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Selected Balance Sheet Information (Schedule of Accrued Expenses) (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Selected Balance Sheet Information [Abstract]    
Clinical trial and other professional fees $ 1,733 $ 1,607
Bonuses 2,303 2,028
Paid time off 960 699
Customer rebates 256 380
Operating lease liability, current portion 222  
Taxes 120 351
Other 775 333
Total accrued expenses $ 6,369 $ 5,398