Detail of Selected Balance Sheet Accounts - Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 382	$ 300	$ 510	$ 301
Bad debt expense, net	326	136	194	187
Uncollectible accounts written off, net of recoveries	(168)	(2)	(178)	(57)
Change due to foreign currency translation	5	0	19	3
Balance at end of period	$ 545	$ 434	$ 545	$ 434