Accounts Receivable, net - Allowance for Credit Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 260	$ 227
Additions from acquisitions	106	0
Provision adjustment - expense, net of recoveries	229	90
Write-offs and other deductions	(258)	(57)
Balance at end of period	$ 337	$ 260