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Debt - Xcel Term Loan Fixed Installments (Details) - Xcel Term Loan
$ in Thousands
3 Months Ended
Sep. 30, 2020
USD ($)
Debt  
Repayment of loan as a percentage of Excess cash flow 50.00%
Minimum principal payment $ 4,450
December 31, 2020  
Debt  
Quarterly installment payments on term loans 750
March 31, 2021, June 30, 2021, September 30, 2021, and December 31, 2021  
Debt  
Quarterly installment payments on term loans 700
March 31, 2022, June 30, 2022, September 30, 2022, and December 31, 2022  
Debt  
Quarterly installment payments on term loans 1,125
March 31, 2023, June 30, 2023, September 30, 2023, and December 31, 2023  
Debt  
Quarterly installment payments on term loans $ 1,250