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Debt - Future payments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Estimated future principal payments    
2022 $ 0  
2023 0  
2024 2,083  
2025 12,500  
2026 10,417  
Total debt 25,000  
Interest expense $ 797 $ 340