Note 2 - Earnings Per Share (Details Textual) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)	1.1	1.3	1.2	1.2