Note 3 - Loans and Allowance for Loan Losses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Note 3 - Loans and Allowance for Loan Losses (Details) [Line Items]
Impaired Financing Receivable, Interest Income, Accrual Method	$ 4,000	$ 200,000	$ 46,000
Impaired Financing Receivable, Average Recorded Investment	8,110,000	8,665,000	17,244,000
Allowance for Loan and Lease Losses, Write-offs	$ 1,451,000	$ 2,715,000	$ 2,727,000
Weighted Average Interest Rate on Loans Receivable	4.87%	5.09%
Troubled Debt Restructurings [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) [Line Items]
Allowance for Loan and Lease Losses, Period Increase (Decrease)	$ 0	$ 239,724
Allowance for Loan and Lease Losses, Write-offs	1,233,075	303,345
Mortgage Receivable [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) [Line Items]
Servicing Asset at Amortized Cost	64,220	94,214
Commercial Loans [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) [Line Items]
Servicing Asset at Amortized Cost	$ 7,629,058	$ 4,672,175