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Inventories - Reserve Rollforward (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2022
Jun. 30, 2021
Inventory, Reserve [Roll Forward]            
Beginning balance $ (3,179) $ (3,050) $ (2,983) $ (2,894) $ (3,050) $ (2,894)
Accrual (56)   3   (201) (98)
Reduction due to sold inventory 241   24   257 36
Write-off for disposed inventory 202 0   0 202  
Reserves for excess, obsolete, and slow-moving inventories $ (2,792) $ (3,179) $ (2,956) $ (2,983) $ (2,792) $ (2,956)