Note 3 - Earnings Per Share (Details Textual) - shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Ending Balance (in shares) | 0 | 0 | 12,150 |
| Restricted Stock [Member] | |||
| Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance (in shares) | 63,646 | 76,933 | |
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 46,355 | 53,438 | |