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Accrued Expenses (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Sep. 30, 2021
Accrued Expenses      
Legal and consulting $ 1,835 $ 1,371  
Warranty 1,732 1,851 $ 1,779
Travel 918 661  
In-transit inventory 589 416  
Clinical studies 165 113  
Sales and use tax 110 106  
Other 1,604 744  
Total $ 6,953 $ 5,262