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Note 3 - Balance Sheet Components - Schedule of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Payroll and related $ 1,397 $ 1,052
Preclinical and clinical 6,727 707
Prepaid sublease 227 0
Professional services 50 169
Other 15 395
Accrued Liabilities, Current, Total $ 8,416 $ 2,323