Note 12 - Earnings Per Share (Details Textual) - shares shares in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Common stock conversion basis	one-for-one basis
Weighted average number of antidilutive convertible preferred stock, restricted stock, RSUs and OP units outstanding	3.1
Weighted average number of antidilutive convertible preferred stock and OP units outstanding		2.8