Note 5 - Premises and Equipment (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Aug. 31, 2016
Operating Leases, Rent Expense	$ 334,977	$ 339,839	$ 484,868
General Contractor [Member]
Construction in Progress, Outstanding Commitment	1,800,000
General Contractor [Member] | Estimated Full Contract Price to Complete Remodel [Member]
Related Party Transaction, Amounts of Transaction	3,700,000
Due to Related Parties	$ 2,200,000
Community State Bank [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment				$ 20,684,880