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Balance Sheet Components - Prepaid and Other Current Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Prepaid and Other Current Assets |  |
Interest receivable | $ 128 | $ 329
Prepaid research and development manufacturing expenses | 81 | 240
Prepaid facility expenses | 160 | 157
Prepaid insurance | 521 | 150
Other | 413 | 486
Total of prepaid and other current assets | $ 1,303 | $ 1,362

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X
- Definition Amount of asset related to consideration paid in advance for research and development expense that provides economic benefits within a future period of one year or the normal operating cycle, if longer. + References No definition available. + Details
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