Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]      
Write-down of inventory $ 367 $ 55 $ 44