Note 10 - Proposed Acquisition of Liberty Bancshares (Details Textual) - $ / shares	Sep. 30, 2022	May 26, 2022	Dec. 31, 2021
Common Stock, No Par Value (in dollars per share)	$ 0		$ 0
Merger Agreement, Liberty Bancshares, Inc. (“Liberty”) Will Merge with and into Merger Sub (the “Merger”) [Member]
Common Stock, No Par Value (in dollars per share)		$ 0
The Right to Receive, Without Interest, Shares of the Common Stock (in shares)		2.752
Merger Agreement, Liberty Bancshares, Inc. (“Liberty”) Will Merge with and into Merger Sub (the “Merger”) [Member] | Liberty Bancshares Inc [Member] | Voting Common Stock [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)		$ 1.25
Merger Agreement, Liberty Bancshares, Inc. (“Liberty”) Will Merge with and into Merger Sub (the “Merger”) [Member] | Liberty Bancshares Inc [Member] | Nonvoting Common Stock [Member]
Common Stock, No Par Value (in dollars per share)		$ 0