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Supplemental Balance Sheet Information (Tables) | 6 Months Ended
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Jun. 30, 2020
Supplemental Balance Sheet Information [Abstract] |
Prepaid Expense and Other Current Assets | Prepaid expenses and other current assets
| June 30, 2020 |  | December 31, 2019
Prepaid clinical, contract research and manufacturing costs | $ | 2,203 |  |  | $ | 481 |
Interest receivable | 221 |  |  | 236 |
Prepaid insurance | 212 |  |  | 533 |
Other | 952 |  |  | 705 |
Prepaid expenses and other current assets | $ | 3,588 |  |  | $ | 1,955 |
Property and Equipment, Net | Property and equipment, net
| June 30, 2020 |  | December 31, 2019
Scientific equipment | $ | 3,315 |  |  | $ | 2,795 |
Leasehold improvements | 192 |  |  | 192 |
Computers and software | 48 |  |  | 32 |
Furniture and fixtures | 41 |  |  | 41 |
Construction in process | 2,512 |  |  | 356 |
Property and equipment, gross | 6,108 |  |  | 3,416 |
Less: accumulated depreciation | (1,644) |  |  | (1,317) |
Property and equipment, net | $ | 4,464 |  |  | $ | 2,099 |
Other Noncurrent Assets | Other noncurrent assets
| June 30, 2020 |  | December 31, 2019
Restricted cash | $ | 1,200 |  |  | $ | — |
Prepaid lease costs | 823 |  |  | — |
Prepaid services | 233 |  |  | — |
Operating lease asset | — |  |  | 356 |
Other | 10 |  |  | 32 |
Total other noncurrent assets | $ | 2,266 |  |  | $ | 388 |
Accrued Expenses and Other Current Liabilities | Accrued expenses and other current liabilities
| June 30, 2020 |  | December 31, 2019
Accrued payroll-related expenses | $ | 706 |  |  | $ | 920 |
Accrued legal expenses | 362 |  |  | 254 |
Accrued clinical, contract research and manufacturing costs | 303 |  |  | 515 |
Common stock warrant liability | 257 |  |  | — |
Operating lease liability | 196 |  |  | 292 |
Accrued other expenses | 123 |  |  | 454 |
Accrued expenses and other current liabilities | $ | 1,947 |  |  | $ | 2,435 |
Other Noncurrent Liabilities | Other noncurrent liabilities
| June 30, 2020 |  | December 31, 2019
Operating lease liability | $ | — |  |  | $ | 59 |
Total other noncurrent liabilities | $ | — |  |  | $ | 59 |

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- Definition Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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