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Fair Value Measurements and Available for Sale Investments (Tables)
9 Months Ended
Sep. 30, 2025
Fair Value Disclosures [Abstract]  
Schedule of Assets and Liabilities that Require Fair Value Measurements on a Recurring Basis
The following table summarizes our assets and liabilities that require fair value measurements on a recurring basis and their respective input levels based on the fair value hierarchy:
Fair Value Measurements at End of Period Using:
(in thousands)
Fair
Value
Quoted Market
Prices for
Identical Assets
(Level 1)
Significant
Other Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
At September 30, 2025
Money market funds(1)
$94,704 $94,704 $— $— 
Mutual funds(1)
9,217 9,217 — — 
U.S. Treasury securities(2)
130,727 130,727 — — 
Agency securities(2)
2,505 — 2,505 — 
Commercial and corporate obligations(2)
13,589 — 13,589 — 
At December 31, 2024
Money market funds(1)
$104,553 $104,553 $— $— 
Mutual funds(1)
9,376 9,376 — — 
U.S. Treasury securities(1)(2)
284,495 284,495 — — 
 Agency securities(2)
7,579 — 7,579 — 
Commercial and corporate obligations(2)
10,652 — 10,652 — 
(1)    Included in cash and cash equivalents in the accompanying consolidated balance sheets.
(2)    Included in short-term or long-term investments in the accompanying consolidated balance sheets depending on the respective maturity date.
Schedule of Available-for-sale Investments The aggregate market value, cost basis, and gross unrealized gains and losses of available-for-sale investments by security type, classified in short-term and long-term investments as of September 30, 2025 are as follows:
(in thousands)Amortized
Cost
Gross
Unrealized Gains
Gross
Unrealized Losses
Total
Fair Value
Agency securities(1)
$2,506 $— $(1)$2,505 
Commercial and corporate obligations(2)
13,563 26 — 13,589 
U.S. Treasury securities(3)
130,497 230 — 130,727 
     Total available for sale investments$146,566 $256 $(1)$146,821 
(1)    Of our outstanding agency securities, $2.5 million have maturity dates of less than one year and none have maturity dates between one to two years as of September 30, 2025.    
(2)    Of our outstanding commercial and corporate obligations, $13.6 million have maturity dates of less than one year and none have a maturity date of between one to two years as of September 30, 2025.
(3)    Of our outstanding U.S. Treasury securities, $123.0 million have maturity dates of less than one year and $7.7 million have a maturity date of between one to two years as of September 30, 2025.
The aggregate market value, cost basis, and gross unrealized gains and losses of available for sale investments by security type, classified in short-term and long-term investments as of December 31, 2024 are as follows:
(in thousands)Amortized
Cost
Gross
Unrealized Gains
Gross
Unrealized Losses
Total
Fair Value
Agency securities(1)
$7,587 $— $(8)$7,579 
Commercial and corporate obligations(2)
10,642 10 — 10,652 
U.S. Treasury securities(3)
283,985 517 (7)284,495 
     Total available for sale investments$302,214 $527 $(15)$302,726 
(1)    Of our outstanding agency securities, $7.6 million have maturity dates of less than one year and $0.0 million have a maturity date of between one to two years as of December 31, 2024.
(2)     Of our outstanding commercial and corporate obligations, $10.7 million have maturity dates of less than one year and $0.0 million have a maturity date of between one to two years as of December 31, 2024.
(3)     Of our outstanding U.S. Treasury securities, $249.0 million have maturity dates of less than one year and $35.5 million have a maturity date of between one to two years as of December 31, 2024.
Schedule of Unrealized Loss and Fair Values in a Loss Position
The following tables present gross unrealized losses and fair values for those investments that were in an unrealized loss position as of September 30, 2025 and December 31, 2024, aggregated by investment category and the length of time that individual securities have been in a continuous loss position:
September 30, 2025
Less than 12 Months12 Months or GreaterTotal
(in thousands)
Fair Value
Gross
Unrealized Losses
Fair Value
Gross
Unrealized Losses
Fair Value
Gross
Unrealized Losses
Agency securities$2,505 $(1)$— $— $2,505 $(1)
December 31, 2024
Less than 12 Months12 Months or GreaterTotal
(in thousands)
Fair Value
Gross
Unrealized Losses
Fair Value
Gross
Unrealized Losses
Fair Value
Gross
Unrealized Losses
Agency securities$7,579 $(8)$— $— $7,579 $(8)
U.S. Treasury Securities25,250 (7)— — 25,250 (7)
Total
$32,829 $(15)$— $— $32,829 $(15)