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Note 12 - Preferred Stock - (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Sep. 01, 2022
Mar. 31, 2023
Dec. 31, 2022
Preferred Stock, No Par Value (in dollars per share) $ 0 $ 0 $ 0
Proceeds from Issuance of Preferred Stock and Preference Stock $ 72    
Preferred Stock, Dividend Rate, Percentage 7.50%    
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share)   $ 18.75 $ 18.75
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]      
Preferred Stock, Dividend Rate, Basis Spread on Variable Rate 4.70%