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Investments | 9 Months Ended
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Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract] |
Investments | Investments Available-for-sale Investments The Company began investing in available-for-sale (“AFS”) investments in the fourth quarter of 2021. The following table summarizes our AFS investments. These are classified as "Short-term investments" on the condensed consolidated balance sheets.
| September 30, 2022
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized Loss |  | Fair Value
| (In thousands)
U.S. Treasury securities | $ | 35,719 |  |  | $ | — |  |  | $ | (588) |  |  | $ | 35,131 |
Corporate bonds | 37,894 |  |  | — |  |  | (547) |  |  | 37,347 |
Total available-for-sale investments | $ | 73,613 |  |  | $ | — |  |  | $ | (1,135) |  |  | $ | 72,478 |
| December 31, 2021
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized Loss |  | Fair Value
| (In thousands)
U.S. Treasury securities | $ | 8,154 |  |  | $ | — |  |  | $ | (13) |  |  | $ | 8,141 |
Corporate bonds | 7,343 |  |  | 1 |  |  | (2) |  |  | 7,342 |
Total available-for-sale investments | $ | 15,497 |  |  | $ | 1 |  |  | $ | (15) |  |  | $ | 15,483 |
The following table presents the breakdown of the AFS investments in an unrealized loss position as of September 30, 2022 and December 31, 2021, respectively.
| September 30, 2022 |  | December 31, 2021
| Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss
| (In thousands)
U.S. Treasury securities |  |  |  |  |
Less than 12 months | $ | 35,131 |  |  | $ | (588) |  |  | $ | 8,141 |  |  | $ | 13 |
Total | $ | 35,131 |  |  | $ | (588) |  |  | $ | 8,141 |  |  | $ | 13 |
Corporate bonds |  |  |  |  |  |  |
Less than 12 months | $ | 37,347 |  |  | $ | (547) |  |  | $ | 5,640 |  |  | $ | 2 |
Total | $ | 37,347 |  |  | $ | (547) |  |  | $ | 5,640 |  |  | $ | 2 |
The Company does not believe these AFS investments to be other-than-temporarily impaired as of September 30, 2022 and December 31, 2021. There were no material realized gains or losses on AFS investments during the three and nine months ended September 30, 2022 and September 30, 2021. There were no AFS investments with maturities greater than 12 months at September 30, 2022. Actual maturities may differ from the contractual maturities because the Company may sell these investments prematurely.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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