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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2022
Fair Value Disclosures [Abstract] |
Schedule of the Company’s Assets and Liabilities that are Measured and Recognized at Fair Value on a Recurring Basis Classified Under the Appropriate Level of the Fair Value Hierarchy | The following table presents the Company’s assets and liabilities that are measured and recognized at fair value on a recurring basis classified under the appropriate level of the fair value hierarchy as of March 31, 2022 and December 31, 2021:
| Fair Value Measurements at March 31, 2022
(in thousands) | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Assets: |  |  |  |  |  |  |
Money market fund | $ | 15,824 |  |  | $ | — |  |  | $ | — |  |  | $ | 15,824 |
Corporate debt securities | — |  |  | 3,205 |  |  | — |  |  | 3,205 |
Total included in cash and cash equivalents | 15,824 |  |  | 3,205 |  |  | — |  |  | 19,029 |
Available for sale investments: |  |  |  |  |  |  |
Certificate of deposit | — |  |  | 9,239 |  |  | — |  |  | 9,239 |
Corporate debt securities | — |  |  | 69,664 |  |  | — |  |  | 69,664 |
Commercial paper | — |  |  | 10,468 |  |  | — |  |  | 10,468 |
U.S. treasury securities | 19,939 |  |  | — |  |  | — |  |  | 19,939 |
Total available for sale investments (1) | 19,939 |  |  | 89,371 |  |  | — |  |  | 109,310 |
Total assets measured at fair value on a recurring basis | $ | 35,763 |  |  | $ | 92,576 |  |  | $ | — |  |  | $ | 128,339 |
| Fair Value Measurements at December 31, 2021
(in thousands) | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Assets: |  |  |  |  |  |  |
Money market fund | $ | 10,990 |  |  | $ | — |  |  | $ | — |  |  | $ | 10,990 |
Total included in cash and cash equivalents | 10,990 |  |  | $ | — |  |  | $ | — |  |  | 10,990 |
Available for sale investments: |  |  |  |  |  |  |
Certificate of deposit | — |  |  | 1,260 |  |  | — |  |  | 1,260 |
Corporate debt securities | — |  |  | 88,390 |  |  | — |  |  | 88,390 |
Commercial paper | — |  |  | 14,454 |  |  | — |  |  | 14,454 |
Non U.S. government | — |  |  | 728 |  |  | — |  |  | 728 |
U.S. treasury securities | 24,046 |  |  | — |  |  | — |  |  | 24,046 |
Total available for sale investments (1) | 24,046 |  |  | 104,832 |  |  | $ | — |  |  | 128,878 |
Total assets measured at fair value on a recurring basis | $ | 35,036 |  |  | $ | 104,832 |  |  | $ | — |  |  | $ | 139,868 |
(1) Included in short-term investments in the accompanying balance sheets.

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- Definition Tabular disclosure of liabilities, 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). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset. + 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 http://asc.fasb.org/extlink&oid=117815213&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 http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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