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Commitment and Contingencies (Tables)
 9 Months Ended
Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]  
Estimated Indirect Tax Liability
The following table summarizes the estimated indirect tax liability activity during the nine months ended September 30, 2021:
September 30,
2021
(in thousands)
Balance, January 1, 2021$921 
Additions1,040 
Payments(162)
 Adjustment to Expense(27)
Balance, September 30, 2021$1,772