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Administrative Expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Selling, general and administrative expense [abstract]      
Personnel expenses $ 1,971 $ 1,454 $ 1,455
Audit fees 227 204 215
Consulting fees 275 271 329
Communication 21 16 16
Stationery 3 3 6
Greek tax authorities (note 17) 236 292 185
Other 808 636 404
Total $ 3,541 $ 2,876 $ 2,610