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Debt and Other Long-term Liabilities - Xcel Term Loan Remaining Principal Payments (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Debt    
Total $ 29,000 $ 16,750
New Loan Agreement    
Debt    
2022 2,500  
2023 2,500  
2024 2,500  
2025 21,500  
Total $ 29,000