Fair Value Measurements - Fair Value by Major Security Type (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Sep. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Unrealized Loss	$ 0
Short-term Securities	0	$ 70
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost Basis	32	175
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	32	175
Cash Equivalents	32	105
Short-term Securities	0	70
Long-term Securities	0	0
Fair Value, Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost Basis	32	105
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	32	105
Cash Equivalents	32	105
Short-term Securities	0	0
Long-term Securities	$ 0	0
Fair Value, Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost Basis		70
Gross Unrealized Gain		0
Gross Unrealized Loss		0
Fair Value		70
Cash Equivalents		0
Short-term Securities		70
Long-term Securities		0
Fair Value, Recurring [Member] \| Level 2 [Member] \| Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost Basis		70
Gross Unrealized Gain		0
Gross Unrealized Loss		0
Fair Value		70
Cash Equivalents		0
Short-term Securities		70
Long-term Securities		$ 0

Fair value portion of asset recognized for present right to economic benefit.

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of investment in marketable security, classified as current.

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Amount of investment in marketable security, classified as noncurrent.

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