Annual report pursuant to Section 13 and 15(d)

Property and Equipment - Schedule of Property and Equipment (Details)

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Property and Equipment - Schedule of Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]    
Property and equipment $ 2,428 $ 2,139
Less accumulated depreciation and amortization (1,889) (1,820)
Total property and equipment, net 539 319
Equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment 1,440 1,173
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property and equipment 112 112
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment 201 201
Computer equipment and software    
Property, Plant and Equipment [Line Items]    
Property and equipment 150 150
Loaned systems    
Property, Plant and Equipment [Line Items]    
Property and equipment $ 525 $ 503