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Fair Value of Financial Instruments (Tables) | 6 Months Ended
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Jun. 30, 2022
Fair Value Disclosures [Abstract] |
Financial Assets Measured at Fair Value on a Recurring Basis | Financial assets measured at fair value on a recurring basis were as follows (in thousands):
| Fair Value Measurements at June 30, 2022
| Total |  | Level 1 |  | Level 2
Assets: |  |  |  |  |
Money market funds | $ | 8,162 |  |  | $ | 8,162 |  |  | $ | — |
U.S. Treasury securities | 105,837 |  |  | 105,837 |  |  | — |
Corporate debt securities | 6,434 |  |  | — |  |  | 6,434 |
Total assets measured at fair value(a) | $ | 120,433 |  |  | $ | 113,999 |  |  | $ | 6,434 |
| Fair Value Measurements at December 31, 2021
| Total |  | Level 1 |  | Level 2
Assets: |  |  |  |  |
Money market funds | $ | 17,202 |  |  | $ | 17,202 |  |  | $ | — |
U.S. Treasury securities | 81,132 |  |  | 81,132 |  |  | — |
Government-sponsored enterprises | 7,734 |  |  | — |  |  | 7,734 |
Corporate debt securities | 37,280 |  |  | — |  |  | 37,280 |
Total assets measured at fair value(b) | $ | 143,348 |  |  | $ | 98,334 |  |  | $ | 45,014 |
(a) Total assets measured at fair value at June 30, 2022 includes approximately $8.2 million reported in cash and cash equivalents on the consolidated balance sheet. (b) Total assets measured at fair value at December 31, 2021 includes approximately $23.2 million reported in cash and cash equivalents on the consolidated balance sheet.

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + 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 3 -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI https://asc.fasb.org/extlink&oid=126976982&loc=SL7498348-110258 Reference 4: 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 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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