Note 9 - Goodwill and Other Intangible Assets (Details Textual) $ in Thousands		1 Months Ended	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Oct. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Number of Reportable Segments	2			1
Goodwill, Impairment Loss		$ 1,490	$ 1,490	$ 1,492
Amortization of Intangible Assets, Total				$ 1,039	$ 1,056	$ 1,136
Core Deposits [Member]
Finite-Lived Intangible Assets, Remaining Amortization Period				5 years
Minimum [Member] | Core Deposits [Member]
Finite-Lived Intangible Asset, Useful Life				4 years
Maximum [Member] | Core Deposits [Member]
Finite-Lived Intangible Asset, Useful Life				7 years