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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2023
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements Financial instruments recorded at fair value in the financial statements are categorized as follows: •Level 1: Observable inputs that reflect quoted prices for identical assets or liabilities in active markets. •Level 2: Observable inputs, other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. •Level 3: Unobservable inputs reflecting management's assumptions incorporated in valuation techniques used to determine fair value. These assumptions are required to be consistent with market participant assumptions that are reasonably available. The following table summarizes the assets measured at fair value on a recurring basis by level within the fair value hierarchy for the year ended December 31, 2023 (in thousands):
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Cash equivalents |  |  |  |  |  |  |
Money market funds | $ | 35,375 |  |  | $ | — |  |  | $ | — |  |  | $ | 35,375 |
Short-term investments |  |  |  |  |  |  |
US government and agency securities | 25,083 |  |  | 11,526 |  |  | — |  |  | 36,609 |
Commercial paper | — |  |  | 21,479 |  |  | — |  |  | 21,479 |
Total | $ | 60,458 |  |  | $ | 33,005 |  |  | $ | — |  |  | $ | 93,463 |
The following table summarizes the assets measured at fair value on a recurring basis by level within the fair value hierarchy for the year ended December 31, 2022 (in thousands):
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Cash equivalents |  |  |  |  |  |  |
Money market funds | $ | 41,213 |  |  | $ | — |  |  | $ | — |  |  | $ | 41,213 |
Commercial paper | — |  |  | 8,980 |  |  | — |  |  | 8,980 |
Short-term investments |  |  |  |  |  |  |
US government and agency securities | 24,944 |  |  | 11,663 |  |  | — |  |  | 36,607 |
Commercial paper | — |  |  | 14,733 |  |  | — |  |  | 14,733 |
Total | $ | 66,157 |  |  | $ | 35,376 |  |  | $ | — |  |  | $ | 101,533 |
There were no transfers of financial assets or liabilities into or out of Level 3 during the years ended December 31, 2023 or 2022. The following table summarizes the Company's short-term investments on the consolidated balance sheets as of December 31, 2023 (in thousands):
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Short-term investments |  |  |  |  |  |  |
US government and agency securities | $ | 36,568 |  |  | $ | 48 |  |  | $ | (7) |  |  | $ | 36,609 |
Commercial paper | 21,477 |  |  | 11 |  |  | (9) |  |  | 21,479 |
Total | $ | 58,045 |  |  | $ | 59 |  |  | $ | (16) |  |  | $ | 58,088 |
The following table summarizes the Company's short-term investments on the consolidated balance sheets as of December 31, 2022 (in thousands):
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Short-term investments |  |  |  |  |  |  |
US government and agency securities | $ | 36,595 |  |  | $ | 18 |  |  | $ | (6) |  |  | $ | 36,607 |
Commercial paper | 14,733 |  |  | — |  |  | — |  |  | 14,733 |
Total | $ | 51,328 |  |  | $ | 18 |  |  | $ | (6) |  |  | $ | 51,340 |
The following table summarizes the Company’s cash and cash equivalents on the consolidated balance sheets as of December 31, 2023 (in thousands):
| December 31, 2023
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Cash | $ | 15,381 |  |  | $ | — |  |  | $ | — |  |  | $ | 15,381 |
Cash equivalents |  |  |  |  |  |  |
Money market funds | 35,375 |  |  | — |  |  | — |  |  | 35,375 |
Total | $ | 50,756 |  |  | $ | — |  |  | $ | — |  |  | $ | 50,756 |
The following table summarizes the Company’s cash and cash equivalents on the consolidated balance sheets as of December 31, 2022 (in thousands):
| December 31, 2022
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Cash | $ | 11,804 |  |  | $ | — |  |  | $ | — |  |  | $ | 11,804 |
Cash equivalents |  |  |  |  |  |  |
Money market funds | 41,213 |  |  | — |  |  | — |  |  | 41,213 |
Commercial paper | 8,980 |  |  | — |  |  | — |  |  | 8,980 |
Total | $ | 61,997 |  |  | $ | — |  |  | $ | — |  |  | $ | 61,997 |
As of December 31, 2023, the weighted-average remaining contractual maturities of available for sale securities was approximately four months. No available for sale securities held as of December 31, 2023 have been in a continuous unrealized loss position for more than 12 months. As of December 31, 2023, unrealized losses on available for sale securities are not attributed to credit risk and are considered temporary. The Company believes it is more-likely-than-not that investments in an unrealized loss position will be held until maturity or the cost basis of the investment will be recovered. The Company believes it has no other-than-temporary impairments on its securities as it does not intend to sell these securities and does not believe it is more-likely-than-not that it will be required to sell these securities before the recovery of their amortized cost basis. To date, the Company has not recorded any impairment charges on securities related to other-than-temporary declines in fair value. The Company’s cash equivalents and short-term investments are due within one year from the balance sheet date. For the year ended December 31, 2023, both unrealized holding gains and losses are immaterial and the resulting net unrealized holding gain has been included in accumulated other comprehensive income. For the years ended December 31, 2022 and 2021, there were no unrealized holding gains or losses recorded in accumulated other comprehensive income. As of December 31, 2023, there was no outstanding debt, and as of December 31, 2022 the fair value of outstanding debt was $10.4 million (Level 2). The carrying amounts of certain financial instruments, including accounts receivable, accounts payable, and accrued liabilities approximate fair value due to their short-term maturities and are excluded from the fair value tables above.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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