Other Real Estate Owned - Changes in Other Real Estate Owned (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Note 6 - Other Real Estate Owned - Changes in Other Real Estate Owned ("OREO") (Details)
Balance at beginning of year	$ 0	$ 239,000	$ 0
Acquisitions	0	0	239,000
Reductions to carrying value	0	(31,000)	0
Sales	0	(208,000)	0
Balance at end of year	$ 0	$ 0	$ 239,000