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Selected Balance Sheet Information (Schedule of Property and Equipment) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 3,978 $ 3,293
Less: Accumulated depreciation and amortization 2,280 1,868
Property and equipment, net $ 1,698 1,425
Maximum    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Estimated Useful Lives three  
Minimum    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Estimated Useful Lives P5Y  
Office furniture and equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 350 271
Lab equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 2,684 1,565
Computer equipment and software    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 618 556
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 95 88
Capital equipment in process    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 231 $ 813