Note 2 - Acquisition - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Dec. 31, 2020	Jun. 30, 2020
Goodwill		$ 836	$ 836
Peoples Bancorp of Mt. Pleasant, Inc. [Member]
Business Combination, Consideration Transferred, Total	$ 10,405
Cash and cash equivalents	833
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Certificates of Deposit	11,839
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities	4,051
Federal bank and other restricted stocks, at cost	154
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable, Net	55,320
Premises and equipment	818
Core deposit intangible	270
Accrued interest receivable and other assets	140
Noninterest-bearing deposits	(11,979)
Interest-bearing deposits	(48,872)
Federal funds purchased	(2,348)
Federal Home Loan Bank advances	(491)
Other liabilities	(166)
Total net assets acquired	9,569
Goodwill	$ 836