v3.26.1
Note 4 - Transactions With Related Parties 1 (Details Textual)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 29, 2021
USD ($)
Mar. 31, 2020
Mar. 31, 2023
USD ($)
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Jan. 01, 2018
Management Fees, Related Parties           $ 14,784,000 $ 14,178,000    
Voyage Expenses Related Parties           5,032,000 5,819,000    
Operating Costs and Expenses           84,089,000 79,171,000    
Costamare Shipping Company SA and Costamare Shipping Services Ltd. [Member]                  
Management Fee Per Day, Per Vessel       $ 1,020.00   1,020.00      
Management Fee Per Day, Per Vessel Under Bareboat Charter       510   510      
Construction Supervisory Fee           $ 840,000      
Commission Charged on Charter Hire Agreements           1.25%      
Quarterly Fee to Related Parties           $ 667,000      
Quarterly Fee to Related Parties, Shares (in shares) | shares           149,600      
Management Fees, Related Parties           $ 11,106,000 10,925,000    
Amounts Paid to Third Party Managers           2,904,000 2,787,000    
Voyage Expenses Related Parties           4,622,000 5,123,000    
Officers Compensation Charged, Period End           1,333,000 1,333,000    
Fair Value of Shares Issued to Manager           $ 4,626,000 2,835,000    
Stock Issued During Period, Shares, New Issues (in shares) | shares           299,200      
Working Capital Security       9,240,000   $ 9,240,000      
Accounts Receivable, after Allowance for Credit Loss       3,191,000 $ 2,513,000 3,191,000      
Accounts Payable, Current       302,000 387,000 302,000      
Other Third-party Managers [Member]                  
Working Capital Security       2,025,000 2,025,000 2,025,000      
Other Third-party Managers [Member] | Minimum [Member]                  
Working Capital Security Per Vessel       75,000   75,000      
Other Third-party Managers [Member] | Maximum [Member]                  
Working Capital Security Per Vessel       $ 50,000   50,000      
Blue Net Chartering GmbH & Co. KG (Containerships Only) [Member]                  
Voyage Expenses Related Parties           410,000 356,000    
Percentage Ownership                 50.00%
Annual Fee to Related Parties | €               € 9,413  
Annual Fee to Related Parties, Chartered in Current Period | €               € 1,281  
Vessels Under Time Charter 4                
Daily Brokerage Commission on Time Charter $ 165                
Blue Net Asia Pte., Ltd. (“BNA”) (Containerships Only) [Member]                  
Commission Charged on Charter Hire Agreements   1.25%              
Voyage Expenses Related Parties           $ 0 340,000    
Percentage Ownership   50.00%              
Vessels Under Time Charter   5              
Chairman and Chief Executive Officer, Konstantinos Konstantakopoulos [Member] | Acquisition by Joint Venture [Member]                  
Joint Venture, Ownership, Percent       17.00%   17.00%      
Chairman and Chief Executive Officer, Konstantinos Konstantakopoulos [Member] | Neptune Global Finance Ltd. (“NGF”) [Member]                  
Subsidiary, Ownership Percentage, Parent     51.00%            
Neptune Global Finance Ltd. (“NGF”) [Member] | Neptune Maritime Leasing Limited (“NML”) [Member]                  
Management Fees, Related Parties           $ 2,045,000 1,624,000    
Accounts Receivable, after Allowance for Credit Loss       $ 1,047,000 935,000 $ 1,047,000      
Fee Percentage on Contributed Capital Invested     1.50%            
Fee Percentage on Committed Capital to be Invested     0.80%            
Coupon Payable to Minority Interest       $ 840,000 850,000        
Neptune Maritime Leasing Limited (“NML”) [Member] | Acquisition by Third Parties [Member]                  
Sale Leaseback Transaction, Lease Term (Year)           5 years      
Number of Handysize Bulkers Sold       4   4      
Neptune Maritime Leasing Limited (“NML”) [Member] | Acquisition by Joint Venture [Member]                  
Sale Leaseback Transaction, Lease Term (Year)           5 years      
Number of Platform Supply Vessels Ordered       8   8      
Neptune Maritime Leasing Limited (“NML”) [Member] | Backend Fee [Member]                  
Related Party Transaction, Amounts of Transaction           $ 4,500,000      
Neptune Maritime Leasing Limited (“NML”) [Member] | Loan Origination Fees [Member]                  
Related Party Transaction, Amounts of Transaction           3,960,000      
Neptune Maritime Leasing Limited (“NML”) [Member] | Neptune Global Finance Ltd. (“NGF”) [Member]                  
Subsidiary, Ownership Percentage, Noncontrolling Owner     49.00%            
Codrus [Member] | Financial And Strategic Advice [Member]                  
Accounts Receivable, after Allowance for Credit Loss       $ 0 0 0      
Annual Fee to Related Parties     $ 250,000            
Navilands [Member] | Asset Management Arrangement [Member]                  
Management Fees, Related Parties           1,633,000 $ 1,629,000    
Working Capital Security       1,125,000 1,125,000 1,125,000      
Working Capital Security Per Vessel       75,000   75,000      
Accounts Receivable, after Allowance for Credit Loss       $ 4,548,000 $ 2,539,000 4,548,000      
Navilands [Member] | Asset Management Arrangement [Member] | Subscription Fees [Member]                  
Operating Costs and Expenses           $ 41,000