Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities (Details)

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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Payables and Accruals [Abstract]    
Payroll-related accruals $ 13,266 $ 7,566
Sales and telecom taxes 1,578 1,056
Third-party commissions 605 553
Interest payable 0 19
Other 669 1,092
Total $ 16,118 $ 10,286