Investments (Tables)

3 Months Ended

Dec. 31, 2020

Investments Debt And Equity Securities [Abstract]

Amortized Cost, Unrealized Holding Gains and (Losses) and Fair Value of Available-for-sale Securities

The amortized cost, unrealized holding gains and losses, and fair value of available-for-sale securities were as follows:

	December 31, 2020
(In thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Commercial paper and corporate bonds	$	18,120	$	5	$	(5	)	$	18,120
Total	$	18,120	$	5	$	(5	)	$	18,120

	September 30, 2020
(In thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Commercial paper and corporate bonds	$	30,313	$	19	$	(19	)	$	30,313
Total	$	30,313	$	19	$	(19	)	$	30,313