Note 19 - Segments (Details Textual) - USD ($)	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	May 01, 2019	Dec. 31, 1996
Goodwill, Ending Balance	$ 12,513,000	$ 12,513,000	$ 12,513,000	$ 12,513,000
King Bancorp Inc. [Member]
Goodwill, Ending Balance					$ 11,800,000
Commercial Banking [Member] | Indiana Bank [Member]
Goodwill, Ending Balance						$ 682,000
Commercial Banking [Member] | Operating Segments [Member]
Goodwill, Ending Balance						12,500,000
Commercial Banking [Member] | Operating Segments [Member] | Indiana Bank [Member]
Goodwill, Ending Balance						$ 682,000
Commercial Banking [Member] | Operating Segments [Member] | King Bancorp Inc. [Member]
Goodwill, Ending Balance					$ 11,800,000