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Inventories, Net - Schedule of Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Inventory, Net, Items Net of Reserve Alternative [Abstract]    
Finished goods $ 15,482 $ 12,747
Work in process 238 16
Component parts 11,484 6,105
Service parts 2,743 2,770
Inventories-net $ 29,947 $ 21,638