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Inventory, Net - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Inventory Disclosure [Abstract]        
Inventory impairment charges $ 13 $ 163 $ 78 $ 485