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Short-Term Investments (Details) $ in Thousands | Sep. 30, 2022 USD ($) item | Dec. 31, 2021 USD ($) item
--- | --- | ---
Short-term Investments |  |
Short-Term Investments |  |
Amortized Cost | $ 70,814 | $ 39,000
Gross Unrealized Losses | (215) |
Fair Value | $ 70,599 | $ 39,000
Number of short term investments in unrealized loss position for less than 12 months | item | 23 |
Aggregate value of short term investments in unrealized loss position for less than 12 months | $ 40,400 |
Number of short term investments in unrealized loss position | item |  | 0
Corporate debt securities |  |
Short-Term Investments |  |
Amortized Cost | 26,384 |
Gross Unrealized Losses | (156) |
Fair Value | 26,228 |
Treasury Bills |  |
Short-Term Investments |  |
Amortized Cost | 5,935 |
Gross Unrealized Losses | (6) |
Fair Value | 5,929 |
Yankee securities |  |
Short-Term Investments |  |
Amortized Cost | 4,995 |
Gross Unrealized Losses | (26) |
Fair Value | 4,969 |
U.S. agency bonds |  |
Short-Term Investments |  |
Amortized Cost | 3,000 |
Gross Unrealized Losses | (27) |
Fair Value | 2,973 |
Reverse repurchase agreements |  |
Short-Term Investments |  |
Amortized Cost | 30,500 | $ 39,000
Fair Value | $ 30,500 | $ 39,000

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- Definition Amount of cumulative unrecognized loss on investment in debt security measured at amortized cost (held-to-maturity) and investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126970911&loc=SL120269820-111563 + Details
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