Note 4 - Loans Leases Receivable - Related Party Loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Balance, beginning	$ 61,608,976	$ 42,012,313	$ 42,469,111
Net increase (decrease) due to change in related parties	11,926,759	19,945,960	(3,606,418)
Advances	13,090,798	4,806,616	19,040,675
Repayments	(20,184,585)	(5,155,913)	(15,891,055)
Balance, ending	$ 66,441,948	$ 61,608,976	$ 42,012,313