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Property and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Property and Equipment      
Property and equipment, gross $ 2,077 $ 1,341  
Accumulated depreciation (1,131) (993)  
Property and equipment, net 946 348  
Depreciation expense $ 138 39 $ 143
Minimum      
Property and Equipment      
Useful life 3 years    
Maximum      
Property and Equipment      
Useful life 10 years    
Research, manufacturing and clinical equipment      
Property and Equipment      
Property and equipment, gross $ 548 283  
Research, manufacturing and clinical equipment | Minimum      
Property and Equipment      
Useful life 5 years    
Research, manufacturing and clinical equipment | Maximum      
Property and Equipment      
Useful life 10 years    
Computer, software and other office equipment      
Property and Equipment      
Useful life 5 years    
Property and equipment, gross $ 1,201 933  
Furniture and fixtures      
Property and Equipment      
Useful life 7 years    
Property and equipment, gross $ 203 0  
Automobile      
Property and Equipment      
Useful life 5 years    
Property and equipment, gross $ 125 $ 125