Note 8 - Goodwill and Other Intangibles (Details Textual) - USD ($)		12 Months Ended
	Dec. 04, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2003
Finite-Lived Intangible Assets, Gross			$ 1,400,000
Amortization of Intangible Assets		$ 147,000	12,000
Goodwill, Impairment Loss		$ 0	0
Peoples Bancorp, Inc [Member]
Goodwill, Acquired During Period	$ 1,100,000		$ 1,100,000
Hometown Bancshares Incorporated [Member]
Goodwill, Acquired During Period				$ 5,400,000