Annual report pursuant to Section 13 and 15(d)

Supplemental Balance Sheet Information, Accrued Expenses (Details)

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Supplemental Balance Sheet Information, Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Accrued Expenses [Abstract]    
Income taxes $ 0 $ 315
Payroll 753 782
Professional services 591 208
R&D services and supplies 400 212
Other 71 167
Total $ 1,815 $ 1,684