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Operating Expenses, General and Administrative Expenses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
General and Administrative Expenses [abstract]      
Total Compensation to Employees and Directors $ 11,890 $ 14,163 $ 10,331
Office and Administrative Expenses 3,351 2,413 2,633
Audit, Legal and Consultancy 1,325 1,313 1,826
Total General and Administrative Expenses $ 16,565 $ 17,890 $ 14,789