Detail of Selected Balance Sheet Accounts - Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 333	$ 510
Bad debt expense (recovery), net	91	(19)
Uncollectible accounts written off, net of recoveries	(14)	(10)
Change due to foreign currency translation	1	12
Balance at end of period	$ 411	$ 493