Short-term Investments - Summary of Short-Term Investments (Details) - Corporate Bonds - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 7,649	$ 9,511
Unrealized Losses	(24)	(15)
Estimated Fair Value	$ 7,625	$ 9,496

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).

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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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Amount 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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