Note 2 - Acquisition of Peoples Bancorp, Inc. of Bullitt County (Details Textual) - Peoples Bancorp, Inc [Member] - USD ($)		3 Months Ended
	Dec. 04, 2015	Mar. 31, 2016	Mar. 31, 2015
Foreclosed Real Estate [Member]
Business Combination, Contingent Consideration, Asset	$ 3,750,000
Payments to Acquire Businesses, Gross	$ 14,700,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	580,017
Equity Issued in Business Combination, Fair Value Disclosure	$ 14,800,000
Sale of Contingent Assets Time Frame	2 years
Contract to Sell Contingent Assets Time Frame	60 days
Business Combination, Contingent Consideration, Percent of Excess Sales Proceeds	50.00%
Goodwill, Acquired During Period	$ 1,100,000
Business Combination, Acquisition Related Costs		$ 0	$ 53,000