XML 47 R37.htm IDEA: XBRL DOCUMENT v3.24.2.u1
Fair Value Measurements - Schedule of Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Sep. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]    
Cash equivalents, fair value $ 396,777 $ 392,592
Cost or amortized cost 397,594 398,852
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (5) (100)
Fair value 397,589 398,752
Debt Securities, Available-for-sale, Current 812 6,160
Debt Securities, Available-for-sale, Noncurrent 0 0
Equity Securities, FV-NI 7,298 5,068
Equity Securities, FV-NI, Current 0 0
Equity Securities, FV-NI, Noncurrent 7,298 5,068
Available-for-sale Securities 404,887 403,820
Available-for-sale Securities, Current 812 6,160
Long-term investments 7,298 5,068
Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]    
Equity Securities, FV-NI 7,298 5,068
Equity Securities, FV-NI, Current 0 0
Equity Securities, FV-NI, Noncurrent 7,298 5,068
Money Market Funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]    
Cash equivalents, fair value 396,777 392,592
Money Market Funds | Fair Value, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]    
Cash equivalents, fair value 396,777 392,592
Corporate Debt Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]    
Cost or amortized cost 817 4,412
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (5) (88)
Corporate Debt Securities [Member] | Fair Value, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]    
Fair value 812 4,324
Debt Securities, Available-for-sale, Current 812 4,324
Debt Securities, Available-for-sale, Noncurrent $ 0 0
Municipal Bonds And Notes [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]    
Cost or amortized cost   1,108
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax   0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax   (9)
Municipal Bonds And Notes [Member] | Fair Value, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]    
Fair value   1,099
Debt Securities, Available-for-sale, Current   1,099
Debt Securities, Available-for-sale, Noncurrent   0
U.S. Government Agency Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]    
Cost or amortized cost   740
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax   0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax   (3)
U.S. Government Agency Securities | Fair Value, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]    
Fair value   737
Debt Securities, Available-for-sale, Current   737
Debt Securities, Available-for-sale, Noncurrent   $ 0