v3.26.1
Note 14 - Stockholders' Equity (Details Textual)
6 Months Ended 12 Months Ended
Oct. 15, 2025
USD ($)
$ / shares
shares
May 06, 2025
shares
Apr. 29, 2025
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
$ / shares
shares
Dec. 31, 2025
$ / shares
shares
Nov. 30, 2021
USD ($)
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.0001      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares) | shares       0      
Treasury Stock, Shares, Acquired (in shares) | shares         0    
Common Stock, Shares, Issued (in shares) | shares       131,897,117      
Common Stock, Shares, Outstanding (in shares) | shares       120,892,607      
Stock Issued During Period, Value, New Issues       $ 4,778,000 $ 2,993,000    
Dividends, Preferred Stock, Cash       $ 10,460,000 $ 10,460,000    
Costamare Bulkers Inc. (“CBI”) [Member]              
Conversion of Stock, Shares Issued (in shares) | shares   5       5  
Costamare Shareholders [Member] | Costamare Bulkers [Member]              
Stock Issued During Period, Shares, New Issues (in shares) | shares     24,022,218        
O 2024 Q4 Dividends [Member]              
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares         $ 0.115    
Dividends, Common Stock, Cash         $ 13,715,000    
Common Stock Dividends, Shares (in shares) | shares         7,056    
O, 2025, Q1 Dividends [Member]              
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares         $ 0.115    
Dividends, Common Stock, Cash         $ 13,734,000    
Common Stock Dividends, Shares (in shares) | shares         8,635    
O, 2025, Q4 Dividends [Member]              
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares       $ 0.115      
Dividends, Common Stock, Cash       $ 13,789,000      
Common Stock Dividends, Shares (in shares) | shares       4,830      
O 2026 Q1 Dividends [Member]              
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares       $ 0.115      
Dividends, Common Stock, Cash       $ 13,813,000      
Common Stock Dividends, Shares (in shares) | shares       4,648      
Common Stock [Member]              
Stock Issued During Period, Shares, New Issues (in shares) | shares       308,678 314,891    
Stock Repurchase Program, Authorized Amount             $ 150,000,000
Share Repurchase Program, Remaining Authorized, Amount       $ 29,905,000      
Stock Issued During Period, Value, New Issues       0 $ 0    
Dividends, Preferred Stock, Cash       $ (0) $ (0)    
Preferred Stock [Member]              
Stock Repurchase Program, Authorized Amount             $ 150,000,000
Common Stock Issued for the Services Agreement [Member]              
Stock Issued During Period, Shares, New Issues (in shares) | shares       299,200 299,200    
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.0001 $ 0.0001    
Common Stock Issued for Dividend Reinvestment Plan [Member]              
Stock Issued During Period, Shares, New Issues (in shares) | shares       9,478   31,096  
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.0001   $ 0.0001  
Shares Issued, Price Per Share (in dollars per share) | $ / shares       $ 15.8722   $ 10.534  
Series E Preferred Stock [Member]              
Preferred Stock, Votes per Share 50,000            
Preferred Stock, Redemption Price Per Share (in dollars per share) | $ / shares $ 1            
Series E Preferred Stock [Member] | Chairman and Chief Executive Officer, Konstantinos Konstantakopoulos [Member]              
Stock Issued During Period, Shares, New Issues (in shares) | shares 1,200            
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares $ 0.0001            
Stock Issued During Period, Value, New Issues $ 1,200            
Series B Preferred Stock [Member] | O, 2024, Q4 October 15, 2024 to January 14, 2025, Dividends [Member]              
Dividends, Preferred Stock, Cash         $ 939,000    
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares         $ 0.476563    
Series B Preferred Stock [Member] | O, 2025, Q1, January 15, 2025 to April 14, 2025 Dividends [Member]              
Dividends, Preferred Stock, Cash         $ 939,000    
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares         $ 0.476563    
Series B Preferred Stock [Member] | O, 2025, Q4 October 15, 2025 to January 14, 2026, Dividends [Member]              
Dividends, Preferred Stock, Cash       $ 939,000      
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares       $ 0.476563      
Series B Preferred Stock [Member] | O, 2026, Q1,January 15, 2026 to April 14, 2026, Dividends [Member]              
Dividends, Preferred Stock, Cash       $ 939,000      
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares       $ 0.476563      
Series B Preferred Stock [Member] | Preferred Stock [Member]              
Stock Issued During Period, Shares, New Issues (in shares) | shares       0 0    
Stock Issued During Period, Value, New Issues       $ 0 $ 0    
Dividends, Preferred Stock, Cash       (0) (0)    
Series C Preferred Stock [Member] | O, 2024, Q4 October 15, 2024 to January 14, 2025, Dividends [Member]              
Dividends, Preferred Stock, Cash         $ 2,111,000    
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares         $ 0.53125    
Series C Preferred Stock [Member] | O, 2025, Q1, January 15, 2025 to April 14, 2025 Dividends [Member]              
Dividends, Preferred Stock, Cash         $ 2,111,000    
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares         $ 0.53125    
Series C Preferred Stock [Member] | O, 2025, Q4 October 15, 2025 to January 14, 2026, Dividends [Member]              
Dividends, Preferred Stock, Cash       $ 2,111,000      
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares       $ 0.53125      
Series C Preferred Stock [Member] | O, 2026, Q1,January 15, 2026 to April 14, 2026, Dividends [Member]              
Dividends, Preferred Stock, Cash       $ 2,111,000      
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares       $ 0.53125      
Series C Preferred Stock [Member] | Preferred Stock [Member]              
Stock Issued During Period, Shares, New Issues (in shares) | shares       0 0    
Stock Issued During Period, Value, New Issues       $ 0 $ 0    
Dividends, Preferred Stock, Cash       (0) (0)    
Series D Preferred Stock [Member] | O, 2024, Q4 October 15, 2024 to January 14, 2025, Dividends [Member]              
Dividends, Preferred Stock, Cash         $ 2,180,000    
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares         $ 0.546875    
Series D Preferred Stock [Member] | O, 2025, Q1, January 15, 2025 to April 14, 2025 Dividends [Member]              
Dividends, Preferred Stock, Cash         $ 2,180,000    
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares         $ 0.546875    
Series D Preferred Stock [Member] | O, 2025, Q4 October 15, 2025 to January 14, 2026, Dividends [Member]              
Dividends, Preferred Stock, Cash       $ 2,180,000      
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares       $ 0.546875      
Series D Preferred Stock [Member] | O, 2026, Q1,January 15, 2026 to April 14, 2026, Dividends [Member]              
Dividends, Preferred Stock, Cash       $ 2,180,000      
Preferred Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares       $ 0.546875      
Series D Preferred Stock [Member] | Preferred Stock [Member]              
Stock Issued During Period, Shares, New Issues (in shares) | shares       0 0    
Stock Issued During Period, Value, New Issues       $ 0 $ 0    
Dividends, Preferred Stock, Cash       $ (0) $ (0)