v3.26.1
Long-Term borrowings (Details) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Long-Term borrowings    
Outstanding Loan Balance $ 726,797,584 $ 609,771,403
Unamortized Deferred Financing Fees 4,353,972 4,732,246
Total 722,443,612 605,039,157
Other Finance-lease liabilities 50,171 $ 60,740
Total $ 722,493,783  
Vessels | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.49%  
Milos    
Long-Term borrowings    
Outstanding Loan Balance $ 28,175,000  
Unamortized Deferred Financing Fees 100,703  
Total $ 28,074,297  
Milos | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.75%  
Poliegos    
Long-Term borrowings    
Outstanding Loan Balance $ 24,888,000  
Unamortized Deferred Financing Fees 187,887  
Total $ 24,700,113  
Poliegos | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.60%  
Kimolos    
Long-Term borrowings    
Outstanding Loan Balance $ 25,600,000  
Unamortized Deferred Financing Fees 75,444  
Total $ 25,524,556  
Kimolos | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.90%  
Folegandros    
Long-Term borrowings    
Outstanding Loan Balance $ 25,600,000  
Unamortized Deferred Financing Fees 75,444  
Total $ 25,524,556  
Folegandros | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.90%  
Nissos Sikinos    
Long-Term borrowings    
Outstanding Loan Balance $ 33,337,500  
Unamortized Deferred Financing Fees 168,935  
Total $ 33,168,565  
Nissos Sikinos | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.85%  
Nissos Sifnos    
Long-Term borrowings    
Outstanding Loan Balance $ 33,337,500  
Unamortized Deferred Financing Fees 170,155  
Total $ 33,167,345  
Nissos Sifnos | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.85%  
Nissos Piperi    
Long-Term borrowings    
Outstanding Loan Balance $ 44,475,000  
Unamortized Deferred Financing Fees 265,017  
Total $ 44,209,983  
Nissos Piperi | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.30%  
Nissos Serifopoula    
Long-Term borrowings    
Outstanding Loan Balance $ 44,475,000  
Unamortized Deferred Financing Fees 206,967  
Total $ 44,268,033  
Nissos Serifopoula | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.30%  
Nissos Tigani    
Long-Term borrowings    
Outstanding Loan Balance $ 45,000,000  
Unamortized Deferred Financing Fees 331,850  
Total $ 44,668,150  
Nissos Tigani | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.20%  
Nissos Rhenia    
Long-Term borrowings    
Outstanding Loan Balance $ 50,000,000  
Unamortized Deferred Financing Fees 316,052  
Total $ 49,683,948  
Nissos Rhenia | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.25%  
Nissos Despotiko    
Long-Term borrowings    
Outstanding Loan Balance $ 50,000,000  
Unamortized Deferred Financing Fees 421,451  
Total $ 49,578,549  
Nissos Despotiko | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.30%  
Nissos Donoussa    
Long-Term borrowings    
Outstanding Loan Balance $ 50,035,000  
Unamortized Deferred Financing Fees 732,988  
Total $ 49,302,012  
Nissos Donoussa | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.65%  
Nissos Kythnos    
Long-Term borrowings    
Outstanding Loan Balance $ 51,674,584  
Unamortized Deferred Financing Fees 150,994  
Total $ 51,523,590  
Nissos Kythnos | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.40%  
Nissos Kythnos | $60.0 Million Secured Term Loan Facility    
Long-Term borrowings    
Agreement amount $ 60,000,000  
Nissos Keros    
Long-Term borrowings    
Outstanding Loan Balance 35,400,000  
Unamortized Deferred Financing Fees 104,334  
Total $ 35,295,666  
Nissos Keros | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.90%  
Nissos Anafi    
Long-Term borrowings    
Outstanding Loan Balance $ 61,000,000  
Unamortized Deferred Financing Fees 340,422  
Total $ 60,659,578  
Nissos Anafi | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.40%  
Nissos Kea    
Long-Term borrowings    
Outstanding Loan Balance $ 61,400,000  
Unamortized Deferred Financing Fees 366,097  
Total $ 61,033,903  
Nissos Kea | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.35%  
Nissos Nikouria    
Long-Term borrowings    
Outstanding Loan Balance $ 62,400,000  
Unamortized Deferred Financing Fees 339,232  
Total $ 62,060,768  
Nissos Nikouria | SOFR    
Long-Term borrowings    
Adjustment to interest rate basis 1.40%