Note 6 - Per Share Amounts (Details Textual) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)	39,000	20,000	38,000	0
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	91,000	346,000	91,000	48,000
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)				13,000
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)	123,000	235,000	123,000