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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2022
Fair Value Disclosures [Abstract] |
Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis | The following tables present the fair value hierarchy for financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2022 and 2021 (in thousands):
|  | December 31, 2022 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds(1) |  | $ | 21,666 |  |  | $ | — |  |  | $ | — |  |  | $ | 21,666 |
Total financial assets |  | $ | 21,666 |  |  | $ | — |  |  | $ | — |  |  | $ | 21,666 |
Financial liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CVR derivative liability |  | $ | — |  |  | $ | — |  |  | $ | 5,000 |  |  | $ | 5,000 |
Total financial liabilities |  | $ | — |  |  | $ | — |  |  | $ | 5,000 |  |  | $ | 5,000 |
|  | December 31, 2021 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds(1) |  | $ | 44,347 |  |  | $ | — |  |  | $ | — |  |  | $ | 44,347 |
U.S. government agency securities(2) |  |  | 2,504 |  |  |  | — |  |  |  | — |  |  |  | 2,504 |
Total financial assets |  | $ | 46,851 |  |  | $ | — |  |  | $ | — |  |  | $ | 46,851 |
(1) | Included in cash and cash equivalents on accompanying consolidated balance sheet.
(2) | Included in short-term investments on accompanying consolidated balance sheet and are classified as available-for-sale debt securities.

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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