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Note 6 - Per Share Amounts (Details Textual) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares) 0 78,000 129,000 79,000
Share-Based Payment Arrangement, Option [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 82,000   64,000 41,000
Restricted Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 121,000      
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares) 123,000 123,000 123,000 123,000