| Schedule of balance sheet components |
| | | | | | | | | | December 31, | | December 31, | | | | 2021 | | 2020 | | Prepaid and Other Current Assets | | | | | | | | Interest receivable | | $ | 32 | | $ | 86 | | Prepaid research and development manufacturing expenses | | | 740 | | | 181 | | Prepaid facility expenses | | | 174 | | | 160 | | Prepaid insurance | | | 280 | | | 244 | | Other | | | 128 | | | 406 | | | | $ | 1,354 | | $ | 1,077 | | Property and Equipment | | | | | | | | Laboratory equipment | | $ | 2,477 | | $ | 2,472 | | Computer equipment and purchased software | | | 142 | | | 142 | | Leasehold improvements | | | 2,084 | | | 2,084 | | | | | 4,703 | | | 4,698 | | Less: accumulated depreciation and amortization | | | (4,252) | | | (3,792) | | | | $ | 451 | | $ | 906 | | Accrued and Other Liabilities | | | | | | | | Accrued clinical trial expense | | $ | 4,010 | | $ | 4,681 | | Accrued manufacturing expense | | | 839 | | | 321 | | Personnel related | | | 1,846 | | | 2,225 | | Accrued legal and accounting | | | 265 | | | 197 | | Other | | | 121 | | | 180 | | | | $ | 7,081 | | $ | 7,604 | |
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