Note 2 - Acquisition - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2020	Jun. 30, 2020	Jun. 30, 2019
Business Combination, Consideration Transferred, Total		$ 10,405
Certificates of deposit in other financial institutions		11,839
Securities, available-for-sale		4,051
Federal bank and other restricted stocks, at cost		154
Loans, net		55,320
Premises and equipment		818
Core deposit intangible		270
Accrued interest receivable and other assets		140
Federal funds purchased		(2,348)
Federal Home Loan Bank advances		(491)
Other liabilities		(166)
Goodwill, Ending Balance		$ 836	$ 0
Peoples Bancorp of Mt. Pleasant, Inc. [Member]
Business Combination, Consideration Transferred, Total	$ 10,405
Cash and cash equivalents	833
Certificates of deposit in other financial institutions	11,839
Securities, available-for-sale	4,051
Federal bank and other restricted stocks, at cost	154
Loans, 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, Ending Balance	$ 836