Note 10 - Stock Compensation Plans - Status of Shares Under the RRP and Stock Incentive Plan (Details) - The RRP and Stock Incentive Plan [Member] - Restricted Stock [Member] - $ / shares	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Unvested at the beginning of the period (in shares)	18,845	28,266
Unvested at the beginning of the period (in dollars per share)	$ 13.30	$ 13.30
Granted, number of shares (in shares)	0	0
Granted, weighted average grant date fair value (in dollars per share)	$ 0	$ 0
Vested, number of shares (in shares)	(9,123)	(9,421)
Vested, weighted average grant date fair value (in dollars per share)	$ 13.30	$ 13.30
Forfeited, number of shares (in shares)	(600)	0
Forfeited, weighted average grant date fair value (in dollars per share)	$ 13.30	$ 0
Unvested at the end of the period (in shares)	9,122	18,845
Unvested at the end of the period (in dollars per share)	$ 13.30	$ 13.30