Note 20 - Segments (Details Textual) - USD ($)	Sep. 30, 2021	Jun. 30, 2021	Jun. 01, 2021	May 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	May 01, 2019	Dec. 31, 1996
Goodwill, Ending Balance	$ 135,830,000	$ 136,529,000			$ 12,513,000	$ 12,513,000	$ 12,513,000	$ 12,513,000
King Bancorp Inc. [Member]
Goodwill, Ending Balance									$ 12,000,000
Kentucky Bancshares [Member]
Goodwill, Ending Balance	123,000,000		$ 0	$ 123,000,000
Commercial Banking [Member] | Indiana Bank [Member]
Goodwill, Ending Balance										$ 682,000
Commercial Banking [Member] | Operating Segments [Member]
Goodwill, Ending Balance	$ 136,000,000
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									$ 12,000,000
Commercial Banking [Member] | Operating Segments [Member] | Kentucky Bancshares [Member]
Goodwill, Ending Balance				$ 123,000,000