XML 20 R12.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Marketable Securities | 3 Months Ended
--- | ---
Mar. 31, 2024
Marketable Securities [Abstract] |
Marketable Securities | 3. Marketable Securities The following tables summarize the Company's marketable securities accounted for as available-for-sale securities (in thousands, except years):
| March 31, 2024 |
| Maturity (in years) | Amortized cost |  |  | Unrealized gains |  |  | Unrealized losses |  |  | Estimated fair value |
U.S. Treasury securities | 1 or less | $ | 63,024 |  |  | $ | 33 |  |  | $ | — |  |  | $ | 63,057 |
U.S. government agency securities | 1 or less |  | 36,588 |  |  |  | 16 |  |  |  | (23 | ) |  |  | 36,581 |
U.S. Treasury securities | 1-2 |  | 21,998 |  |  |  | 17 |  |  |  | (53 | ) |  |  | 21,962 |
U.S. government agency securities | 1-2 |  | 6,492 |  |  |  | 4 |  |  |  | — |  |  |  | 6,496 |
Total |  | $ | 128,102 |  |  | $ | 70 |  |  | $ | (76 | ) |  | $ | 128,096 |
| December 31, 2023 |
| Maturity (in years) | Amortized cost |  |  | Unrealized gains |  |  | Unrealized losses |  |  | Estimated fair value |
U.S. Treasury securities | 1 or less | $ | 76,481 |  |  | $ | 153 |  |  | $ | — |  |  | $ | 76,634 |
U.S. government agency securities | 1 or less |  | 37,376 |  |  |  | 38 |  |  |  | (3 | ) |  |  | 37,411 |
U.S. Treasury securities | 1-2 |  | 18,846 |  |  |  | 118 |  |  |  | — |  |  |  | 18,964 |
U.S. government agency securities | 1-2 |  | 12,379 |  |  |  | 75 |  |  |  | — |  |  |  | 12,454 |
Total |  | $ | 145,082 |  |  | $ | 384 |  |  | $ | (3 | ) |  | $ | 145,463 |
The following tables present fair values and gross unrealized losses for those available-for-sale securities that were in an unrealized loss position, aggregated by category and the length of time that the securities have been in a continuous loss position (in thousands):
| March 31, 2024 |
| Unrealized losses less than 12 months |  |  | Unrealized losses 12 months or greater |  |  | Total |
| Fair value |  |  | Unrealized losses |  |  | Fair value |  |  | Unrealized losses |  |  | Fair value |  |  | Unrealized losses |
U.S. Treasury securities | $ | 12,204 |  |  | $ | (53 | ) |  | $ | — |  |  | $ | — |  |  | $ | 12,204 |  |  | $ | (53 | )
U.S. government agency securities | $ | 16,805 |  |  | $ | (23 | ) |  | $ | — |  |  | $ | — |  |  | $ | 16,805 |  |  | $ | (23 | )
Total | $ | 29,009 |  |  | $ | (76 | ) |  | $ | — |  |  | $ | — |  |  | $ | 29,009 |  |  | $ | (76 | )
| December 31, 2023 |
| Unrealized losses less than 12 months |  |  | Unrealized losses 12 months or greater |  |  | Total |
| Fair value |  |  | Unrealized losses |  |  | Fair value |  |  | Unrealized losses |  |  | Fair value |  |  | Unrealized losses |
U.S. government agency securities | $ | 9,939 |  |  | $ | (3 | ) |  | $ | — |  |  | $ | — |  |  | $ | 9,939 |  |  | $ | (3 | )
Total | $ | 9,939 |  |  | $ | (3 | ) |  | $ | — |  |  | $ | — |  |  | $ | 9,939 |  |  | $ | (3 | )
As of March 31, 2024, there were six available-for-sale securities with an estimated fair value of $29.0 million in a gross unrealized loss position for less than 12 months. As of March 31, 2024, unrealized losses on available-for-sale securities are not attributed to credit risk. The Company believes that an allowance for credit losses is unnecessary because the unrealized loss is due to market factors and interest rate fluctuations. Additionally, the Company does not intend to sell the securities nor is it more likely than not that the Company will be required to sell the securities before recovery of their amortized cost basis. Accrued interest on the Company's available-for-sale securities was $1.5 million as of March 31, 2024 and is included in prepaid and other current assets on the condensed balance sheet.

X
- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//320/tableOfContent + Details
Name: | us-gaap_CashCashEquivalentsAndMarketableSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_MarketableSecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration