Detail of Selected Balance Sheet Accounts - Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 411	$ 493	$ 333	$ 510
Bad debt expense (recovery), net	353	(113)	445	(132)
Uncollectible accounts written off, net of recoveries	(57)	0	(71)	(10)
Change due to foreign currency translation	(4)	2	(4)	14
Balance at end of period	$ 703	$ 382	$ 703	$ 382