XML 85 R72.htm IDEA: XBRL DOCUMENT v3.22.0.1
Inventory - Write-down (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Inventory      
Inventory write-downs $ 997 $ 1,349 $ 944