Note 10 - Earnings Per Share (Details Textual) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Common stock conversion basis			one-for-one basis
WeightedAverageNumberOfAntidilutiveConvertiblePreferredStockRestrictedStockRsusAndOperatingPartnershipUnitsOutstanding	4.2	3.0	4.1	3.0