Quarterly report pursuant to Section 13 or 15(d)

Supplemental Balance Sheet Information, Property and Equipment, Net (Details)

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Supplemental Balance Sheet Information, Property and Equipment, Net (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Property and Equipment, net [Abstract]      
Total property and equipment $ 25   $ 25
Less accumulated depreciation (25)   (25)
Property and equipment, net 0   0
Depreciation expense 0 $ 1  
Equipment [Member]      
Property and Equipment, net [Abstract]      
Total property and equipment 20   20
Furniture [Member]      
Property and Equipment, net [Abstract]      
Total property and equipment $ 5   $ 5