v3.26.1
Marketable Securities (Tables)
 6 Months Ended
Mar. 31, 2026
Investments, Debt and Equity Securities [Abstract]  
Fair Value of Available-for-Sale Marketable Securities by Type of Security

As of March 31, 2026 and September 30, 2025, the fair value of available-for-sale marketable securities, by type of security, was as follows:

 

 

March 31, 2026

 

 

 

Amortized
Cost

 

 

Gross
Unrealized
Gains

 

 

Gross
Unrealized
Losses

 

 

Credit Losses

 

 

Fair Value

 

 

 

(in thousands)

 

U.S. Treasury notes

 

$

192,434

 

 

$

—

 

 

$

(350

)

 

$

—

 

 

$

192,084

 

 

 

$

192,434

 

 

$

—

 

 

$

(350

)

 

$

—

 

 

$

192,084

 

 

 

 

September 30, 2025

 

 

 

Amortized
Cost

 

 

Gross
Unrealized
Gains

 

 

Gross
Unrealized
Losses

 

 

Credit Losses

 

 

Fair Value

 

 

 

(in thousands)

 

U.S. Treasury notes

 

$

156,521

 

 

$

47

 

 

$

(2

)

 

$

—

 

 

$

156,566

 

 

 

$

156,521

 

 

$

47

 

 

$

(2

)

 

$

—

 

 

$

156,566