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Balance Sheet Components (Changes in Reserve for Product Warranties) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Balance Sheet Components [Abstract]        
Balance at beginning of period $ 1,174 $ 179 $ 594 $ 161
Additions charged to cost of product revenue 912 412 1,865 615
Repairs and replacements (477) (320) (850) (505)
Balance at end of period $ 1,609 $ 271 $ 1,609 $ 271