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Composition of Certain Balance Sheet Items - Schedule of Other Accrued Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Balance Sheet Related Disclosures [Abstract]    
Government rebates $ 11,146 $ 9,412
Accrued compensation 10,474 10,144
Accrued selling and marketing costs 871 665
Legal fees 756 612
Professional fees 544 151
Other 518 202
Total accrued and other liabilities $ 24,309 $ 21,186