Note 2 - Acquisition of Peoples Bancorp, Inc. of Bullitt County (Details Textual) - USD ($)			1 Months Ended	12 Months Ended
	Dec. 04, 2015	Nov. 27, 2015	Dec. 31, 2015	Dec. 31, 2015	Jun. 04, 2015
Duration to Calculate Per Share Price		20 days
Business Combination, Acquisition Related Costs				$ 1,002,000
Peoples Bancorp, Inc [Member]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition, Equity Interest Issuable, Per Share Owned	377.637				382.83
Business Acquisition, Share Price	$ 9,607.08				$ 9,475
Common Stock Consideration Percent					50.00%
Cash Consideration Percent					50.00%
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
Shares Issued, Price Per Share	$ 25.44
Business Combination, Acquisition Related Costs				1,000,000
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			$ 1,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 1,418,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years 244 days
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			$ 291,000
Business Combination, Pro Forma Information, Expense of Acquiree since Acquisition Date, Actual			$ 94,000
Peoples Bancorp, Inc [Member] | Foreclosed Real Estate [Member]
Business Combination, Contingent Consideration, Asset	$ 3,750,000