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Intangible Assets - Amortization expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Definite-lived intangible assets          
2023 $ 214   $ 214    
2024 855   855    
2025 855   855    
2026 855   855    
2027 855   855    
Thereafter 3,608   3,608    
Total 7,242   7,242   $ 7,883
Cost of sales          
Definite-lived intangible assets          
Amortization expense $ 214 $ 114 $ 641 $ 560