Note 6 - Per Share Amounts (Details Textual) - shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)	124,000	166,000
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	138,000	6,000
Restricted Stock [Member]
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)	123,000	123,000