Balance Sheet Components - Schedule of Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Balance Sheet Components [Abstract]
Finished goods	$ 9,297	$ 5,068
Component materials	5,663	5,133
Total inventory	$ 14,960	$ 10,201

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	instant