Significant Balance Sheet Components - Schedule of Inventory (Details) - USD ($) $ in Thousands  | 
Dec. 31, 2021  | 
Dec. 31, 2020  | 
|---|---|---|
| Significant Balance Sheet Components [Abstract] | ||
| Devices - for resale | $ 2,952 | $ 7,792 | 
| Raw materials | 1,986 | 2,590 | 
| Accessories | 606 | 962 | 
| Total inventory | $ 5,544 | $ 11,344 | 
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- Definition Inventory accessories. No definition available. 
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- Definition Inventory devices for resale. No definition available. 
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- Definition Significant balance sheet components. No definition available. 
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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