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Balance Sheet Components - Product Warranty (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2021
Jun. 30, 2020
Product Warranty, Increase (Decrease) [Roll Forward]    
Balance at the beginning of the period $ 2,896 $ 2,318
Accruals of warranties issued 775 1,589
Settlements of warranty claims (357) $ (1,011)
Balance at the end of the period $ 3,314