(U.S. Dollars in thousands)

At June 30, 2025

​

At December 31, 2024

Operating expenses

​

$

2,928

​

$

3,629

​

Interest expenses

​

4,969

​

4,936

​

EU ETS current liability (1)

​

​

4,075

​

​

—

​

Other expenses

​

6,455

​

2,900

​

Total accrued expenses

​

$

18,427

​

$

11,465

​