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Income Taxes - Schedule of Significant Components Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Income Tax Disclosure [Abstract] |  |
Net operating loss carryforwards | $ 9,947 | $ 7,126
Research and development tax credits | 506 | 299
Accruals and reserves | 43 | 159
Stock compensation | 391 | 301
Depreciation and amortization | 116 | 126
Lease liability | 68 |
Total deferred tax assets | 11,071 | 8,011
Right-of-use asset | (66) |
Total deferred tax liabilities | (66) |
Less: valuation allowance | $ (11,005) | $ (8,011)

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