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Accrued Sales Tax - Additional Information (Details)
$ in Thousands
3 Months Ended
Dec. 31, 2019
USD ($)
Authority
Sep. 30, 2020
USD ($)
Jun. 30, 2020
USD ($)
Payables And Accruals [Abstract]      
Number of taxing authorities | Authority 2    
Unpaid sales tax liability   $ 1,533 $ 1,411
Amounts claimed and received $ 359