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Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Schedule Of Financial Assets Measured At Fair Value on A Recurring Basis

The Company's financial assets measured at fair value on a recurring basis subject to the disclosure requirements at September 30, 2023 and 2022, were as follows (in thousands):

																		Gross Unrealized																		Classification on Balance Sheet
As of September 30, 2023						Fair Value Level						Cost or Amortized Cost						Gains						Losses						Aggregate Fair Value						Cash and Cash Equivalents						Short-Term Investments						Long-Term Investments
Changes in fair value recorded in other comprehensive income
Money Market Funds						Level 1						$	392,592					$	—					$	—					$	392,592					$	392,592					$	—					$	—
Corporate bonds and notes						Level 2						4,412						—						(88)						4,324						—						4,324						—
Municipal bonds and notes						Level 2						1,108						—						(9)						1,099						—						1,099						—
U.S. government securities						Level 2						—						—						—						—						—						—						—
U.S. government agency securities						Level 2						740						—						(3)						737						—						737						—
Total debt investments												$	398,852					$	—					$	(100)					$	398,752					$	392,592					$	6,160					$	—
Changes in fair value recorded in other net income (expense)
Equity investments						*																								$	5,068					$	—					$	—					$	5,068
Total equity investments																														5,068						—						—						5,068
Total investments																														$	403,820					$	392,592					$	6,160					$	5,068

 * The fair value of this equity investment is measured at net asset value (NAV) which approximates fair value and is not classified within the fair value hierarchy.

																		Gross Unrealized																		Classification on Balance Sheet
As of September 30, 2022						Fair Value Level						Cost or Amortized Cost						Gains						Losses						Aggregate Fair Value						Cash and Cash Equivalents						Short-Term Investments						Long-Term Investments
Changes in fair value recorded in other comprehensive income
Money Market Funds						Level 1						$	276,294					$	—					$	—					$	276,294					$	276,294					$	—					$	—
Corporate bonds and notes						Level 2						50,828						—						(950)						49,878						912						44,356						4,610
Municipal bonds and notes						Level 2						5,018						—						(102)						4,916						—						3,812						1,104
U.S. government securities						Level 2						84,734						—						(660)						84,074						10,120						73,954						—
U.S. government agency securities						Level 2						5,825						—						(75)						5,750						606						4,432						712
Total debt investments												$	422,699					$	—					$	(1,787)					$	420,912					$	287,932					$	126,554					$	6,426
Changes in fair value recorded in other net income (expense)
Equity investments						*																								$	3,118					$	—					$	—					$	3,118
Total equity investments																														3,118						—						—						3,118
Total investments																														$	424,030					$	287,932					$	126,554					$	9,544

* The fair value of this equity investment is measured at NAV which approximates fair value and is not classified within the fair value hierarchy.

Impairment Charges

Impairment charges were allocated to the following income statement line items for the years ended September 30, 2023, 2022, and 2021 (in thousands):

						Years Ended September 30,
						2023						2022						2021
Cost of net product revenue						$	—					$	—					$	2,865
Cost of net service revenue						—						—						3,492
Sales and marketing						—						6,175						11,515
Research and development						—						—						12,974
General and administrative						—						—						9,852
Restructuring charges						3,455						—						—
Total impairment charges						$	3,455					$	6,175					$	40,698

X

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 10
-Topic 360
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1

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