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Note 3 - Earnings Per Share - Anti-dilutive Securities (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Anti-dilutive options – weighted average (in shares) 1,079 1,500 1,353 1,261