Note 7 - Goodwill and Core Deposit Intangibles (Details Textual) - USD ($)	Dec. 31, 2019	May 01, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2013	Dec. 31, 1996
Goodwill, Ending Balance	$ 12,513,000		$ 682,000	$ 682,000
King Bancorp Inc. [Member]
Goodwill, Ending Balance	$ 12,000,000	$ 11,831,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		1,519,000
King Bancorp Inc. [Member] | Core Deposits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 1,500,000
Indiana Bank [Member] | Commercial Banking [Member]
Goodwill, Ending Balance						$ 682,000
THE BANCorp [Member] | Core Deposits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles					$ 2,500,000