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Organization and Description of Business (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
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Organization and Description of Business |  |
Cash and cash equivalents | $ 7,600 | $ 6,451
Short-term held-to-maturity investments | 931 | 2,606
Gross proceeds to date | 91,000 |
Accumulated deficit | $ (91,430) | $ (88,523)

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