Note 11 - Shareholders' Equity (Details Textual) - USD ($)		3 Months Ended		6 Months Ended	9 Months Ended
	Aug. 26, 2020	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Preferred Stock, Par or Stated Value Per Share (in dollars per share)		$ 0.01			$ 0.01		$ 0.01
Payments of Ordinary Dividends, Preferred Stock and Preference Stock					$ 2,154,000	$ 2,625,000
Conversion of Preferred Stock to Common Stock [Member]
Conversion of stock, shares converted (in shares)					529,000
Conversion of Stock, Shares Issued (in shares)					4,408,324
Series A Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)	2,000,000
Preferred Stock, Dividend Rate, Percentage	7.00%			7.00%
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01
Shares Issued, Price Per Share (in dollars per share)	$ 25.00
Proceeds from Issuance of Preferred Stock and Preference Stock	$ 48,300,000
Payments of Ordinary Dividends, Preferred Stock and Preference Stock		$ 644,000	$ 875,000		$ 2,200,000	$ 2,600,000
Preferred Stock, Conversion Price (in dollars per share)	$ 3.00
Preferred Stock, Mandatory Conversion, Percentage Stock Price Exceeds Conversion Price	125.00%