Note 3 - Loans and Allowance for Loan Losses - Troubled Debt Restructurings by Modification Type (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Post-modification outstanding recorded balance	$ 5,741,189	$ 7,934,375
Interest Rate [Member]
Post-modification outstanding recorded balance	0	0
Term [Member]
Post-modification outstanding recorded balance	165,831	310,500
Combination [Member]
Post-modification outstanding recorded balance	5,575,358	7,623,875
Residential Portfolio Segment [Member] | One To Four Family Units [Member]
Post-modification outstanding recorded balance		1,345,358
Residential Portfolio Segment [Member] | One To Four Family Units [Member] | Interest Rate [Member]
Post-modification outstanding recorded balance	0	0
Residential Portfolio Segment [Member] | One To Four Family Units [Member] | Term [Member]
Post-modification outstanding recorded balance	0	0
Residential Portfolio Segment [Member] | One To Four Family Units [Member] | Combination [Member]
Post-modification outstanding recorded balance	0	1,345,358
Residential Portfolio Segment [Member] | Multi Family Units [Member]
Post-modification outstanding recorded balance
Residential Portfolio Segment [Member] | Multi Family Units [Member] | Interest Rate [Member]
Post-modification outstanding recorded balance	0	0
Residential Portfolio Segment [Member] | Multi Family Units [Member] | Term [Member]
Post-modification outstanding recorded balance	0	0
Residential Portfolio Segment [Member] | Multi Family Units [Member] | Combination [Member]
Post-modification outstanding recorded balance	0	0
Residential Portfolio Segment [Member] | Construction Loans [Member]
Post-modification outstanding recorded balance		5,655,969
Residential Portfolio Segment [Member] | Construction Loans [Member] | Interest Rate [Member]
Post-modification outstanding recorded balance	0	0
Residential Portfolio Segment [Member] | Construction Loans [Member] | Term [Member]
Post-modification outstanding recorded balance	0	0
Residential Portfolio Segment [Member] | Construction Loans [Member] | Combination [Member]
Post-modification outstanding recorded balance	0	5,655,969
Commercial Real Estate Portfolio Segment [Member]
Post-modification outstanding recorded balance	5,575,358	161,491
Commercial Real Estate Portfolio Segment [Member] | Interest Rate [Member]
Post-modification outstanding recorded balance	0	0
Commercial Real Estate Portfolio Segment [Member] | Term [Member]
Post-modification outstanding recorded balance	0	0
Commercial Real Estate Portfolio Segment [Member] | Combination [Member]
Post-modification outstanding recorded balance	5,575,358	161,491
Commercial Portfolio Segment [Member]
Post-modification outstanding recorded balance	165,831	771,557
Commercial Portfolio Segment [Member] | Interest Rate [Member]
Post-modification outstanding recorded balance	0	0
Commercial Portfolio Segment [Member] | Term [Member]
Post-modification outstanding recorded balance	165,831	310,500
Commercial Portfolio Segment [Member] | Combination [Member]
Post-modification outstanding recorded balance	0	461,057
Consumer Portfolio Segment [Member] | Other Loans [Member]
Post-modification outstanding recorded balance
Consumer Portfolio Segment [Member] | Other Loans [Member] | Interest Rate [Member]
Post-modification outstanding recorded balance	0	0
Consumer Portfolio Segment [Member] | Other Loans [Member] | Term [Member]
Post-modification outstanding recorded balance	0	0
Consumer Portfolio Segment [Member] | Other Loans [Member] | Combination [Member]
Post-modification outstanding recorded balance	$ 0	$ 0