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Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Jun. 30, 2021
Accrued Expenses      
Warranty $ 2,027 $ 1,851 $ 1,667
Travel 611 1,371  
Legal and consulting 714 661  
In-transit inventory 554 416  
Clinical studies 161 113  
Sales and use tax 115 106  
Other 1,076 744  
Total $ 5,258 $ 5,262