Of Credit [Member] | Variable Rate [Member]
Commitments	11,310,327	11,974,680
Unfunded Commitments Under Lines Of Credit [Member] | Fixed Rate [Member]
Commitments	0	0
Loan Commitments [Member]
Commitments	18,039,244	13,011,213
Loan Commitments [Member] | Variable Rate [Member]
Commitments	12,892,477	12,709,213
Loan Commitments [Member] | Fixed Rate [Member]
Commitments	5,146,767	302,000
Standby Letters of Credit [Member]
Commitments	0	$ 18,000
Range of rates on fixed commitments		9.00%
Standby Letters of Credit [Member] | Maximum [Member]
Range of rates on fixed commitments
Standby Letters of Credit [Member] | Variable Rate [Member]
Commitments	0	$ 0
Standby Letters of Credit [Member] | Fixed Rate [Member]
Commitments	$ 0	$ 18,000