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Administrative Expenses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Selling, general and administrative expense [abstract]      
Personnel expenses $ 1,454 $ 1,455 $ 1,013
Audit fees 204 215 143
Consulting fees 271 329 243
Communication 16 16 12
Stationery 3 6 3
Greek tax authorities (note 19) 292 185 130
Other 636 404 347
Total $ 2,876 $ 2,610 $ 1,891