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Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2023
Fair Value Disclosures [Abstract] |
Cash, Cash Equivalents and Investments | The following tables summarize the estimated value of cash equivalents and restricted cash (in thousands):
| June 30, 2023
| Adjusted Cost |  | Unrealized Gain |  | Unrealized Loss |  | Estimated Fair Value |  | Cash and cash equivalents |  | Restricted cash |  | Short-term investments
Cash | $ | 4,559 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,559 |  |  | $ | 4,559 |  |  | $ | — |  |  | $ | — |
Level 1: |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds | 35,529 |  |  | — |  |  | — |  |  | 35,529 |  |  | 32,193 |  |  | 3,336 |  |  | — |
Subtotal | 35,529 |  |  | — |  |  | — |  |  | 35,529 |  |  | 32,193 |  |  | 3,336 |  |  | — |
Level 2: |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities | 6,482 |  |  | — |  |  | — |  |  | 6,482 |  |  | — |  |  | — |  |  | 6,482 |
U.S. agency securities | 13,907 |  |  | 1 |  |  | (1) |  |  | 13,907 |  |  | — |  |  | — |  |  | 13,907 |
Commercial Paper | 2,494 |  |  | — |  |  | — |  |  | 2,494 |  |  | — |  |  | — |  |  | 2,494 |
Corporate debt securities | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Subtotal | 22,883 |  |  | 1 |  |  | (1) |  |  | 22,883 |  |  | — |  |  | — |  |  | 22,883 |
Total | $ | 62,971 |  |  | $ | 1 |  |  | $ | (1) |  |  | $ | 62,971 |  |  | $ | 36,752 |  |  | $ | 3,336 |  |  | $ | 22,883 |
| December 31, 2022
| Adjusted Cost |  | Unrealized Gain |  | Unrealized Loss |  | Estimated Fair Value |  | Cash and cash equivalents |  | Restricted cash |  | Short-term investments
Level 1: |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds | $ | 45,412 |  |  | $ | — |  |  | $ | — |  |  | $ | 45,412 |  |  | $ | 42,046 |  |  | $ | 3,366 |  |  | $ | — |
Subtotal | 45,412 |  |  | — |  |  | — |  |  | 45,412 |  |  | 42,046 |  |  | 3,366 |  |  | — |
Level 2: |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities | 14,866 |  |  | 4 |  |  | (3) |  |  | 14,867 |  |  | — |  |  | — |  |  | 14,867 |
U.S. agency securities | 5,938 |  |  | — |  |  | — |  |  | 5,938 |  |  | 3,983 |  |  | — |  |  | 1,955 |
Commercial Paper | 28,122 |  |  | — |  |  | — |  |  | 28,122 |  |  | 5,994 |  |  | — |  |  | 22,128 |
Corporate debt securities | 7,590 |  |  | 1 |  |  | (1) |  |  | 7,590 |  |  | 5,598 |  |  | — |  |  | 1,992 |
Subtotal | 56,516 |  |  | 5 |  |  | (4) |  |  | 56,517 |  |  | 15,575 |  |  | — |  |  | 40,942 |
Total | $ | 101,928 |  |  | $ | 5 |  |  | $ | (4) |  |  | $ | 101,929 |  |  | $ | 57,621 |  |  | $ | 3,366 |  |  | $ | 40,942 |
Summary of Changes in Fair Value of Level 3 Financial Instruments | The following table presents a summary of the changes in the fair value of the Company’s Level 3 financial instruments (in thousands):
|  | Contingent Earnout Liability
Fair value as of December 31, 2022 |  | $ | (227) |
Change in fair value included in other income (expense) |  | 207 |
Fair value as of June 30, 2023 |  | $ | (20) |

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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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