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Goodwill and Intangible Assets - Amortization of Intangible Assets by Fiscal Year (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]    
Three months ended December 31, 2021 $ 541  
2022 2,021  
2023 1,910  
2024 1,867  
2025 1,154  
2026 160  
Thereafter 540  
Net Carrying Amount $ 8,193 $ 1,583