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Cost of Sales - Schedule of cost of sales (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Schedule of cost of sales [Abstract]      
Inventory expensed $ 4,436 $ 2,998 $ 5,985
Royalties 364 257 322
Other expenses 877 1,155 816
Total $ 5,677 $ 4,410 $ 7,123