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Summary of Significant Accounting Policies (as Restated) - Summary of Allowance for Doubtful Accounts (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 19, 2019
Dec. 31, 2020
Dec. 31, 2018
Accounting Policies [Abstract]      
Beginning balance   $ (10)  
Provision for doubtful accounts $ (8) (172) $ (18)
Write-offs   138  
Ending balance   $ (44)