Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Financial Assets Measured on a Recurring Basis

The following tables represent financial assets that we measured at fair value on a recurring basis at March 31, 2021 and September 30, 2020:

March 31, 2021	Active Markets for Identical Instruments (Level 1)		Fair Value as of March 31, 2021
	(In thousands)
Assets:
Cash equivalents (1)	$	194	$	194
Marketable securities (2)	30,437		30,437
Total	$	30,631	$	30,631
September 30, 2020	Active Markets for Identical Instruments (Level 1)		Fair Value as of September 30, 2020
	(In thousands)
Assets:
Cash equivalents (1)	$	35,275	$	35,275
Marketable securities (2)	25,513		25,513
Total	$	60,788	$	60,788

(1)Included in cash and cash equivalents on our condensed consolidated balance sheets at March 31, 2021 and September 30, 2020. Not included in these tables are cash deposits of $197.6 million and $122.1 million at March 31, 2021 and September 30, 2020, respectively.

(2)Represents securities held under a supplemental retirement and savings plan for senior management employees, which are distributed upon termination or retirement of the employees. Included in marketable securities on our condensed consolidated balance sheets at March 31, 2021 and September 30, 2020.